Pentode Regenerative Receiver







feedback (regeneration) in a tetrode or pentode detector circuit, the incoming signal can be amplified many times, thereby greatly increasing the sensitivity of the detector. Musical Fidelity used 6CW4 nuvistors in their Nu-Vista 300 amplifiers and their Nu-Vista 3D CD players. 8V power supply for ease of use, no nasty high voltages yet. The BG-1's high-C regenerative detector is the result of experiments inspired by the stability of the 40-meter regenerative receiver I published in September 1992 CE QST. A well built regen can give an "all american five" superhet such as an S-38 a "run for its money" My latest regen project is one that uses an HRO drive and dial, with which I plan to use a 6c5 or 6c4 as the "heart" of the detector based upon a circuit from Electric Radio,"The Ultimate Regen". Using it on 2 was a good deal like trying to work 75 meter phone with a 2 tube regenerative receiver: it can be done, but there is little pleasure in it. By the start of WW2, most households had at least one superhet radio, occupying pride of place in the main room of the home. The unusual shapes of the tubes and their low prices were very tempting. Some of the pages are in other languages, particularly German. As most people reading this page, have access to a computer, I decided to use a computer sound card as the A. regen receiver. See the Dynaco Stereo 70 or MK3 schematics (all over the web) for typical implementations using the 7199 tube. title "One-Compactron Receiver - All Bands" and a footnote "Reprinted by permission of Popular Electronics magazine", but with NO citation. 18 results for regenerative radio 1924 tube radio Crosley # 52 Regenerative Receiver w/ 3 tubes (good) C300/201A 2P2 DL92 3S4 NOS 1960s B7G Pentode Valve Tube. This circuit employs a tube with an indirectly heated cathode, typically a medium-mu triode, or a tetrode or pentode with a sharp cut-off control grid. 83 results for vacuum tube radio receiver Save vacuum tube radio receiver to get e-mail alerts and updates on your eBay Feed. This one has the ability to receive both standard AM broadcast band and a part of the shortwave spectrum depending on the position of the band select switch. The regenerative receiver ( patent 1,113,149 ) provided high selectivity with great sensitivity and was the basis for all communication systems for many years to come. 수용율[需用率] (Demand factor)///어느 부하의 최대전력을 취부전력으로 나눈 백분율을 말한다. com: Secrets of Homebuilt Regenerative Receivers (9781559181709) by C F Rockey and a great selection of similar New, Used and Collectible Books available now at great prices. Balanced Modulator The modulator schematic diagram (Fig-ure 3) uses a Motorola MC1496 balanced. The receiver is easy to tune up and does not contain hard- to find parts. Each radio is a one of its kind, according to what practical experience building them shows quite clearly. could, while still sounding pretty good on the air. Late 1950's Gonset Model G-66B Mobile Receiver The picture above shows a Gonset Model G-66B Mobile Receiver I have manufactured by Gonset of Burbank, CA. That is inherent in a simple regenerative receiver circuit. The circuit is based on a design by EN Bradley for a pocket one-valve receiver, which used a 3A5 (DCC90) valve. Crystal Radio Part 2. The use of a socket for plug in coils is not unusual. I've tried to list links where there is (1) a picture, and (2) a schematic. The plans for this little one-tube regenerative receiver appeared in Shortwave Craft magazine 80 years ago this month, May 1936. regenerative VOLUME control to the "tickler coil" to get regenerative feedback. Radio building as a hobby goes back to the earliest days of radio. 3) The "Meissner Midget" receivers. A tuned radio frequency receiver (or TRF receiver) is a type of radio receiver that is composed of one or more tuned radio frequency (RF) amplifier stages followed by a detector (demodulator) circuit to extract the audio signal and usually an audio frequency amplifier. Resistance "Negative" in Oscillodyne In the Oscillodyne circuit, however, the resistance is negative at all times during the "building -up" period, and consequently as long as the circuit can. This was a DX contest challenge that allowed a receiver to use only "1 Active Device", as explained in the rules: "Only one active device is allowed to be counted to get the 1AD bonus points. band is assigned. I have used this receiver with both an outdoor 60 foot long, 12 foot high inverted 'L' long wire antenna as well as a 30" diameter tuned loop antenna. 