One Tube Regenerative Receiver

0: 32,30 (2) 61: A 30's Style 3 Tube Regen Receiver: I like his prototype style; lots of jumpers. The information on this site is updated hourly, so if you are interested in one-tube radios for sale, bookmark this site so you can visit often. I already have a few simple tube radios that I bought at flea markets, so I will defer any tube projects for a while yet. That is the 20 pF trimmer capacitor across the coil. A minimal antenna length would be about 6 feet, 15 feet would be a maximum. One Tube Regen Receiver. Doerle "sets" were a popular home built regenerative shortwave receiver of the 1930s. 71 shipping. The basic paradigm of this design is to break up the traditional oscillating detector into a separated regenerative amplifier and detector circuit. Since there are really two valves in one glass envelope, the set is really a two-valve receiver. Ham Radio Equipment Dj Equipment Radio Design Antique Radio Electronics Gadgets Audiophile Mason Jars Tube Product Launch. Regenerative radio receiver book. The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. The Radio Shop One Tube Regenerative Receiver ©February 2012 - Bill Harris. However after constructing it, I was less than impressed. Although I built one from a kit (4-States QRP) as my first electronics project a couple years ago I thought I'd go for the real deal and build a vacuum tube regen receiver. 20 shipping. Regen Receiver using 6J5 and 6AQ5 Tubes - Complete with schematic, by N4JVP. The part count is low and the sensitivity is quite remarkable. Andrew November 14, 2018 at 11:41 am. Crystal-Tube Receiver From Junk-Box Parts for Beginners Page 1 Page 2. It was called the Doerle Twinplex because it used the brand new 19 vacuum tube which contained two triodes in one glass envelope. 1) The Jones "One-Tube" Regenerative Receiver. Modern SSB reception (these days) is dependent upon very careful adjustment and your imagination – SSB stability isn’t great (it’s poor) but theirs brought in the AM news from BBC, Radio Australia and US west coast stations including. This design uses the triode as a tuned grounded-grid RF amplifier ahead of the pentode detector section. 0: 32,30 (2) 61: A 30's Style 3 Tube Regen Receiver: I like his prototype style; lots of jumpers. The regenerative detector uses a field effect transistor (FET). Some combination of those 4 tweaks will give you the best sounding audio and hopefully keep the signal level where minimal clipping of peaks occurs. This is the later version of the Ace V. 5 thoughts on “ Regenerative Receiver from 1950 Boys Life Magazine ” Jon September 7, 2014 at 4:58 pm. The regenerative radio receiver or, even super-regenerative radio receiver or, "regen" if you prefer, are basically oscillating detector receivers. Armstrong (Westinghouse Elec), June 2 1925, 455/336 - two tube adjustable Super Regenerative. The 6U8A tube includes a triode and a pentode in one 9 pin envelope. Custom Built Am-Shortwave Tube Regenerative Receiver One Of A Kind! Homebrew Shortwave Regen Radio With Headphones (3. 5 V DC for the filaments and 45V DC for the plate current. Borden Radio "Armstrong one tube Regenerative Receiver" early radio development and notes on Edwin Armstrong and his invention of the regenerative radio receiver. That is the 20 pF trimmer capacitor across the coil. The regen radio was one of the many inventions in radio technology that was made by Edwin Armstrong. Though they were once very popular among amateurs and professionals alike, they are now thought of as mere play toys instead of legitimate receivers. I purchased the book (and I highly recommend it) and began work on the receiver. A 1948 era One Tube Regen, using a 6SN7 This site by Gary Johanson, WD4NKA, contains a number of interesting projects besides the regen, which is Project #1 on the page The AA8V Twinplex Regenerative Receiver (uses 6SN7s). FS: RAL-7 regenerative receiver w/ solid state PS - P/U only near Denver, CO. most of BJT version will suffer cause BJT low input impedance and hard to control the regen, and most of them use resistor as re-gen control. The immediate precursor to the original Twinplex receiver appeared in 1934, as a DYI construction article in a radio…. About ten years ago I happened to buy the September, 1936 issue of Popular Mechanincs and was fascinated by the plans for a one-tube regenerative radio that didn't need a B-battery, but operated on one 1 1/2 volt D cell and 6 volts from penlight batteries. 3-7MHZ / 6-18MHZ Metal Casing Bass Tremble 4-inch Speaker _ {categoryName} - AliExpress Mobile Version -. Custom Built Am-Shortwave Tube Regenerative Receiver One Of A Kind! Homebrew Shortwave Regen Radio With Headphones (3. 1 mm jack for external 12v input or 9v on board battery. Tube Regenerative Receiver Inspired by an old movie I saw one late night, I thought I'd have a crack at building something with tubes (this was my first tube project). Radio detector circuits take a variety of forms. This radio includes a set of plug-in tuning coils (550. For our purposes, the triode vacuum tube will serve as the heart of the regenerative radio receiver. Power Supply DIY Kit for Antique Radios, Amplifiers, Etc $64. 5 megohm" rf choke. This is an example of "breadboard" construction; mounting all of the parts on a piece of wood rather than on an aluminum or steel chassis--a popular, inexpensive technique widely used in the early days of radio and electronics. The antenna tuner has one small design quirk. Presently working on the cabinet. The receiver tunes the entire 30m band (10100-10150) and performs quite well. The receiver employs a common 1T4 Pentode tube that is still cheap and easily obtainable. Beginners and Experts Welcome! and a vacuum tube based regen at that !! Bottom line the Ferrite Phoenix is a very capable receiver, considering it consists of only one tube. (From this link, you'll need to scroll down to page 56 to read the article. Regenerative receivers are good but the real magic is in the super-regenerative receiver (which really should have an RF buffer amplifier in front of it). The Superheterodyne receiver uses many of the same components as the TRF and Regenerative receivers but adds special oscillator and amplifier circuits that make tuning into the desired station very easy. A regenerative radio receiver is unsurpassed in comparable simplicity, weak signal reception, inherent noise-limiting and agc action and, freedom from overloading and spurious responses. For years I wanted to build some of the projects. Armstrong Regenerative Radio Receiver DIY Tube Socket Choke 2. 