Circuits Transceivers One Tubes

Circuits Transceivers One Tubes
1944 One Tube VHF Transceiver QST, October 1944. At OneTubeRadio.com, we'e always looking for one tube radios, and seventy years ago, QST carried these circuits for a one-tube AM transceiver for VHF. Since the war had Amateur Radio shut down for the duration, this circuit was designed for WERS on 112 MHz.
The control grid is the common element in the two circuits, and they are only coupled by the common electron stream within the tube. This is why the circuit is known as an "electron-coupled oscillator".
In the end, a conventional crystal oscillator circuit was used (Tuned Plate/Tuned Grid) with a single 807 beam-power tube. For maximum flexibility, a pi output circuit was added, although this did increase the parts count by one. For simplicity, a dynamotor was used in the power supply. A circuit diagram is attached to this report. 4. Parts.
I built up a second circuit almost identical to the one shown, but in receiver configuration. I can tune both units and the transmitter antenna, and can hear the transmitted signal loud and clear when the receiver has an antenna wire directly connected to the grid side of the coil, and said wire is directly next to the transmitter antenna.
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 the best features of many one-tube sets and has features not found on most radios of its type. One feature is the capacitor coupling of the audio ...
The Eilen Radio HF-19 One-Tube Transceiver operates on the 5 to 10 meter band. It requires two dry batteries and 90 to 135 B voltage. It was available as a kit or factory wired. Price in first year of sale 3.95 USD Mentioned in Short Wave Craft August 1936 page 231. Author Model page created by Wayne Childress. See "Data change" for further ...
Tube Transmitters/Receivers Introduction Many hams fondly remember their first homebrew transmitter--it is hard to forget the warm glow of a vacuum tube. With the availability of New Old Stock (NOS), it is quite practical for hams to recreate that first radio!
1-Tube AM Broadcast Transmitter 2023-02-04 Note: I advise anyone contemplating building this transmitter, that this was my very first transmitter design, and while it works well, I've since come up with simpler transmitter circuits that perform just as well. For example The Improved One Tube Transmitter.
A couple of years ago, I actually did build a one-tube radio. I never actually made a contact with it, but this was actually a one-tube transceiver for 80 meters.
The path for that "pull" is from cathode to anode, the grids just control the instantaneous resistance of that path. You can read more about how a tube (or transistor) drives a tank circuit on this page. Because of the tube acting like a variable resistance in series with the tank input, the RF current's tube path is as follows:
Construction: Mount the nine pin tube socket on the general purpose board by 1/2" spacers at one end of the board. Keep all lead lengths as short as possible to avoid losses and parasitic. All resistors should be 1/2W unless stated on the schematic. The tuning capacitor on the tank circuit is air variable type.
Vacuum tubes were the first practical signal-amplifying device. They dominated electronics for over 50 years. Most sophisticated analog circuits and even computer circuits were first implemented with tubes. When transistors became available, it was relatively easy for vacuum tube engineers to redesign the old circuits using transistors.
few tubes and batteries. After much reading and thought and finally a lot of testing, we chose the popular Twinplex circuit, using the 1G6G double triode tube. In our final receiver we made just a few changes; we added a 20 μμf bandspread condenser, connected in parallel with the main tuning condenser; we used commercial 4 -prong short -wave and broadcast coils instead of home-made coils ...
The circuit is flexible enough that almost any part can be substituted and the transmitter will still work. Most of the parts are junk-bin items, although the main transformer is something you ...
Voltage gain is often used in high-impedance circuits such as pentode vacuum tubes and is also sometimes convenient in solid-state circuits. Its improper usage often creates errors in radio circuit design because many calculations, for correct answers, require power ratios rather than voltage ratios.
The manuals in this archive are available to all who enjoy working on and restoring old tube type amateur radio equipment and short wave receivers. Bill Beech, NJ7P -- Tube Data Searchable Database
Shortwave Receiver HOTDXS WORKBENCH - The KC5LDO Shortwave Receiver -
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. Over a decade of homebrew tube radios, and much excellent material on regens. Building Notes for Tube Type Regenerative Radios by Dave…
The 1S5 tube used in our receiver has a directly heated cathode. Directly heated cathodes are still familiar circuit elements in ham radio designs, even in 2022. A prime example is the popular grounded-grid power amplifier using vacuum tubes such as the 811. The filament is usually powered through a bifilar wound choke.
I have built many regenerative vacuum tube shortwave receivers, now I wanted to attempt to build a simple shortwave transmitter.
8 Watt Tube QRP AM Shortwave Transmitter Are you interested in this 8 Watt tube AM shortwave transmitter? If you ever wondered how those tube AM shortwave transmitters from the early 1960's worked, then why not build it yourself? Most would tell you that hand-assembling a tube AM shortwave transmitter offers a much richer experience than simply operating it. And when you're finished, you'll ...
It's been many years since Tandy corporation has put out th one tube radio kit. The voltages required were different although. 1.5 V for A battery and 22.5 for B battery.
