Regenerative Tube Radio

A Fig 1: The assembled Shortwave Radio Kit Introduction The SHORTWAVE RADIO KIT (#SWRAD) from MTM Scientific is a complete parts kit for building a shortwave radio. For You Explore. Welcome to the Crystal Set Radio site and the One-Tube Radio resource page. Kit features a wide band rf amplifier stage. regenerative radio made the most out of very few parts. In radio's early days, vacuum tubes were inefficient and expensive. Regenerative Tube Radio Building Notes by David Schmarder. One Tube Regenerative. Valve (tube) and Transistor with information/projects and technical help. 2 4/5/2016 Page 4 of 47 Introduction - Note from Doug Posted to the Web April 21, 2009 I have always had this love affair with Regen Radios. :) They are pretty much. The logical first choice was to start out with simple regenerative circuits. AM tube microtransmitter discussion. Armstrong and patented in 1914. Or maybe you just want to learn how valves work, but are afraid to tackle a mains powered set, then try this battery powered kit, it is a great way to learn a new hobby!. of two, portable, radio receivers. 5 MHz short wave. Usually constructed from recycled components, these design's offer good sensitivity and can be tailored to cover MW bcst band or HF spectrum by winding suitable coil(s). One of the later versions used the following layout: -Converter tube:. It featured one stage of RF amplification with a 6L7 tube, a 6J7 serving as regenerative detector, and a 6C5 serving as audio amplifier. 12AV6 Vacuum Tube Radio Grid-Leak Detector Low Voltage Vacuum Tube Radio. regenerative receiver, one of the most famous radio inventions, maintaining a long litigation in the courts with the inventor of the Audion. Hiker's Two regenerative receiver. It uses the best features of many one-tube sets and has features not found on most radios of its type. Free Tube Regenerative Shortwave Radio Kit by Franzis New 3. Includes a painted and silk screened chassis, circuit board and all parts. Inter­nal­ly, the chas­sis was near­ly the same as the old Mod­el 84, except for the use of four octal-based tubes in place of the stan­dard-based tubes used pre­vi­ous­ly. It's called the KRC-2. That was exciting. A generalised schematic diagram of a regenerative radio is shown in Fig. A 12-volt, homemade tube regen, for starters. Add a buffer ahead of it, so the antenna doesn't affect Regenerative Radio. One Tube Regenerative Radio Kit. The regenerative receiver, regen radio was a popular form of radio receiver in the 1920s and 1930s. 00, Two Tube Regenerative Radio Kit. 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. The antenna tuner has one small design quirk. "Build me the simplest possible radio receiver," was the order that came down the line from the Big Chief, who continues, "Just imagine yourself on a desert island with only a standard radio tube and little else for constructing the set. As a result this form of radio deserves its place in this summary of the different types of radio available. There are plans in 1956 QST by Don MIx in 1956 with 2 X 6DQ5 tubes as well as the "First Receiver for the Novice"; a 6SJ7 regenerative detector is followed by a 6SN7 dual triode providing two stages of audio amplification. It follows the classic one-tube radio design from years ago, but has a modern feature or two. Figure 1203 : Tube Regenerative Radio. com with free online thesaurus, antonyms, and definitions. See more ideas about Ham radio, Electronics and Antique radio. United Kingdom. regenerative feedback. 1 of 6 A Simple Regenerative VLF-LF Receiver by Lloyd Butler VK5BR (Originally published in "Amateur Radio", January, 1992 ) Introduction In an earlier issue of of Amateur Radio, I described a superheterodyne receiver for the VLF-LF bands, This was followed by a series of. QRP Kits "Scout Regen" SW Regenerative Receiver Version 1. ANTIQUE CROSLEY MODEL 52 REGENERATIVE TUBE RADIO In PERFECT WORKING ORDER WITH GOOD GLOBE STYLE 01-A & 00-A TUBES INCLUDES :. 7MHz and used as an IF amplifier. For You Explore. Regenerative Receiver for 6 to 17 MHz · navAID Figure 1036 : Regenerative Receiver for 6 to 17 MHz. Radio Kit - 2 Tube Regenerative Radio - This radio kit will cover the AM radio band along with the SW radio band. I would like to build a regenerative shortwave tube receiver using the 1U4 and 3A5 battery tubes. For this episode we are joined by Will Vogl, founder of The Vogl Homestead Farm LLC. camp, he came into the possession of a 1-tube regenerative radio receiver improvised by an officer of the Engineer Corps, Capt. You may connect it to amplifier and computer sound card to access the playback, that expand the scope of application of the radio. Where I don't want to slog through in a half-understood language, I use Google's translation page. It tunes about 470 - 1900 kHz, allowing reception of signals on either side of the AM broadcast band. I just picked up a box of electronics at an estate sale. The regen radio was one of the many inventions in radio technology that was made by Edwin Armstrong. Ham Radio Corner This is a new feature added to Fun With Tubes. Power for this receiver is 1. 