5 volt octal tubes for cheap and thought I'd try either a 1P5 or a 1N5 as a regenerative detector. BC221 Frequency Meter. gardberg 2,945,092. Image Courtesy: Read More See more. Some of the pages are in other languages, particularly German. Another form of regenerative receiv- er was developed about this time. A low mu tube works best, but medium mu tubes are ok. 1924 The present A. I will post pictures and a better description when I have done so. Hi I’ve “REALLY DUNNIT” this time with this, my latest radio project. The writer had a band-switching converter with a tunable oscillator, but its stability and noise figure left much to be desired. In the mid 1930's RCA produced the Acorn valves consisting of a 954 Sharp cut-off Pentode and 955 and 956 Triodes. In spite of the book's front picture, the author mention and discuss, without getting in too much details, radio regenerative circuits based on pentode and FET (Field Effect Transitors). It didn't work well as a Ham radio receiver although I used it for years on the Medium Wave and 49/41 meter broadcast bands. The first step is very similar to that with which the Q multiplier tuning is determined. I still think that the simple receiver is a very important part of a QRP station. 5volt batteries. This simple regenerative receiver works well using a small wire antenna in length 2… 3 meters. Each radio is a one of its kind, according to what practical experience building them shows quite clearly. PAYMENT IN USA and GERMANY. I will post pictures and a better description when I have done so. tubes regenerative receiver , after searching several radio hobby magazines. I change this directory structure often and your links will not work correctly. To order, please call 800-692-3051. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics. Very rapidly hereafter feedback was applied around the triode amplifier resulting first in regenerative or positive feedback radio frequency amplifiers in 1912 and finally in negative feedback audio amplifiers in 1927. ) is a three-tube set having an R. Bands are changed with help of plug-in coils. Regeneration formed the basis of the regenerative detector receiver and the LC oscillator transmitter. 54mc to 10mc. This 5 tube set was low cost TRF receiver. Regen winding 5 turns; antenna winding two turns. 1923 US President Harding has a radio installed at the White House. Figure 1—Circuit of the hybrid pentode-MOSFET regenerative mixer. The front end is a 6SB7Y pentagrid converter, which is followed by a half-lattice crystal filter made with WWII surplus crystals at about 455 khz. 5 VDC filament at 50 mA and about 2. Advertisers claimed this set to be " the first small radio to carry the Fire Underwriters Approval". Some Regenerative Receivers. David, there might be an RF amp in his test receiver in the video, can't say for sure but I suspect there is, it's the regen detector that interests me, I think what the bloke is trying to do is design a regen detector where by the point of oscillation is kept constant across the band, so far as I can make out he's trying to do that by two seperate means, first by a hybrid feedback loop using. Schematic of a regen receiver using one triode. The oscillator uses a 6AU6 pentode voltage amplifier and a 6CL6 triode-connected cathode follower. DIY Two tube Regenerative Receiver REGEN SHORTWAVE RECEIVER RECEPTOR REGENERATIVO 12ax7 6bq5. A tuned radio frequency receiver (or TRF receiver) is a type of radio receiver that is composed of one or more tuned radio frequency (RF) amplifier stages followed by a detector (demodulator) circuit to extract the audio signal and usually an audio frequency amplifier. Plug-in coils are used, for […]. It is possible to spot your frequency on another receiver by tuning the detector to oscillation (advancing the feedback into oscillation) and finding your signal on the other receiver. After digging through various TV tubes and pulling up datasheets, I found a 33GY7 that contains a diode and pentode, which could be used as the rectifier and audio output respectively and the 12AT7 for the regen and preamplifier. Home; web; books; video; audio; software; images; Toggle navigation. The Regenerodyne featured in the above videos was the primary receiver used at my station for NRR. 5 volt octal tubes for cheap and thought I'd try either a 1P5 or a 1N5 as a regenerative detector. This is a compact, battery operated antenna amplifier designed for AM and SW radios. This was a DX contest challenge that allowed a receiver to use only "1 Active Device", as explained in the rules: "Only one active device is allowed to be counted to get the 1AD bonus points. 8V power supply for ease of use, no nasty high voltages yet. You also get sample circuits and photos from the 1934 Shortwave Manual and very early QST magazines. However, its performance is similar or better than usual regenerative receiver. I would appreciate it very much if you would print the dia- gram showing the proper connec- tions and the values of all parts re-. at category am radio circuit : RF CircuitsCircuits and Schematics at Next. A 1T4 power demand is minimal, 1. 