Web Links Bill Beech, NJ7P has a tube database on his web site. Comprehensive Transmitting Tube Data 1988 Handbook Base Diagrams and Data Ian White, GM3SEK, sells kits for tube control and protection. They are of particular interest to hams building tetrode amplifiers, which have more complicated biasing circuits than grounded grid triodes.
A copy from an old italian magazine of amatorial electronics, proposing an add-on for tube receivers. The add-on was a simple one-tube short-wave transmitter leveraging the same power supply already available in the receiver. This circuit fascinated me when I was just a teenager. Click on the pic for enlarging. I was quite a nerd when I was a ...
1942 One Tube "Beginner's Special" Receiver Seventy-five years ago this month, the July 1942 issue of Popular Mechanics carried the plans for this simple 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.
Today's project is a 1930's style single valve CW transmitter. Demo QSO with Tim, G4ARI.
Homebrew RF Circuit Design Ideas "There is no such thing as a new idea. It is impossible. We simply take a lot of old ideas and put them into a sort of mental ...
Below is the schematic diagram of the transmitter. The antenna coil was salvaged from the oscillator circuit in a typical old radio with a 455kHz I.F. frequency. The coil generally has two windings; one with a larger DC resistance than the other and is indicated as the larger winding in the schematic.
What I really needed was a single tube that could generate 20 watts or so comfortably with a 475 VDC plate supply. Another rummage in my stash of tubes and out popped a 6146 in good condition. Looking up the references in the RCA Transmitting Tube Manual gave values for screen and grid resistors and other important parameters.
1967 One Tube CW Transmitter Fifty years ago, the March 1967 issue of Electronics Illustrated carried the plans for this simple 40 meter CW transmitter. The set ran directly off AC power, with a transformer supplying 120 volts B+, rectified through two silicon diodes, as well as 6 volts for the filament of the single 6AQ5A tube.
An article by Frank J. Collins entitled "Regenerating Audion Circuits for Wireless Receiving" includes the circuit diagram shown above. If the circuit looks familiar, it's because it's the same circuit, with minor variations, used in most of the one tube radios shown on this site.
This project involves the construction of a one-tube ham radio QRP (low power) transmitter for the 80 meter or 40 meter band. There are two versions shown, a basic CW transmitter and a CW transmitter with full break-in (QSK) capability.
The circuit is based on a design by EN Bradley for a pocket one-valve receiver, which used a 3A5 (DCC90) valve. Since this set is intended for young persons, I didn't want to have any high voltages, such as one normally associates with valve equipment.
The circuit is not particularly unique and is eerily similar to several one-tube designs from the 50s and 60s such as Ameco's famous AC-1. Most however, don't use a tube as ideal as the 5763. The 7-pin miniature tube is not only a good RF oscillator but its physical size would provide me the matching Neophyte appearance I was looking for.
In summary, e xperiments can be done with this circuit in order to always try to improve performance. Various contacts have been carried out regularly with this transceiver.
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One helpful note: when discussing circuits (or in general schematic representations) it is a good idea to have reference designators (e.g. R1, C4, etc) This utilizes a dual triode vacuum tube (two triodes in a single 'bottle')
1935 One Tube 5 Meter Transceiver Stanley Johnson, W9LBV, of Grand Island, Nebraska, is shown here in the December 1935 issue of Popular Science operating his $3 five meter transceiver. The set contains a single tube, a type 76 triode.
A simple one tube receiving circuit is a regenerative. The issue is from receiving to transmitting the plate current and operating curve of the tube is substantially different.
We had a very nice QSO, and it turned out that Bill was using a homebrew, one-tube transmitter using a 6A6 tube. I Googled "6A6 transmitter" and found a site that described the circuit. Unfortunately, that site is now offline, but I just Googled again and found this item on the QRZ.Com forum.
The cathode output shown in one of the RV12 P2000 circuits, should affect the oscillation frequency less, but it may still affect it's amplitude. But your carefully chosen 10pF output coupling cap into a two segment 2k load should also make your frequency very stable.
The Improved 1-Tube AM Transmitter Original Prototype Current Design My original One-Tube Transmitter was built using a 6M11 tube which I just happened to have on hand. Although it works very well as is, I decided that the design could be improved and simplified, by using a tube having characteristics specifically suited for the various functions. The first change was to eliminate the separate ...
Date 1 - 20 of 36 Can anyone recommend a vacuum tube CW transmitter project ?
The result is a very simple circuit consisting of only one tube and a handful of components that produce amazing results. Add a couple of stages of audio amplification and you have a radio design that provides hours of fun and listening pleasure! Circuit Description The basic circuit consists of a dual triode 12AU7.
Amateur radio is the only hobby that offers its licensed operators the chance to legally design, build, and operate high power radio transceivers connected to unlimited antenna arrays for the purpo…
The document describes two circuits for an antique radio receiver. Circuit 1 uses a 1U4 or 1T4 vacuum tube powered by 1.5V and includes an antenna, headphones, variable capacitor C1, fixed capacitor C2, and inductors L1, L2, L3. Circuit 2 is similar but uses different values for L1, L2 and removes L3. Both circuits can be powered by two 9V batteries in series and include inputs for an antenna ...