1-tube regenerative receiver page! This project was my first regenerative radio receiver and one of my favorites as well. Japan Radio Museum internet Museum is here. The regenerative circuit (or self-regenerative circuit ) or " autodyne " allows an electronic signal to be amplified many times by the same vacuum tube or other active component such as a field effect transistor. Regenerative receivers have placed a vital role in the field of radio communication like in radio repair where the broadcast radio signals are monitored, as interference source identifier, in adjustment of oscillators, and in amateur radios. I was a bit turned off at the thought of having to build a 90-250V DC supply (or lots of 9v batteries) just to experiment, so I took a look at the tube data available online. Complete Details Before you buy, download the manual (2. This is the news release from GE that started it all, way back in July, 1960. See more ideas about Ham radio, Electronics and Antique radio. I've tried to list links where there is (1) a picture, and (2) a schematic. The most interesting thing is that the two tubes that GE's engineers promise in the news release (and are said to be available in sample quantities) never went into production, as best I know. This page shows Jack's one tube BC-221 regenerative radio project. The "First Receiver for the Novice" is a two tube regen. 10Mc - 15Mc L3 2t L1 11t tapped at 5 from ground. Nov 1, 2019- Explore receiverv's board "Regenerative receiver" on Pinterest. It had no tuning capacitor, it brushed a metal contact across a copper coil where the varnish had been sanded off with sand paper. This is an assembled regenerative AM broadcast band receiver kit, developed and sold by Lance Borden. Just one or two transistors and maybe a simple audio amplifier using one integrated circuit. com with free online thesaurus, antonyms, and definitions. 12AU7 REGEN' RECEIVER USING 12 VOLT HT SUPPLY Inspired by the references below, this is my build of the design described by John Hunter on his website (Ref 1), and Peter Parker in his youtube video's (Ref's 2 & 3). The tube set includes a 6AU6 preamp, a 5763 driver and a 6L6GC power amp. 5, by a zener diode regulator of a 28 volt system connected in the field circuit of the exciter. 1920's Crosley Trirdyn This is a 1920's Crosley Model Trirdyn AM regenerative receiver. This project involves the construction of a one-tube ham radio QRP (low power) transmitter for the 80 meter or 40 meter band. 1920's Radio Parts and Test Equipment Tuning condensers, coils, tube sockets, etc. Five plug-in coils sold separately increase the coverage from 165 KHz to 35 MHz. Radio Shop Receiver. The coil was removed from the set and a new coil was wound on the same coil form. Hello fellow radio builders or to be builders. A Depression-era 3-tube regenerative receiver 5/22/2015 This rather odd looking receiver is a near-replica of a receiver described in the 1936 edition of The Radio Amateur’s Handbook. I will post pictures and a better description when I have done so. Just one or two transistors and maybe a simple audio amplifier using one integrated circuit. He then went on to produce several low-priced, attractive models, and by 1922, Crosley was wealthy and his company was the largest radio manufacturer in the world. A dial fashioned from a plastic foot was glued to the top of the potentiometer, finishing the radio. Odds are that the antenna will be a poor match, so actual radiated power will be lower. Bill Harris' restoration projects, radio repair tips, an article about how the Rural Electrification Authority gave rise to the popularity of radio in rural America, a history of the NBC network identification chimes, and a cross-referenced directory for matching radio brand names to the name of the actual manufacturers. This sort of circuit is an excellent "first try" at a space-charge tube radio. After building a couple dozen regenerative tube radios, I have learned some lessons. The regenerative circuit (or self-regenerative circuit ) or " autodyne " allows an electronic signal to be amplified many times by the same vacuum tube or other active component such as a field effect transistor. This Elmer Osterhoudt design was introduced in 1953. 