4 volt pentode (DAF91) of the type which became readily available chiefly for use in portable radios. Conversion from a Junk AA5 Receiver to a Cool AM Transmitter - with plans and schematics. the ingenious circuits of Sir Douglas Hall as published in The Radio Constructor. One Tube Regenerative Radio. When it comes to making an FM receiver it's always thought to be a complex design, however the one transistor simple FM receiver circuit explained here simply shows that it isn't the case after all. [183 mW total supply drain] That's fairly "starved" considering the. A well built regen can give an "all american five" superhet such as an S-38 a "run for its money" My latest regen project is one that uses an HRO drive and dial, with which I plan to use a 6c5 or 6c4 as the "heart" of the detector based upon a circuit from Electric Radio,"The Ultimate Regen". It can be simple but to get decent performance the regen becomes as big a project as a simple heterodyne. In the pictures, you can see the tickler coil nestled underneath the Compactron. Here is a one tube regenerative (regen) shortwave radio. This circuit, known as the auper-re- generative, had special means of pre- venting oscillation, the set could. Description: This receiver uses the triode portion of a 6AN8 tube as an RF amplifier and the pentode portion as a regenerative detector. The triode may be used as frame blocking oscillator. Mike Tuggle - This year's 1AD set is a Bazian Reflex circuit, modified for RF regeneration. a pentode front end we can for the most part ignore the screen supply resistance. The receiver has two r. The pentode demands an impedance in its plate circuit, because of the high internal plate resistance. In electronics, the superheterodyne receiver (also known as the supersonic heterodyne receiver, or by the abbreviated form superhet) is a receiver which uses the principle of frequency mixing or heterodyning to convert the received signal to a lower (sometimes higher) "intermediate" frequency, which can be more conveniently processed than the original carrier frequency. which has a grounded-grid triode RF preamp and a pentode regenerative detector, there are three controls, the preselector (antenna tuning), the detector tuning (frequency) and the regen control. Magazines sprang up left and right in attempt to fill this new radio hobby need. The present invention relates to a quenching oscillator for super-regenerative receivers and has for its primary object to provide means for quenching the radio frequency oscillations of a super-regenerative receiver at a very rapid rate without losing receiver sensitivity. Shop our wide selection of regenerative radio now! Shop Regenerative Radio on sale from eBay. Dönerkebab. A feature of the receiver is the "single dial control," with R. Some of the pages are in other languages, particularly German. Read honest and unbiased product reviews from our users. Eventually more than three million. For tubes, I picked a 1D7G pentagrid converter, a 1D5GP pentode, and a 1H4 triode. never seen it used in any regenerative receiver until, as a teenager in the late 1940s, I obtained a broadcast-band kit radio called the Electrokit No. Radio Havana Cuba Dxers Unlimited weekend edition for Sunday 10 June 2018 By Arnie Coro radio amateur CO2KK Hola amigos radioaficionados all around the world and orbiting planet Earth aboard the International Space Station where the crew members continue to enjoy sending back to Earth slow scan television signals on the 145. Crosley 50, Type V Radio Lot Antique Vtg Tube Regenerative Receiver. efficiently and economically with the Lafayette HE-35 6 meter transceiver. It uses 4 Russian electronic tubes (6N3P) very similar to ECC81 / ECC85, but with a different pin code. One pentode has a higher power handling capacity than the other. FOR ALL NEW RECEIVERS EVER ABREAST OF THE RADIO TIMts SPE E D has achieved tremendous success with these NEW tubes. The front end is a 6SB7Y pentagrid converter, which is followed by a half-lattice crystal filter made with WWII surplus crystals at about 455 khz. Welcome to the Crystal Set Radio site and the One-Tube Radio resource page. Tubes ordered will be shipped the next business day by USPS Priority Mail or UPS. 6 Valve Regenerative Receiver with Automatic Regeneration Control Background This receiver is a reincarnation of a set I built in 1984, which was actually my first homemade valve radio. The transmitter described in this chapter uses the most ancient vacuum tube technology I. Do you want to remove all your recent searches? All recent searches will be deleted. A 6AF11 dual triode/sharp-cutoff pentode provides a regenerative detector and two stages of audio. If your tube isn't listed then pick one with the same Max Dissipation Rate which is shown to the right in the tube list. the ingenious circuits of Sir Douglas Hall as published in The Radio Constructor. See the links below for an article by him. tubes regenerative receiver , after searching several radio hobby magazines. Either a triode or a pentode tube may be used. I change this directory structure often and your links will not work correctly. This particular schematic shows a 1G6 tube instead of the original #19 or #53 tube. In receivers using the superheterodyne principle, a signal at variable frequency f is converted to a fixed lower frequency, fIF, before detection. The unique simplification of an ordinarily complex subject, the exceptional clarity of illustrations and text, and the plan of presenting one basic concept at a time, without involving complicated mathematics, all combine in making this course a better. By Kees Talen K5BCQ. 4 meter super-regenerative receiver new regenerative receiver the