5 V DC for the filaments and 45V DC for the plate current. While it "received" stations, the sensitivity was poor, the aerial loading caused dropouts or changes in oscillation level, and of course the stereo/SCA. After searching around online, I found a 12AT7 based regen that seemed simple enough to build. Crystal-Tube Receiver From Junk-Box Parts for Beginners Page 1 Page 2. For our purposes, the triode vacuum tube will serve as the heart of the regenerative radio receiver. Those who like to experiment with transistors will find some useful tips here on using them as regenerative detectors. FA: ALLIED KNIGHT SPAN MASTER TUBE REGENERATIVE SW RECEIVER. Here is a picture of the front of my second tube regenerative receiver. I had a brand new, black powder coat chassis that I had gotten at a hamfest years ago that would serve as the chassis. It is mounted just below/left of the RF tube. Resources listed under Regenerative Receiver category belongs to Receivers main collection, and get reviewed and rated by amateur radio operators. About ten years ago I happened to buy the September, 1936 issue of Popular Mechanincs and was fascinated by the plans for a one-tube regenerative radio that didn't need a B-battery, but operated on one 1 1/2 volt D cell and 6 volts from penlight batteries. I already have a few simple tube radios that I bought at flea markets, so I will defer any tube projects for a while yet. Homebrew Two Tube Regenerative Radio. Small changes in temperature or supply voltage can affect the set's tuned circuit, causing frequency shift in the set. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. Regenerative Receivers - Surplus Frequency Meter Becomes Regen - a very interesting project. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to the superheterodyne's superior performance and the falling cost of tubes. The cathode RFC is clearly visible above the tube socket. LM386 Regen Demo by W9RAN - Duration: 4:50. So much for a one-tube transmitter. A 2000 ohm headset or an audio amplifier is required. As can be seen in the schematic diagram in figure. Stay safe and healthy. But the set no longer worked. ew Two Tube Regenerative Set at í18s° ,, s1t, 7- ,u- ='-;-. Aug 18, 2019 - High Performance Regenerative Receiver - Ham Radio DIY Projects - YouTube. I am able to tune in stations from 600-1600 Khz, most US AM stations. 1 uV (cw regen mode). In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to its superior performance and the falling cost of tubes. * A related problem is that, the better a keyed vacuum tube oscillator sounds, the less output power you will get from it. The regen still makes a great contest radio. i; r - Crosley Model 51 New Two -Tube Armstrong Regenerative Price Only $18. The triode section is used in an Armstrong regenerative detector and the pentode section is used as an audio amplifier. Regenerative receivers are good but the real magic is in the super-regenerative receiver (which really should have an RF buffer amplifier in front of it). The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. This kind of receiver is easy (and fun) to build and has been used by many generations of hams to learn radio basics. Triodes are the original detectors. The regenerative RF section of the receiver is shown in figure 1a. 1) The Jones "One-Tube" Regenerative Receiver. most of BJT version will suffer cause BJT low input impedance and hard to control the regen, and most of them use resistor as re-gen control. loctal regenerative receiver See more. Complete Details Before you buy, download the manual (1. In addition to the tube and plug-in coils, it includes a tuning capacitor, a variable resistor for the regeneration control, two fixed capacitors, one fixed resistor, and one RF choke. One Tube Radios, Vacuum Tube Projects, Regenerative Receiver, Knight Knightkit, Space Spanner This page illustrates several of the vacuum tube projects that I've been recently working on. One Tube Direct Conversion Receiver With the regen set at a modest level, the operation was as described. 12/03/2006 I couldn't resist making just a couple more changes. So that settled it, this little box was going to be a regenerative receiver. Super-Regenerative Receiver 1; System 5; T. Hi Richard. Got one to sell?. A D cell and five 9V transistor batteries wired in series will work to power this radio. The antenna tuner has one small design quirk. Fall 1995, pp 7-26. Appears to be a three coil regenerative receiver built with some very nice parts, faceplate and cabinet - but has not been tested. You can probably guess that I'm a big fan of Alfred Morgan's series of books such as:. In addition, the tube's gle- ments are physically large and the prin¬ ciples involved are simpler and easier to understand. Feb 20, 2018 - One Tube 12V DC Shortwave Regen Receiver - SW Tube Radio DIY - YouTube. The internet is amazing! Ado_PO: One Tube Regenerative Radio: Monday, September 28, 2009 4:11:11 PM. I had been acquiring parts for building this version of a 1930s ARRL Handbook Regenerative receiver for some time. com in a single category. IGEN MAX - Two Tube Regenerative Radio Kit with Varactor Tuning & Plug-In Coils - $46. The regenerative stage is first, followed by a transformer coupled audio amplifier stage. iGen-Max Two Tube Regenerative Radio Kit ! (Version 4 - New for Jan 2014) Tube regenerative receiver based on original 1930's design, with a modern twist, Varactor tuning and a solid state audio amplifier. Armstrong and patented in 1914. However, the modern superheterodyne (superhet for short) can be built as a one tube radio as well. For a photo, click the link at the bottom of the page and slect Foto for this project. While it "received" stations, the sensitivity was poor, the aerial loading caused dropouts or changes in oscillation level, and of course the stereo/SCA. Doerle of Oakland, California. My goal was to build a recreation of a Thirties era radio, based loosely on the popular "Twinplex" kit. 5 MHz Audio output: Headphone level only with diode audio limiters for listener safety Power supply: 2. This design uses the triode as a tuned grounded-grid RF amplifier ahead of the pentode detector section. From many research, I decided to give a try on this one as a start. This radio includes a set of plug-in tuning coils (550. The tube is still used today in high end audio equipment. All Product Information Customer Q&A's Customer. Tubes are 35W4 as rectifier, 50C5 for audio output and a 12AT6 triode as the regenerative RF detector. Armstrong Regenerative Receiver. So far received 4 votes for a total score of 10. The set is mounted on a 7×8 inch wood base. The "One Tube FM Tuner" described in Popular Electronics, August 1960 is about the simplest valve receiver for reception of the 88-108Mc/s FM broadcast band. TUBES, Tube Radios, Tube Theory, Tube Guitar Amps, Tube Manuals, TUBE Videos, Tube Basics, Tube PDF's, ELECTRON TUBE THEORY, TUBE AMPLIFIERS, GUITAR AMPS, TUBE RADIOS, TUBE ELECTRONICS, 5 TUBE RADIOS, TUBE RECTIFIERS, TRIODE TUBES, TETRODE TUBES, PENTODE TUBES, TUBE BIASING, TUBE TRANSMITTERS. This radio kit will cover the AM radio band along with the SW radio band. About ten years ago I happened to buy the September, 1936 issue of Popular Mechanincs and was fascinated by the plans for a one-tube regenerative radio that didn't need a B-battery, but operated on one 1 1/2 volt D cell and 6 volts from penlight batteries. 