5Mc L2 4t L1 20t tapped at 7 from ground. It follows the classic one-tube radio design from years ago, but has a modern feature or two. e from top of 100Mhz to around 150Mhz. The website seems to be down. Regenerative radio chassis should be robust and structurally sound, because flimsy physical construction allows for subtle movement in critical components like the tuning capacitor and tuning coil. Here are: 1) The "6U8" regenerative receiver. with schematics on-line. 2,079 Likes, 12 Comments - DIY Electronics Richard (@codingheroes) on Instagram: “🇺🇸 Mini receiver with tubes. ECC81 tube radio posted in electro on September 20, 2012 - 5 Comments I’ve seen a lot of circuits with tubes at low voltage ( max 20V ), so I wanted to experiment with one too,… and what could be more fun to play with than a radio. I built three of these radios so far, and each one averaged two afternoons of construction time. I understand that the first edition of the book used the 1H4 tube. United Kingdom. This kit will allow you to build a shortwave radio for listening to worldwide. Course EK-2B continued the course and expanded the radio to a 6-tube 2-band superhet receiver that could receive the AM broadcast band and shortwave from 3 to 10 MHz. [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. I know this is a very vague description of the project. A High Performance Regenerative Radio September 30, 2012 August 4, 2015 raycharlesring RF I have built countless regenerative radio circuits throughout the years and some have worked well - some haven't. For this episode we are joined by Will Vogl, founder of The Vogl Homestead Farm LLC. PCB Radio MW 6 Transistor S-065 Saturn; PCB Radio MW S-708 Saturn; PLL With HEP4059; Power Bank Solar Cell; Power Supply 20 A; Pre amp GaAs FET; Radio Bekas; Radio KIT 708; Radio National R 4250 Y; Radio National R 4250 Y Bekas; Radio National R 4250 Y NOS; Regenerative Receiver for 6 Mc - 17 mc; RX FM 144 Mc PU2XJE; Satelite Finder; Schema. I used a 3SK45 but a 40673, 3N201, 3SK88, BF961, BF981, or any similar device should be suitable. The logical first choice was to start out with simple regenerative circuits. Synonyms for regenerative at Thesaurus. Regenerative Tube Radio Building Notes by David Schmarder. The filaments are wired in series and the whole lot is run from a 12 volt gel battery. Included in the virtual museum are hundreds of pictures, images, and descriptions of antique radios, articles, FAQ, Sell, and Buy a radio. Armstrong, 1914, invented the principle of regeneration. Borden Radio Company has a range of crystal set radio kits, tube Radio kits, vintage style radio kits and other related parts. 3 volts regulated direct voltage for the filaments and between 50 to 75 volts also regulated for the high voltage. This page contains a little information about us and our crystal set activities. Building a regenerative tube receiver seems to have been a rite of passage for all hams of yesteryear. Of course, a tube provides both RF gain by Q-multiplication and also audio gain of the grid-detected signal. Just one or two transistors and maybe a simple audio amplifier using one integrated circuit. However, it works best with the tickler connected as shown in the schematic, and there is a. Low-cost alternatives call mainly for homebrewed radios, and in this sense, the regenerative receiver is the common choice due to its simplicity, low parts count and very acceptable performance. For the contest, I settled on one of the first RF transformers I wound, and my contest radio performed superbly. G0TLA's Wonderful Page of Amateur Radio Projects (some with tubes!) Ken's Hartley Oscillator 813 transmitter plans, regenerative receivers etc. The audio amp was rebuilt on a piece of punch-board, this time using NOS Philips BC547s which aren't quite as good as the devices used in the breadboard test, but which worked fine. They sell eggs from pasture raised chickens, organic fed pasture raised while chickens, beyond organic no-till vegetables, and soon to have sheep. Has power on and off pushbuttons, and circuit shuts off power when the battery voltage goes too low. It has a BFO and speaker. 