References AA8V/W8EXI 6CL6 One-tube transmitter Pi-tank calculator by Owen Duffy Initial load line of valve RF amplifier calculator by Owen Duffy The 6CL6, 807 and 807W datasheets. Care and Feeding of Power Grid Tubes (Eimac/CPI): an excellent resource for the valve engineer or experimenter. G3PPR on the 807.
For many radio amateurs from the 01930s until the early 01970s, the single-tube crystal-oscillator transmitter was the bare-minimum means of getting on the air. Figure 1 shows the schematic diagram of a well-known example of this transmitter type: the Ameco AC-1, now highly valued as a nostalgic buildable and/or collectible even by hams who didn't use one as beginners.
The path for that "pull" is from cathode to anode, the grids just control the instantaneous resistance of that path. You can read more about how a tube (or transistor) drives a tank circuit on this page. Because of the tube acting like a variable resistance in series with the tank input, the RF current's tube path is as follows:
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. However after constructing it, I was less than impressed. While it "received" stations, the sensitivity was poor, the aerial loading caused dropouts or changes in oscillation level, and of course the stereo/SCA subcarrier beat problem was ...
"The Muntz" (1 tube) An AM transmitter using only one tube? Yes, and a very commonly available one at that. This circuit is a bare-bones transmitter that, with a 10-foot (3 meter) run of wire as an antenna, will readily transmit an AM signal to nearby radios. What's more, it doubles as an accurate and convenient 1 MHz marker generator for aligning shortwave radios!
Finally, shown here on the continuation page is the "Oscillodyne," a super-regenerative circuit. In addition to all of these one-tube sets, the issue also contains some two-tube receivers, as well as a few one-tube phono oscillators. This entry was posted in Radio history on December 1, 2017. ← 1942 Coffee Rationing 1917 Stewart ...
WERS 1 Tube Transceiver by RCAProduction » Feb Mon 24, 2020 4:54 am I recently came across an article in QST of October 1944, which provides a schematic and building details for a 1 tube transceiver.
Revision 4.0 is being distributed for a donation to the SVdP charity. If you receive a copy from another source and find it of value, please consider sending a donation of $20 or more to:
Created Date 4/20/2000 7:20:08 PM
One problem that I see with a one tube CW transceiver that no one else has mentioned is that you can't transmit and receive on the same frequency. In order to receive CW with a regenerative receiver, it has to be tuned slightly off the incoming frequency to produce an audible beat note.
If your goal is single supply operation, then the tubes with the higher filament voltage at 3V, 5V or 6.3V have an advantage over those that run at 1.5V. One thing to consider in the selection of a common triode/tetrode/pentode for reverse triode operation is the magnitude of the grid current in forward bias.
Even-harmonics are cancelled, and the tube interelectrode capacitances are in series. Total inter-electrode capacitance is then equal to 1/2 of those of a single tube and 1/4 those of a pair of tubes in parallel, thereby minimizing drift from this source. Also, the primary emitted wave-form generally has much lower harmonic content.
A number of simple one and two tube low power AM transmitter circuits have been proposed in recent years for use at home to transmit music for playing on our antique radios. A recent one is Joe Sousa's suppressor modulated 6AS6 transmitter. The quality of the transmitted signal, of these recent designs, is markedly better than the old phono-oscillator and pentagrid convertor designs. However ...
Regenerative receivers come in all kinds of types, circuits, shapes, colours, just about any variety you can think of, tube and solid state. Most of the above description might apply directly to a regen using FETs. I think a time has come to have, perhaps, a similar organisation to the crystal set society, only for regens. Hmmm, think about that.
To make a tube set up powerful oscillations then, it is only necessary that an oscillation circuit shall be provided.
A little higher math seems to indicate that combining these two circuits into a transceiver would require five tubes, but that's not how hams like [Helge] roll.
Even though this CW (continuous wave, for sending Morse code) transmitter circuit was published in 1955 in Popular Electronics magazine, it is still legal for today's Amateur radio operator. Portions of the 40-meter and 80-meter bands are still reserved exclusively for CW operation. As of 2021, the 40-meter band (7.025-7.125 MHz) and the 80-meter band (3.525-3.600 MHz) are both reserved for CW ...
My very first Homemade transceiver was a tube TRX 3 bands and it was 44 years ago when i was a Scout which introduce me to Amateur Radio . Now it is time to build a new one 6 bands also. (80,40,30,20,17 and 20m) For the TX i will use the 12V6GT which is a beam powered tetrode. Above 20m it is wotking but the power is decreasing significantly.
Three Tube Superheterodyne Receiver Part 1 A couple of years ago, I acquired a collection of vintage 1930's era vacuum tubes which were designed to be operated from a battery supply. Some had 1.4 volt filaments and some had 2.0 volt filaments. The 1.4 volt tubes were designed for operation from carbon zinc dry cells, while the 2.0 volt tubes were designed for operation on lead acid cells or ...
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