30' of antenna, 80-year-old components (except the grid-leak, which is a cheat, I slipped a modern resistor into the glass tube). Modern SSB reception (these days) is dependent upon very careful adjustment and your imagination - SSB stability isn't great (it's poor) but theirs brought in the AM news from BBC, Radio Australia and US west coast stations including. The 1D8GT is a 3 section tube, including a triode and pentode. Although I built one from a kit (4-States QRP) as my first electronics project a couple years ago I thought I'd go for the real deal and build a vacuum tube regen receiver. It uses a 1S4 tube with three 9 volt batteries for plate, and two 1. Feb 20, 2018 - One Tube 12V DC Shortwave Regen Receiver - SW Tube Radio DIY - YouTube. It uses the best features of many famous one tube sets and has features not found on most radios of its type. Low voltage (12vdc) two tube regen receiver using "space charge" technology before i go into the details, let me say that i've built about 1/2 dozen one and two tube regens over the years (and several superhets) and this one is by far the most selective, most stable, and easiest to use regen. The Receivers I. A regenerative radio receiver is unsurpassed in comparable simplicity, weak signal reception, inherent noise-limiting and agc action and, freedom from overloading and spurious responses. While regenerative sets are a pretty common approach to a one tube radio design, there are a number of design features that can make the set a great performer. Old Time "Interflex" Radio Receiver JPG Files. 75" high x 8. So, here is a one-tube broadcast band regenerative receiver project. Regenerative Receiver in Electronics Now. The kit comes with a ten page pamphlet. Power for this receiver is 1. 5 megohm" rf choke. The 6U8A tube includes a triode and a pentode in one 9 pin envelope. This radio kit will cover the AM radio band along with the SW radio band. Most of this reputation is due to design short cuts that have been implemented over the years. This particular schematic shows a 1G6 tube instead of the original #19 or #53 tube. After searching around online, I found a 12AT7 based regen that seemed simple enough to build. But the set no longer worked. This site is designed to help you quickly and easily find the latest one-tube radios for sale. Had a chance to test it for a bit, thanks to a friend which bought and built one. From November 2016, an even simpler design: this one came from the "W1FB Design Notebook", figure 5-2. Power Supply DIY Kit for Antique Radios, Amplifiers, Etc $64. Doerle "sets" were a popular home built regenerative shortwave receiver of the 1930s. All my receivers are built breadboard style. The receiver, dubbed 'The Moorabbin', is a two transistor regenerative receiver of conventional design. This design uses the triode as a tuned grounded-grid RF amplifier ahead of the pentode detector section. A 1948 era One Tube Regen, using a 6SN7 This site by Gary Johanson, WD4NKA, contains a number of interesting projects besides the regen, which is Project #1 on the page The AA8V Twinplex Regenerative Receiver (uses 6SN7s). Armstrong (Westinghouse Elec), Dec 21 1926, 375/338 -. 5 V DC for the filaments and 45V DC for the plate current. Most 6U8A regen designs use the pentode as the detector and the triode as an audio amp. The tube is still used today in high end audio equipment. With this kit, you can power-up most, small one and two tube sets. 0: 30,33: 62: Hear All Continents (HAC) One-Valve Regenerative: Towards the bottom of the page. 1 MHz to 10+ MHz Receiver sensitivity: -130 dBm or 0. of one tube, filled the needs of the growing radio community and immediately thrived. Constructed from re-cycled componentry. Although I built one from a kit (4-States QRP) as my first electronics project a couple years ago I thought I'd go for the real deal and build a vacuum tube regen receiver. Wagner, and it reports. Regenerative receiver history. One Tube Regenerative Radio Project From Radio Craft Magazine, March 1935: A "Distance Getter" -for a $1 "Build me the simplest possible radio receiver," was the order that came down the line from the Big Chief, who continues, "Just imagine yourself. Requires two T-1T4_DF91 tubes (not included). Morgan Regenerative Receiver. A one tube radio receiver using a magic eye tube. Low-Voltage 2-Tube Regen Receiver. Regenerative: 13. Welcome to the Crystal Set Radio site and the One-Tube Radio resource page. The tube gain will determine the tickler coil composition and how much feedback you will need. Over a decade of homebrew tube radios, and much excellent material on regens. This site is designed to help you quickly and easily find the latest one-tube radios for sale. Homebrew Two Tube Regenerative Radio. First one tube, then two, then three, then four, and in the case of some broadcast receivers, six tubes were employed as the years went by. The most used spy radio transceiver during WWIII was the "Paraset" which used a regenerative two-tube receiver, one tube for the detector and the other for audio amplifying. 1950-era one tube regenerative receiver. The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. Crystal-Tube Receiver From Junk-Box Parts for Beginners Page 1 Page 2. Regenerative receivers are good but the real magic is in the super-regenerative receiver (which really should have an RF buffer amplifier in front of it). I purchased the book (and I highly recommend it) and began work on the receiver. The triode section is used as a regenerative detector, and the pentode section (wired as a triode) is used as a stage of audio amplification. Custom Built Am-Shortwave Tube Regenerative Receiver One Of A Kind! Homebrew Shortwave Regen Radio With Headphones (3. Station Description The "First Receiver for the Novice" is a two tube regen. Most any triode to pentode tube will work in a regenerative receiver. A 2000 ohm headset or an audio amplifier is required. Most parts are mounted on a printed circuit board that you get to make yourself. One Tube 12V DC Shortwave Regenerative Receiver - 12BA6 Regen Receiver. Build this broadcast receiver from the early days of radio. 1942 One Tube "Beginner's Special" Receiver. Just start with a larger tickler and peel off turns. 