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. I know you old regen folks have been through this before, but maybe new builders can gain some insight from reading about this project. We will reply you within 48 Hours. Each radio kit contains painstakingly collected top-notch vintage parts, wire, detector, high-quality vintage headphones, hardwood box or base, and instructions and schematic for a superior, time-honored circuit, etc. The transition from oscillation is very smooth. A non-regenerative one-tube receiver with condenser tuning is shown in Fig. RF Cafe visitor David M. Steve Yates - AA5TB HOME. Tube Radio forum. I had been building my 1625 tube radios for a while and I felt it was time to offer a different project. List - Gives frequencies used in many tube radios. The tickler coil provided additional feedback at the higher frequencies. Some of them have been difficult. You get all the components, a high quality silk screened circuit board. Super-regenerative receiver for short range HF band applications 5 2 Technical Introduction Edwin H. Advancing regenerative medicine therapies Cook Regentec is focused on developing research and clinical tools to advance regenerative medicine therapies from the lab to the patient. Ever since I was a kid huddled in front of an old console radio my grandmother gave me, I've been fascinated with the notion of listening broadcasts originating half-way around the world. This is fitting because such circuits commonly require several to tens of volts of local-oscillator (LO) drive at a high impedance. Well, that's what I ended up building, an Armstrong type regenerative radio, but unlike the regenerative radio I built in 1958, this time I decided to use 1970s technology instead of 1920s technology and use a Field Effect Transistor (FET) in place of the venerable old 1H4 thermionic tube that I used as the detector of that early project. At one point I had a schematic that was sent to me by an OM in VE land but I misplaced (lost) it. The new coil has 21 turns, a tap, and then 61 more turns, for a total of 82 turns. Radio Shop Receiver. camp, he came into the possession of a 1-tube regenerative radio receiver improvised by an officer of the Engineer Corps, Capt. Borden Radio Company - Radio Kits and Designs for Old and New Styles. Inter­nal­ly, the chas­sis was near­ly the same as the old Mod­el 84, except for the use of four octal-based tubes in place of the stan­dard-based tubes used pre­vi­ous­ly. 1) The Jones "One-Tube" Regenerative Receiver. Kit tunes AM/BC band to approximately 8. Radio Battery switch (RBS). It was identical to the one shown on this page. It was a 2-tube (triode) regenerative set. Frank Jones has a 222 that is really something. Designed by Charles Kitchen, N1TEV http://www. Here's the product description: 1 - 30 MHz with band spread tuning. It consists of an amplifying vacuum tube or transistor with its output connected to its input through a feedback loop, providing positive feedback. I did some more searching on google and found a site that is actually for crystal radio enthusists but also has a kit that can be purchased for building a 1 tube regen receiver that receives signals from the broadcast band thru 8. Many sets operated from batteries, and fewer tubes meant longer battery life. I would like to build a regenerative shortwave tube receiver using the 1U4 and 3A5 battery tubes. It had no manufacturer name or model number on it. The controls are (left) regeneration, (lower center) filament rheostat, (right) tuning capacitor. This radio is built on a solid wood base with an engraved faceplate. Regenerative medicine has the potential to provide innovative new therapies for people with lung diseases, including chronic obstructive pulmonary disease (COPD), pulmonary fibrosis, cystic fibrosis, pulmonary arterial hypertension and bronchiolitis obliterans. Haynes, Radio World, 1936. Single lamp fm dc tube radio. RECEIVER, ONE TUBE. This is a reproduction of a two tube regen offered in kit form by Western Radio of Kearney, NB in the 1950's. It is a broad coverage (250kc - 16Mc) regenerative receiver, made basically with just one 6AF11 compactron tube and four plug-in coils. I didn’t build Morgan’s one-tube radio, but I’ve always been intrigued by the simplicity of the regenerative receiver. In the particular edition that I have, he uses a 6BF6 which is still available if you look hard enough. A D cell and five 9V transistor batteries wired in series will work to power this radio. Regenerative sets are a pretty common approach to a one tube radio design. 12AT7 Super-Regenerative Receiver - Micro FM Tuner. One 12 volt supply can power the filiments and the tube bias through this supply. These include tube portables, such as the Zenith model K-401 shown below, and "farm" radios, which were used in rural areas where there was no other source of electrical power. An antique radio is a radio receiving set that is collectible because of its age and rarity. Vintage and Crystal Radios for sale Some quality homebrews and reproductions. It performed quite. However, the modern superheterodyne (superhet for short) can be built as a one tube radio as well. This design uses the triode as a tuned grounded-grid RF amplifier ahead of the pentode detector section. operated, "Regenerative Shortwave Receiver". The tube is located on the top of the radio, so you can watch the glowing tube while listening. Regen 14 MHz Receiver - From France (In English) Regen Receiver by Kees Talen - K5BCQ; REGEN Receiver Top. All of this is accomplished with two plug in RF coils. This could be supplied by batteries, but it is much easier to use a filament transformer. /help --with 2 simple circuits-- I The receiver is a super-regenerative receiver and needs a strong enough signal. using one 1A2 vacuum tube. The circuit is simple. It uses a second lower frequency oscillation within the regeneration loop that interrupts or quenches the main RF oscillation. Highly stable and reliable, 1W metal oxide/carbon film resistors are "favourite replacement" for carbon composition resistors. R3/C5 are a "grid leak" arrangement that (together with R4) sets a very high level of oper- ating bias for the JFET, making regen- eration control much smoother. Regenerative sets are a pretty common approach to a one tube radio design. Shortwave Regen Tube Radio #3 Back. Old Time "Interflex" Radio Receiver JPG Files. That is inherent in a simple regenerative receiver circuit. This design is very similar to RCA's A. Doerle "sets" were a popular home built regenerative shortwave receiver of the 1930s. This simple regen radio uses a single tube as it's detector and amplifier; the "Audion". See the links below for an article by him. We will reply you within 48 Hours. This page shows Jack's one tube BC-221 regenerative radio project. Regenerative receivers needed far fewer tubes and less power consumption for nearly equivalent performance. Or maybe you just want to learn how valves work, but are afraid to tackle a mains powered set, then try this battery powered kit, it is a great way to learn a new hobby!. Unfortunately the "Radiodyne" trademark was already held by Western Coil, so Atwater Kent was forced to discontinue the unit. Regenerative receivers provide a surprising level of performance with only a handful of components. If you like designing your own sets, this page is for you. They offered a number of low priced simple kits. Regenerative radio receiver For other uses, see Heat exchanger#Regenerative heat exchanger. Even as far back as 1958 I knew that my Armstrong tube radio was far superior to any of my simple crystal radios, but now I had this excellent CR1 crystal radio at my disposal so that I could now compare a good crystal radio to a simple regenerative radio. , President CINCINNATI, OHIO. Radio Kit - 2 Tube Regenerative Radio This radio kit will cover the AM radio band along with the SW radio band. We do some limited restoration work, and costs vary upon the amount of work needed to get items into functional condition. The 6SN7 tube requires 6. Radio, 1997, 04, p. Diy Kit Super Regenerative Fm Tube Radio Circuit Receiver Module 88mhz-108mhz S9. It was identical to the one shown on this page. 5 watts output so you don't need to use headphones. The Scout Regen receives CW, SSB and AM signals from 3. 00 including the "WD-11" vacuum tube. It consists of an amplifying vacuum tube or transistor with its output connected to its input through a feedback loop, providing positive feedback. Some of them have been difficult. Hi! I would like to build an FM tube radio (not super regenerative). Osterhoudt Design Here is a One Tube Regenerative All Wave Receiver Kit from Modern Radio Labs. Zener diode DI regulates the drain. Radio Battery switch (RBS). Build a 6m AM Transceiver! 1999-style project! Get the file named 6M_AM. This set uses screen grid voltage regeneration control. He would rather go for a homebrewed radio, being a regenerative receiver an affordable choice. Welcome to the Crystal Set Radio site and the One-Tube Radio resource page. 25L6G REGEN RADIO (AM + 630M + SHORTWAVE) WORKS GR. Note:This item is DIY Kit. This sort of circuit is an excellent "first try" at a space-charge tube radio. Here are a few examples. Regenerative circuit From Wikipedia, the free encyclopedia The regenerative circuit(or self-regenerative circuit) or "autodyne" allows an electronic signal to be amplified many. Hutchinson, who had built it of scrap parts and placed it inside a GI canteen. receive fm band 88-108mhz. Shortwave Regen Tube Radio #3 Back. Something you might want to bear in mind if you ever do build a regen for use in amateur radio: in order to get the. Eddy Insam dispels the magic and explains the details. Thanks 73 Fred wb6iiq. 12AU7 REGEN' RECEIVER USING 12 VOLT HT SUPPLY Inspired by the references below, this is my build of the design described by John Hunter on his website (Ref 1), and Peter Parker in his youtube video's (Ref's 2 & 3). 