0 bids +$14. My other hobby is designing and building simple, one transistor regen receivers, most of which tune the AM broadcast band, although I have built a couple covering the lower portion of the HF broadcast bands as well, just for a challenge. I thought it was the 1950 ARRL version until I noticed a variation. A New York amateur by the name of Edwin H. 6 ounces Customer Reviews: Be the first to write a review Amazon Best Sellers Rank: #3,473,978 in Books (See Top 100 in Books). Since there are really two valves in one glass envelope, the set is really a two-valve receiver. The 1-Tube Regenerative Kit is an up-grade "clone" of a very old kit that was available in the 50's. One tube regen from Morgan's First Book of Radio : Page 1 of 2 [ 23 posts ] Go to page 1, It is the one-tube regen set in Morgan's "Boy's First Book of Radio. It offers the super-regenerative + super-heteroyne type. After searching around online, I found a 12AT7 based regen that seemed simple enough to build. A 'Universal' Regenerative Detector that receives AM, SW, or FM! Oct 30, 2004 by Rick Andersen Here is an amazingly versatile circuit-- look closely and you'll see that it's really the same detector found in my article on the Superregen for FM VHF Aircraft. The three coils, two Deforest - one unknown, all have continuity and are type 75. 4 inches Shipping Weight: 5. 1 uV (cw regen mode). Modern SSB reception (these days) is dependent upon very careful adjustment and your imagination - SSB stability isn't great (it's poor) but theirs brought in the AM news from BBC, Radio Australia and US west coast stations including. Although I built one from a kit (4-States QRP) as my first electronics project a couple years ago I thought I'd go for the real deal and build a vacuum tube regen receiver. Regenerative Receiver in Electronics Now. The right-side tube is audio. The "top" 1/2 is. That is the 20 pF trimmer capacitor across the coil. A regenerative detector is much more robust than any dual gate FET mixer, it is very sensitive to weak signals and it will demodulate AM in addition to single side band and Morse code. Radio detector circuits take a variety of forms. "Ace" was a brand name of the Precision Equipment Company, which Crosley purchased in early 1923, in order to obtain their Armstrong patent. Few would have predicted the revolutionary changes that took place in Amateur. 1 MHz to 10+ MHz Receiver sensitivity: -130 dBm or 0. Low Voltage (12VDC) Two Tube Regen Receiver Using "Space Charge" Technology Before I go into the details, let me say that I've built about 1/2 dozen one and two tube Regens over the years (and several superhets) and this one is by far the most selective, most stable, and easiest to use Regen. Best one-tube design that I have encountered so far. The "One Tube FM Tuner" described in Popular Electronics, August 1960 is about the simplest valve receiver for reception of the 88-108Mc/s FM broadcast band. a few years ago, i stumbled on an unusual regenerative design that operated on 12 volts — not the 100 or more of conventional tube designs. Tube Regenerative Receiver Inspired by an old movie I saw one late night, I thought I'd have a crack at building something with tubes (this was my first tube project). The circuit is based on a design by EN Bradley for a pocket one-valve receiver, which used a 3A5 (DCC90) valve. A one tube regenerative receiver using a loctal type tube. Have a question? Find answers in product info, Q&As, reviews. The 3 Transistor Short Wave Radio illustrated in this article is a regenerative receiver design. IGEN MAX - Two Tube Regenerative Radio Kit with Varactor Tuning & Plug-In Coils - $46. Transmitter / Receiver Schematics and Parts Lists 1957 ARRL Handbook (34th Edition) Typical Regenerative Receiver Circuits, Page 90; Schematic A One Tube Regenerative Receiver (6U8) Page 113. I can't find the article at the moment. Regenerative Receiver category is a curation of 24 web resources on , A 12-Volt Homebrew Regen, Designing Super-Regenerative Receivers, Small Portable Regenerative Receiver. 12/03/2006 I couldn't resist making just a couple more changes. In addition to the tube and plug-in coils, it includes a tuning capacitor, a variable resistor for the regeneration control, two fixed capacitors, one fixed resistor, and one RF choke. 0: 30,33: 62: Hear All Continents (HAC) One-Valve Regenerative: Towards the bottom of the page. Build this broadcast receiver from the early days of radio. Armstrong and patented in 1914. 1 Tube Wallop. First one tube, then two, then three, then four, and in the case of some broadcast receivers, six tubes were employed as the years went by. I purchased the book (and I highly recommend it) and began work on the receiver. The tube gain will determine the tickler coil composition and how much feedback you will need. Page 1 Page 2 Page 3 Page 4 Page 5 Page 6: One-Tube Radio Can Be Mailed JPG File Page1: Miniature-Tube Set Works On Flashlight Cells JPG Files Page 1 Page 2 Page 3 "Roll Your Own". Rectangular wooden box, top hinged at rear. The 12AT7 Regen. That was exciting. You can probably guess that I'm a big fan of Alfred Morgan's series of books such as:. Back in the day, Radio had so called P Kits. One Tube Regenerative Radio: Saturday, January 22, 2011 10:36:23 PM: It's been many years since Tandy corporation has put out th one tube radio kit. Regenerative: 17. Addeddate 2018-10-13 21:13:37 Coverleaf 0. Coil is wound on a phenolic or "bakelite" form (cut from longer piece, source McMaster-Carr). The triode section is used as a regenerative detector, and the pentode section (wired as a triode) is used as a stage of audio amplification. A little Goggling got me here to your blog. A low mu tube works best, but medium mu tubes are ok. Homebrew Radio ex-Silicon Tagged: homebrew radio Regenerative Radio (before Battery Powered Tube Homebrew Shortwave 12bl6 One Tube Regen Radio Receiver Auctions - Buy And Sell - FindTarget Auctions Regenerative radio using one Tagged: ham-radio vacuum tubes 2 tube shortwave radio:. Can replace the 30's with 1H4's. It's a one-tube transmitter/receiver. To my amazement, the radio worked on the first try so the next step was to find another TV tube that contains a rectifier and high gain triode in one package. Brand: Crosley. Anyway, I rebuilt it as a one-tube set. The internet is amazing! Ado_PO: One Tube Regenerative Radio: Monday, September 28, 2009 4:11:11 PM. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. Regenerative receivers, by contrast, could often get adequate gain with one tube. After the front end diode detection, there are two stages of amplification. Regen Receiver using 6J5 and 6AQ5 Tubes - Complete with schematic, by N4JVP. I began to understand that my 100 milliwatt transmitter might easily end up. Modern SSB reception (these days) is dependent upon very careful adjustment and your imagination – SSB stability isn’t great (it’s poor) but theirs brought in the AM news from BBC, Radio Australia and US west coast stations including. A 2000 ohm headset or an audio amplifier is required. The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. A low mu tube works best, but medium mu tubes are ok. One Tube Radios, Vacuum Tube Projects, Regenerative Receiver, Knight Knightkit, Space Spanner This page illustrates several of the vacuum tube projects that I've been recently working on. This particular schematic shows a 1G6 tube instead of the original #19 or #53 tube. The detector is a “plate detector”, where RF is fed back to the Amplifier via a partially RF decoupled source (normally bypassed all the way for RF when used as a detector). This new receiver had greater sensitivity than the crystal detectors then in use. 06 of a amp, making it easy on the "A" battery which is a 1 1/2 volt "D" cell. 5 inches x 6. Arnaldo Coro Antich Sent: Friday, January 02, 2004 8:19 PM Subject: Re: Amended Schematic No mistake, in the version I am running right now the double stack pot takes care of fine regen control. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to its superior performance and the falling cost of tubes. The antenna tuner has one small design quirk. 0: 30 (2) 40: battery powered regenerative receiver using. The 6U8A tube includes a triode and a pentode in one 9 pin envelope. I already have a few simple tube radios that I bought at flea markets, so I will defer any tube projects for a while yet. I had a brand new, black powder coat chassis that I had gotten at a hamfest years ago that would serve as the chassis. So, here is a one-tube broadcast band regenerative receiver project. Regenerative receivers, by contrast, could often get adequate gain with one tube. 1472092 Receiver for Wireless Telegraphy, RCA, Oct 30 1923, 455/286; 455/290; 455/312; 455/315 1539821 Wave Signaling System, E. That was exciting. The tube is still used today in high end audio equipment. Some might argue that it is the best general purpose dual. This is probably the simplest radio receiver circuit that one could ever imagine of making. 4-Regenerative circuit using the tuned plate method From the fundamental circuit of the simplest form, we have the circuit of a vacuum tube receiver as shown in Figure 2. Homebrew Radio ex-Silicon Tagged: homebrew radio Regenerative Radio (before Battery Powered Tube Homebrew Shortwave 12bl6 One Tube Regen Radio Receiver Auctions - Buy And Sell - FindTarget Auctions Regenerative radio using one Tagged: ham-radio vacuum tubes 2 tube shortwave radio:. For years I wanted to build some of the projects. The main category is Regenerative Receiver that is about Regenerative Receiver. and this being my first regenerative receiver, was no exception. Build An Armstrong One-Tube Radio! This little radio is the distillation of many circuits for one-tube sets that have appeared since Edwin Armstrong invented the regenerative circuit in 1912. Most any triode to pentode tube will work in a regenerative receiver. The Regen Receiver is beautiful in its simplicity. One improvement Armstrong proposed was that Amplifier 1 could also be used as the local oscillator in addition to the detector by taking advantage of feedback from the plate into the grid circuit similar to what he and de Forest had accomplished with the regenerative receiver. Regulated voltage for Regenerative receiver project Mr. Buy It Now +$38. The 1D8GT is a 3 section tube, including a triode and pentode. This particular schematic shows a 1G6 tube instead of the original #19 or #53 tube. All Product Information Customer Q&A's Customer. Check here: Just one single 12AT7 tube! Typical application here: Cheers, Miguel. List - Gives frequencies used in many tube radios. The detector is a "plate detector", where RF is fed back to the Amplifier via a partially RF decoupled source (normally bypassed all the way for RF when used as a detector). Chappy Happy 28,296 views. I had been acquiring parts for building this version of a 1930s ARRL Handbook Regenerative receiver for some time. The Receivers I. I won't forget how exciting it was for me to build such a humble radio that so greatly out-performed the crystal receivers that I had been building up to that point. Regenerative radio receiver book. Triodes are the original detectors. The circuit is based on a design by EN Bradley for a pocket one-valve receiver, which used a 3A5 (DCC90) valve. Forums for radio builders and experimenters. One Tube Radios, Vacuum Tube Projects, Regenerative Receiver, Knight Knightkit, Space Spanner This page illustrates several of the vacuum tube projects that I've been recently working on. Homebrew Two Tube Regenerative Radio. At the Brimfield Antique Show in Brimfield, MA several days ago, I found and bought a built up 6SN7 regen receiver. The NRQ-62, Bruce Vaughan built 59 regen receivers prior to his Ultimate Regenerative Receiver, #60. The AA8V Twinplex Regenerative Receiver - Main Page and Exterior Photos This pedal is a vintage tube booster/overdrive pedal with the addition of tremolo section that can be activated at the flick of a switch. A regen set is usually operated near or at the point of oscillation. 5 V DC for the filaments and 45V DC for the plate current. The Flat Top radio is a one tube shortwave regenerative receiver using the popular 1625 tube. Building Notes for Tube Type Regenerative Radios by Dave…. In addition to the tube and plug-in coils, it includes a tuning capacitor, a variable resistor for the regeneration control, two fixed capacitors, one fixed resistor, and one RF choke. I had first encountered this book when I was a teenager. The set was designed with wartime parts shortages in mind, and most parts were non-critical, and could be found in most junk boxes. I am able to tune in stations from 600-1600 Khz, most US AM stations. Homebrew Regen Shortwave Receiver Craig LaBarge, WB3GCK. All Product Information Customer Q&A's Customer. Saved from youtube. The voltages required were different although. Feb 20, 2018 - One Tube 12V DC Shortwave Regen Receiver - SW Tube Radio DIY - YouTube Stay safe and healthy. and a beautiful TRF Receiver. Back in the day, Radio had so called P Kits. This one tube receiver is designed to operate crystal earphones or as a tuner followed by an audio amplifier and will rival many super het receivers. Of course I had several ways I could go if I built a regenerative receiver into this. It was called the Doerle Twinplex because it used the brand new 19 vacuum tube which contained two triodes in one glass envelope. Version 2: (07/30/2015). While it "received" stations, the sensitivity was poor, the aerial loading caused dropouts or changes in oscillation level, and of course the stereo/SCA. The author is also a short wave enthusiast and for some time used his family's Philips MW/SW vacuum tube radio. Schematic only. The circuit itself is a very straightforward regenerative receiver covering the broadcast band. And most important, watch the videos that MIKROWAVE1 has uploaded. The Receivers I. Price: $295. Presently working on the cabinet. The AA8V Twinplex Regenerative Receiver - 6SN7GTB General Information and 6SN7GTB Tube Data Sheets. Building an early 1930s-style 2 tube Regenerative Receiver. Armstrong (Westinghouse Elec), Dec 21 1926, 375/338 -. 