26 gauge wire was used, same as the original. Thus it achieves sensitivity far beyond what only a detector could alone. Borden Radio Company - Radio Kits and Designs for Old and New Styles. Radio Constructor December 1959. with schematics on-line. A Simple Regenerative VLF-LF Receiver by Lloyd Butler VK5BR (Originally published in "Amateur Radio", January, 1992 ) Introduction In an earlier issue of of Amateur Radio, I described a superheterodyne receiver for the VLF-LF bands, This was followed by a series of articles on front end tuning and loop aerials for these bands. You have to work with them. Borden Radio Company has radios in both older and new styles. Flechette Radio Frequency Lumbar Pain Relief How To Get Instant Relief From Migraine Pain Best Relief For Stroke Caused Hand Pain. They usually don't work perfectly on the first try. tested good with this radio). This project involves the construction of a one-tube ham radio QRP (low power) transmitter for the 80 meter or 40 meter band. Vintage Electrical Appliance Vintage radio - phonograph - television discussion forums Tube Radio Forum - The friendliest radio forum on the net! Vintage radio - phonograph - television discussion forums. 3 V AC or DC. I built three of these radios so far, and each one averaged two afternoons of construction time. This is a similar circuit on 49 meters --->Dave's Homemade Shortwave Tube Radio Using The Well Known 1T4 Tube In A Regenerative Circuit The 1t4 tube is a Remote Cutoff Pentode. A 2000 ohm headset or an audio amplifier is required. A D cell and five 9V transistor batteries wired in series will work to power this radio. Both tubes have otherwise identical performance and connections. The 6SN7 is larger and more rugged than the miniature dual triodes such as the 12AU7 and the 6CG7. for both the filament and plate supply. DUAL 12AU7 Regen Radio. An antique radio is a radio receiving set that is collectible because of its age and rarity. , receiver, regen radio, regen receiver, regeneration, regenerative, tube radio, tube receiver. They offered a number of low priced simple kits. We also are now offering a parts kit to build the radio, see below. So this design, getting most gain out of one tube, filled the needs of the growing radio community and immediately thrived. However, RF voltage can burn large holes in your hand. txt) or read book online for free. Tube FM Radio FM Super-regenerative Handmade Nostalgia Radio Tubes Amplifier Circuit structure: a super-regenerative type vacuum tube + low-frequency. Dec 21, 2014- Explore wG0AT's board "What's Regenerative Radio", followed by 206 people on Pinterest. Make the regen solid, like a VFO (which it really is). Regenerative receivers have a long history in radio dating back to the first days of the vacuum tube. DIY Kit Super Regenerative FM Tube Radio Circuit FM Receiver Module 88MHz-108MHz | Vehicle Parts & Accessories, In-Car Technology, GPS & Security, In-Car Entertainment | eBay!. We can work with just about any schedule we need contact within 48 hours with payment intentions payment is expected within 4 days of invoice. This kit contains 600 high quality flame proof resistors 24 each of the 25 most often needed pre-WWII resistor sizes used in vintage tube radios. Power for this receiver is 1. This could be supplied by batteries, but it is much easier to use a filament transformer. The "First Receiver for the Novice" is a two tube regen. Vintage Tube Radio & MP3 Upgrade: This i'ble will take you though the restoration of a vintage tube radio to near-original condition and in the process, upgrade it to play to MP3s with a low cost, easy to build AM transmitter. It uses the best features of many famous one tube sets and has features not found on most radios of its type. Regenerative Receiver is a curation of 24 resources about , A 12-Volt Homebrew Regen, Designing Super-Regenerative Receivers, Small Portable Regenerative Receiver, High performance regenerative. Below, you will find a list of all shortwave radio kits categorized by manufacturer. It employed a 1D8GT tube with its triode section serving as a regenerative detector and its pentode section as an audio amplifier. The "First Receiver for the Novice" is a two tube regen. 5 V DC for the filaments and 45V DC for the plate current. R3/C5 are a "grid leak" arrangement that (together with R4) sets a very high level of oper- ating bias for the JFET, making regen- eration control much smoother. This configuration allows extracting useful signal with much improved performance compared to conventional regenerative receivers. UpTone Audio USB Regen Measurements. We call this the Pine Board Project for a reason and that’s because we will actually be building a transmitter on a pine board, so you can see the circuitry. Among his many inventions are Regenerative and Super Regenerative receivers, the Superheterodyne circuit, and FM radio. I have put the Hallicrafters S-85 on hold for a while and will be attempting to build a three tube regen set using 01A tubes ( actually I will be using 01B tubes since they take half the filament current compared to a 01A’s so longer life on the A battery ). For those of my friends tube radio builders, who asked me about "Soviet novice transmitter", "XUSSR QRP TX" (as it pronounced in telegraph),"something authentic, but not too complex" etc, such a RIG should be a good choice - easy to build and clearly adjustable design, small amount of widespread parts, a lot of potential operational fun (two. 'A Personal Portable Receiver' by James Sinclair. It's only 5 years after from world's first radio broadcasting in U. Buyers need their own welding assembly. Course EK-2B continued the course and expanded the radio to a 6-tube 2-band superhet receiver that could receive the AM broadcast band and shortwave from 3 to 10 MHz. 3) The "Meissner Midget" receivers. REGENERATIVE SHORT WAVE RECEIVER. Apparently at some point in the early 1930's, they retailed a few radio models that were manufactured by Gilfillan with the Dow name on them. pdf) or read online for free. Crystal-Tube Receiver From Junk-Box Parts for Beginners Page 1 Page 2. The JitterBug is intended to reduce the level of radio-frequency (RF) noise on the balanced data connection, the 5V power bus, and the ground connection. 3 volts regulated direct voltage for the filaments and between 50 to 75 volts also regulated for the high voltage. Select picture or schematic to display from thumbnails on the right and click for download. Two Tube Superheterodyne Receiver and the regen still worked. Regenerative radio chassis should be robust and structurally sound, because flimsy physical construction allows for subtle movement in critical components like the tuning capacitor and tuning coil. A D cell and five 9V transistor batteries wired in series will work to power this radio. The Receivers I. Note: the tube FM radio adopted an ancient technique and don't have high sensitivity of IC FM radio, please do not compare with modern digital radio technology, if you mind the ancient technique of FM radio, please don't buy it. How do we achieve this? The regenerative stage is fixed at 10. I used a 3SK45 but a 40673, 3N201, 3SK88, BF961, BF981, or any similar device should be suitable. The "First Receiver for the Novice" is a two tube regen. Welcome to the Birmingham, Alabama Crystal Radio Group website. From the Antique Radio Forum: Regenerative: 15. Eighty years ago, the SWL shown here was exploring the ether with her three-tube shortwave set, as featured in the February 1936 issue of Shortwave Craft magazine. This design uses the triode as a tuned grounded-grid RF amplifier ahead of the pentode detector section. The part count is low and the sensitivity is quite remarkable. Chapter 5: The New Regenerative Radio Replacing the Tube in an Old Circuit With a Transistor Regenerative Radio Configurations Block Diagram for All Regenerative Radios The Regenerative Amplifier The Interim Amplifier The AM Detector The Audio Power Amplifier Chapter 6: Other Circuits Using the Regenerative Principle RF Oscillators Rudimentary. 5 mH RFC, I can get a 27 mH unit off Dave's web store, is there any reason to think that would work?. as the manufacturer of a 1-tube regenerative receiver in that. How to use it: this radio has a regenerative topology, which means that it uses some components (P1 and L3) to feed back a fraction of the voltages coming out of the amplifier so that they add with themselves. 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". One 12 volt supply can power the filiments and the tube bias through this supply. WD5HOH Regenerative (REGEN) Radio Receiver This web page describes a small, single tuned circuit regenerative receiver primarily for daylight reception in the 16, 19, 22 and 25 meter international shortwave broadcast bands. Aparently it was used as an RF amplifier and an audio amplifier. I have always been fascinated by antique radios. Its just another way to conceptualize a regenerative radio. vintage homebrew radio circuits. 9Mc - 4Mc L2 8t L1 28t tapped at 8 from ground. 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. radio kits in ja 信州の田舎発ラジオ工作(自作とキット)中心blogです。 トランジスタラジオキット,真空管短波ラジオ(自作)、真空管レフレックスラジオ、自作amワイヤレスマイク、fmワイヤレスマイク(真空管)、ダイレクトコンバージョンキット製作 など計 324例。. so HERE WE ARE! NOTE: It was originally intended to use 12AT7's, but I had a couple of 12AU7's, so I used those, instead. I have a simple MOPA transmitter and would like to build a simple RX to go along with it.