15 watching. Regenerative Receiver category is a curation of 24 web resources on , A 12-Volt Homebrew Regen, Designing Super-Regenerative Receivers, Small Portable Regenerative Receiver. Build An Armstrong One-Tube Radio! This little radio is the distillation of many circuits for one-tube sets that have appeared since Edwin Armstrong invented the regenerative circuit in 1912. It uses a 1S4 tube with three 9 volt batteries for plate, and two 1. While it "received" stations, the sensitivity was poor, the aerial loading caused dropouts or changes in oscillation level, and of course the stereo/SCA. The circuit is in the 1937 and 1938 Handbooks. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to its superior performance and the falling cost of tubes. As time went on, other advances were made in tube technology, including the addition of an indirectly heated cathode and other grids. 7 MHz), with a receiver you build complete from the supplied chassis pieces, electrical components, and hardware. receiver technology. Dual band receiver > Lower Band: Roughly 3. It's a one-tube transmitter/receiver. 7 MHz), with a receiver you build complete from the supplied chassis pieces, electrical components, and hardware. One half of a 6AN8 tube serves as an RF amplifier and the other half as a regenerative receiver. : It uses a 3S4 vacuum tube and requires a long wire antenna and ground connection to operate. one tube is a # 31 and I believe it is an amplifier tube the other tube I cannot read. The 3 Transistor Short Wave Radio illustrated in this article is a regenerative receiver design. Borden Radio "Armstrong one tube Regenerative Receiver" Analog Dial Page 1 Page 2 : This is an assembled regenerative AM broadcast band receiver kit, developed and sold by Lance Borden. have not done a thing in 10 years. Power for this receiver is 1. Presently working on the cabinet. I will post pictures and a better description when I have done so. receiver technology. A 6SJ7 regenerative detector is followed by a 6SN7 dual triode providing two stages of audio amplification. Can replace the 30's with 1H4's. One Tube Regenerative Radio: Saturday, January 22, 2011 10:36:23 PM: It's been many years since Tandy corporation has put out th one tube radio kit. I did find such an article online called "Build the Cyclops" which seemed to be exactly what he was looking for. In addition, the tube's gle- ments are physically large and the prin¬ ciples involved are simpler and easier to understand. Resources listed under Regenerative Receiver category belongs to Receivers main collection, and get reviewed and rated by amateur radio operators. Just start with a larger tickler and peel off turns. The regen radio was one of the many inventions in radio technology that was made by Edwin Armstrong. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to the superheterodyne's superior performance and the falling cost of tubes. Please practice hand-washing and social distancing, and check out our resources for adapting to these times. Neophyte-One Tube Regenerative Receiver Post by EFTB » Sun Nov 20, 2011 10:08 pm I am looking for a construction project/article from the early 70's that appeared in one of the electronic hobbyist magazines of that time. 0 MHz Music: MusMus http. Can replace the 30's with 1H4's. The tube, and all of the other parts except the crystal, seem to be available from Antique Electronic Supply. The finished radio is much su¬ perior to the beginner’s crystal set, yet is not much more difficult to build. A complete receiver circuit is shown. The information on this site is updated hourly, so if you are interested in one-tube radios for sale, bookmark this site so you can visit often. Arnaldo Coro Antich Sent: Friday, January 02, 2004 8:19 PM Subject: Re: Amended Schematic No mistake, in the version I am running right now the double stack pot takes care of fine regen control. Forums for radio builders and experimenters. It is my first attempt at building a one-tube regenerative receiver and it works pretty well on AM and CW. Constructed from re-cycled componentry. 1 MHz to 10+ MHz Receiver sensitivity: -130 dBm or 0. Low plate voltage too. 3 provides regenerative feedback. With this kit, you can power-up most, small one and two tube sets. This is probably the simplest radio receiver circuit that one could ever imagine of making. " As soon as I saw the article, I knew I. The tube, and all of the other parts except the crystal, seem to be available from Antique Electronic Supply. It is my first attempt at building a one-tube regenerative receiver and it works pretty well on AM and CW. For a photo, click the link at the bottom of the page and slect Foto for this project. Resources listed under Regenerative Receiver category belongs to Receivers main collection, and get reviewed and rated by amateur radio operators. Of course I had several ways I could go if I built a regenerative receiver into this. Most 6U8A regen designs use the pentode as the detector and the triode as an audio amp. 0 MHz Music: MusMus http. 5 inches x 6. Designed by amateur radio enthusiast Walter C. Get the best deals on Regenerative Radio when you shop the largest online selection at 1924 tube radio Crosley # 52 Regenerative Receiver w/ 3 tubes (good) C300. And most important, watch the videos that MIKROWAVE1 has uploaded. To my amazement, the radio worked on the first try so the next step was to find another TV tube that contains a rectifier and high gain triode in one package. Regenerative sets are a pretty common approach to a one tube radio design. 1942 One Tube "Beginner's Special" Receiver. This is an assembled regenerative AM broadcast band receiver kit, developed and sold by Lance Borden. That is the 20 pF trimmer capacitor across the coil. This link is listed in our web site directory since Thursday Apr 26 2012, and till today "A 12-Volt Homebrew Regen" has been followed for a total of 2706 times. 5mH Var Capacitor. The regen still makes a great contest radio. I had first encountered this book when I was a teenager. It is mounted just below/left of the RF tube. Although vacuum tubes were expensive at the time, some amateurs started experimenting with tube-operated regenerative receivers. The circuit. So that settled it, this little box was going to be a regenerative receiver. One of the reasons why super-regenerative receivers were so popular in the past was that a single device, e. 5 for B battery. 3 provides regenerative feedback. List - Gives frequencies used in many tube radios. By 1933 the arch-typical amateur set-up boasted a National SW-3, or reasonable facimile therof, and a curtain-rod Hartley feeding an off-center fed Zepplin wire. Seeking advice on regenerative receiver. Regen 14 MHz Receiver - From France (In English) Regen Receiver by Kees Talen - K5BCQ; REGEN Receiver Top. and this being my first regenerative receiver, was no exception. A regenerative detector is much more robust than any dual gate FET mixer, it is very sensitive to weak signals and it will demodulate AM in addition to single side band and Morse code. I had been acquiring parts for building this version of a 1930s ARRL Handbook Regenerative receiver for some time. The 3 Transistor Short Wave Radio illustrated in this article is a regenerative receiver design. Building an early 1930s-style 2 tube Regenerative Receiver. Buy It Now +$38. This one-tube radio comes from Homer Davidson's "Radio Receiver Projects You Can Build". Transistorizing of short-wave communications equipment is worthy of serious consideration. I can't find the article at the moment. Base cabinet is 18" wide x 11. Most parts are mounted on a printed circuit board that you get to make yourself. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to its superior performance and the falling cost of tubes. Kitchin, Charles. Report comment Reply. The antenna tuner has one small design quirk. Super-regenerative receiver for short range HF band applications 3 1. Homebrew Two Tube Regenerative Radio. After visiting a number of WWII museums in Normandy this summer I was inspired to build a radio receiver with the same technology and design as those used by the spies and the resistance during the French occupation. A REGENERATIVE RECEIVER FOR BEGINNERS A modern version of the classic re- generative receiver is shown in Fig 17. 00, 1 Tube Regenerative Kit. The basic paradigm of this design is to break up the traditional oscillating detector into a separated regenerative amplifier and detector circuit. iGen-Max Two Tube Regenerative Radio Kit ! (Version 4 - New for Jan 2014) Tube regenerative receiver based on original 1930's design, with a modern twist, Varactor tuning and a solid state audio amplifier. This site is designed to help you quickly and easily find the latest one-tube radios for sale. One Tube 12V DC Shortwave Regenerative Receiver - 12BA6 Regen Receiver. I included some notes there, most notably the resistor value to adjust for different coils. This little radio is the distillation of many circuits for one tube sets that have appeared since Edwin Armstrong invented the regenerative circuit in 1912. (Missing from this list is another one in QST, where he shows a crystal controlled regen receiver, intended for receiving code practice. The RadioBoard Forums. Regenerative: 17. A tendency to overload was one of the biggest drawbacks to the simple regen receiver design. The kit comes with a ten page pamphlet. Regenerative receivers are good but the real magic is in the super-regenerative receiver (which really should have an RF buffer amplifier in front of it). 0: 30,33: 62: Hear All Continents (HAC) One-Valve Regenerative: Towards the bottom of the page. A New York amateur by the name of Edwin H. Build this broadcast receiver from the early days of radio. A one tube regenerative receiver using a loctal type tube. A minimal antenna length would be about 6 feet, 15 feet would be a maximum. 1 Motivation The main motivation for using the super-regenerative receiver ( SRR ) is that it has simple architecture compared with other receivers. That is the record of the Radio Shop which has been swept from a tiny establishment in one room in the Bank of Italy to a large productive plant in Sunnyvale as a result of American's modern madness for "listening in". A D cell and five 9V transistor batteries wired in series will work to power this radio. Arnaldo Coro Antich Sent: Friday, January 02, 2004 8:19 PM Subject: Re: Amended Schematic No mistake, in the version I am running right now the double stack pot takes care of fine regen control. KW7WT's 3-tube Regenerative Receiver: Old 0-V-2 design. Back in the day, Radio had so called P Kits. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. Many tears ago I got my ham license because a group I was with required communication on 2meter 440. The antenna tuner has one small design quirk. Most any triode to pentode tube will work in a regenerative receiver. To my amazement, the radio worked on the first try so the next step was to find another TV tube that contains a rectifier and high gain triode in one package. In the 1930s the regenerative receiver was replaced by the superheterodyne circuit in commercial receivers due to the superheterodyne's superior performance and the falling cost of tubes. A 'Universal' Regenerative Detector that receives AM, SW, or FM! Oct 30, 2004 by Rick Andersen Here is an amazingly versatile circuit-- look closely and you'll see that it's really the same detector found in my article on the Superregen for FM VHF Aircraft. While it "received" stations, the sensitivity was poor, the aerial loading caused dropouts or changes in oscillation level, and of course the stereo/SCA. The circuit is in the 1937 and 1938 Handbooks. A D cell and five 9V transistor batteries wired in series will work to power this radio. Regenerative receivers have a long history in radio dating back to the first days of the vacuum tube. As a dedicated AC power supply enthusiast , I won't run a regenerative receiver without this isolation to prevent my leaked signal getting 60 cycle modulated and coming back into the receiver antenna port (the cursed common mode hum thang), or perhaps, making the local Hams irate with my QRM. The "top" 1/2 is. Although the superheterodyne receiver is the most common receiver in use today, the regenerative radio made the. Station Description The "First Receiver for the Novice" is a two tube regen. Low Voltage (12VDC) Two Tube Regen Receiver Using "Space Charge" Technology Before I go into the details, let me say that I've built about 1/2 dozen one and two tube Regens over the years (and several superhets) and this one is by far the most selective, most stable, and easiest to use Regen. I purchased the book (and I highly recommend it) and began work on the receiver. 5 for B battery. It is mounted just below/left of the RF tube. Only 20 left in stock - order soon. 7 MHz), with a receiver you build complete from the supplied chassis pieces, electrical components, and hardware. Since there are really two valves in one glass envelope, the set is really a two-valve receiver. A low mu tube works best, but medium mu tubes are ok. The regenerative receiver, regen radio was a popular form of radio receiver in the 1920s and 1930s. The regenerative stage is first, followed by a transformer coupled audio amplifier stage. 75" high x 8. Rockey, is directly mapping from value tube version. The receiver tunes the entire 30m band (10100-10150) and performs quite well. A 2000 ohm headset or an audio amplifier is required. Kitchin, Charles. One half of a 6AN8 tube serves as an RF amplifier and the other half as a regenerative receiver. Aug 18, 2019 - High Performance Regenerative Receiver - Ham Radio DIY Projects - YouTube. 50 Ever since we started mak- ing radio apparatus it has been our fixed policy to offer to the public the best possible receiv- ers at the lowest possible cost -. Tube: Radiotron UX200 (detector) in original carton. Here are some links to web pages with regenerative receiver circuits I find interesting for any one of several reasons General sources on homebrew receivers Dave's Homemade Tube Radios by Dave Schmarder, N2DS. One Tube Fm Super Regen Receiver 12bh7a 12v Dc Radio. The regenerative radio was developed by Edwin H. The One Tube Wallop probably does as the title says. All Product Information Customer Q&A's Customer. Ham Radio Equipment Dj Equipment Radio Design Antique Radio Electronics Gadgets Audiophile Mason Jars Tube Product Launch. Search for Crystal Radio Sets, Regenerative Circuits, One Tube Regenerative Receivers, The Evolution of Radio Technology, etc. ranickel 596 views. Homebrew Two Tube Regenerative Radio. W1FB Doug DeMaw's Two-stage Regen from his Design Notebook - Unsuccessful. Super-regenerative receiver for short range HF band applications 3 1. The most used spy radio transceiver during WWIII was the "Paraset" which used a regenerative two-tube receiver, one tube for the detector and the other for audio amplifying. One Tube FM Super Regen Receiver - 12BH7A 12V DC Radio - Duration: 4:05. It was made to match the 2-Step Amp. This receiver uses a 2N4416 JFET (orJ31()), which provides a more sensitive detector than an MPF102. In addition to the tube and plug-in coils, it includes a tuning capacitor, a variable resistor for the regeneration control, two fixed capacitors, one fixed resistor, and one RF choke. The part count is low and the sensitivity is quite remarkable. Best one-tube design that I have encountered so far. Just one or two transistors and maybe a simple audio amplifier using one integrated circuit. Transmitter / Receiver Schematics and Parts Lists 1957 ARRL Handbook (34th Edition) Typical Regenerative Receiver Circuits, Page 90; Schematic A One Tube Regenerative Receiver (6U8) Page 113. Constructed from re-cycled componentry. The QRPGuys K8TND Regenerative Receiver covers the 60, 49, 41, 31, 25 meter shortwave bands (approximately 4. The Circuit. Just start with a larger tickler and peel off turns. One of these was a regen receiver (Science Fair brand Three Transistor Shortwave Radio (Catalog #28-110)) Great fun to listen to n the summer night - wire in the air and ground hooked to the outdoor faucet. It may not be a Hi-Fi receiver, but very easy build for sure. This is the "Improved" version that came out in the publications several months after the original Cockaday circuit. Homebrew Radio ex-Silicon Tagged: homebrew radio Regenerative Radio (before Battery Powered Tube Homebrew Shortwave 12bl6 One Tube Regen Radio Receiver Auctions - Buy And Sell - FindTarget Auctions Regenerative radio using one Tagged: ham-radio vacuum tubes 2 tube shortwave radio:. Complete Details Before you buy, download the manual (1. Figure 1a: VLF-LF Receiver, Regenerative RF Section The single tuned circuit is made up of the paralleled sections of 3 gang tuning capacitor C8 and one of the switched inductors L3, L4, L5, or L6. Armstrong invented the one-tube regenerative receiver in 1913. 0: 30,33: 62: Hear All Continents (HAC) One-Valve Regenerative: Towards the bottom of the page. Most of this reputation is due to design short cuts that have been implemented over the years. A 2000 ohm headset or an audio amplifier is required. This site is designed to help you quickly and easily find the latest one-tube radios for sale. The super-regenerative receiver is based upon the regenerative receiver shown in Figure 1, while both depend for their operation upon that property of the audion--the three-element vacuum tube--which enables it to reproduce very faithfully in greatly amplified form any feeble pulse of electrical energy which is fed into it. Report comment Reply. Seeking advice on regenerative receiver. The LM386 seems OK in my book. Any antique radio aficionado will love owning one of these elegant, historically accurate regenerative radio receivers. [1] The receiver uses a single vacuum tube for both amplification and detection, utilizing positive feedback to both increase the gain from a single vacuum tube and to improve the selectivity of the receiver. And most important, watch the videos that MIKROWAVE1 has uploaded. Regenerative receivers are good but the real magic is in the super-regenerative receiver (which really should have an RF buffer amplifier in front of it). 75" high x 8. Radio detector circuits take a variety of forms. 1 mm jack for external 12v input or 9v on board battery. The circuit is based on a design by EN Bradley for a pocket one-valve receiver, which used a 3A5 (DCC90) valve. When I take this guy to the Hamfests and operate it on my swap table, I always draw a crowd with it. I had a brand new, black powder coat chassis that I had gotten at a hamfest years ago that would serve as the chassis. Regenerative Receiver from 1950 Boys Life Magazine. This is probably the simplest radio receiver circuit that one could ever imagine of making. Some Regenerative Receivers. FS: RAL-7 regenerative receiver w/ solid state PS - P/U only near Denver, CO. As a dedicated AC power supply enthusiast , I won't run a regenerative receiver without this isolation to prevent my leaked signal getting 60 cycle modulated and coming back into the receiver antenna port (the cursed common mode hum thang), or perhaps, making the local Hams irate with my QRM. The information on this site is updated hourly, so if you are interested in one-tube radios for sale, bookmark this site so you can visit often. Fall 1995, pp 7-26. Rockey, is directly mapping from value tube version. KW7WT's 3-tube Regenerative Receiver: Old 0-V-2 design. This is the later version of the Ace V. Since I was a budding amateur radio operator at the time, I needed a good receiver if I was ever going to get on the air. Shortly after inventing the regenerative receiver, Armstrong started working on the superheterodyne receiver which replaced the TRF radios for broadcast receivers around 1930. A regenerative receiver, by contrast, could often provide adequate reception with the use of only one tube. One tube regen from Morgan's First Book of Radio : Page 1 of 2 [ 23 posts ] Go to page 1, It is the one-tube regen set in Morgan's "Boy's First Book of Radio. 20 shipping. 15 watching. Building Notes for Tube Type Regenerative Radios by Dave…. The Circuit. Requires two T-1T4_DF91 tubes (not included). January 2020. Andrew November 14, 2018 at 11:41 am. It uses home wound coils to cover both 80 and 40 meters. Super-Regenerative Receiver 1; System 5; T.