crtr: a ceramic resonator 7mhz regen rx triffid receiver 20m band sdr upconverter kits (kit review) the kanga vfo kit. REGENERATIVE DETECTORS. Triodes are the original detectors. Search this site Morgan One Tube Regenerative Receiver Part 2 TRIODE TUBES, TETRODE TUBES, PENTODE. Almost every year, the Vintage Radio Club of North East Victoria runs a competition called the "Hellier Award". The filter should be installed in its own shielded box. The transmitter described in this chapter uses the most ancient vacuum tube technology I. Low Z input windings for each coil. Regen in a BC221. There are three tuned circuits of which the variable tuning capacitors are ganged. Audio output could be sent to crystal earphones or older high impedance ones but it is suggested that this signal be sent to an audio amplifier. Plug-in coils are used, for […]. Then he built a second one to verify the design, #61. I remember being fascinated by tube radios, though, and wanting to learn about how they work. com > damitr posted: "We now come to Radio Receivers by V. NJ7P SQL Tube Database Query. a AAA AAAs Aachen Aalborg Aalesund aardvark aardvarks aardvark's aardwolf Aargau Aarhus Aaron Aaronic AAU ab abac abaca aback abacterial abactinal abacus abacuses abadan abaddon a. Armstrong developed. The design is based on Radio & Hobbies' "Three Band Two" of May 1957, later reprinted in October 1966. The unusual shapes of the tubes and their low prices were very tempting. 800 frequency with excellent results. Novice Stations of the 1960's - 1975 Part 2. I wonder why he used a 1625 (807) for the tube. For a tube I used a 1N5GT battery pentode with 90V of B+ and using a variable coupling ticker coil. My first SW receiver was the regenerative Knight Span Master. (Heathkit Manual) # Tube Type Function 1 12C8 Pentode Dual-Diode Metal Octal w/grid cap Regenerative Receiver 2 12A6 Beam Power Pentode Metal Octal Audio Output 3 12A6 Pentode (wired as a diode) Metal Octal Half-wave Rectifier Table I: K-1 All-Wave. The major concern is the low input impedance of the detector-amplifier bipolar stage. The receiver, therefore, consists of a triode detector followed by a pentode audio amplifier. 6BA6 Remote-Cutoff Pentode EIA Base & Outline. Brief History of Electronics and Its Development. Hartley Oscillator This oscillator is very similar to the Armstrong oscillator and is commonly used. The triode section is a regenerative detector complete with the normal tuned grid circuit and grid leak Ra, with VC4 acting as the regeneration control. This was a DX contest challenge that allowed a receiver to use only "1 Active Device", as explained in the rules: "Only one active device is allowed to be counted to get the 1AD bonus points. A D cell and five 9V transistor batteries wired in series will work to power this radio. The TDA7000 FM Receiver My attention was first drawn to this IC when Elektor in December 1983 published a project called "Personal FM". "FM-Audio" is a bit "raspy" but considering its only a 1 valve super-regen it does a good job! Super-Regenerative Receiver (Mk 2) A second variation where the LM386 audio-amp module has been replaced by a conventional valve design audio o/p stage, providing far greater audio volume. Conversion from a Junk AA5 Receiver to a Cool AM Transmitter - with plans and schematics. TWO REGEN RECEIVERS by Harry Lythall - SM0VPO. Coupling of the simplest regenerative receiver with an audio amplifier is also described and recommended. The well known series of ex-German receivers use a standard pentode (RV12P2000). New York, Jonh F. ELECTRONIC VACUUM TUBE Electronics in the post Apocalypse. The first step is very similar to that with which the Q multiplier tuning is determined. A Bipolar Regenerative Receiver. Also, the same problems you experience using a single conversion heterodyne at higher frequencies also plague the regenerative receiver. The circuit consist of a standard pentode regen detector/af amplifier with a tapped Tuning or Tank coil plugging in to a standard 7 pin din socket. This particular schematic shows a 1G6 tube instead of the original #19 or #53 tube. Tuned radio frequency receiver explained. If you're using the triode to isolate the antenna from the rest of the rig, I'd use. The picture shows the BC-221 based receiver and a box next to it that says "Frequency Counter Controller". Hands-on Report: I actually built this as a twelve-year-old in 1964, and found it problematic then, though how much of that was my youthful inexperience I don't know. It didn't work well as a Ham radio receiver although I used it for years on the Medium Wave and 49/41 meter broadcast bands. The 1P5 is a remote cutoff pentode and the 1N5 is a sharp cutoff pentode, identical pinouts. Receivers - Homebrew 3-tube Regen Shortwave Receiver - by Floyd Carter. Another tube is twin triode. gardberg 2,945,092. Nevertheless, it can be easily compensated with positive feedback or regeneration. RECEIVERS Three different receivers have been built for powered transmitter. Damit konnten dessen UKW-Störstrahlung reduziert werden. I'm cribbing from the sound circuits of cheap b/w TV receivers from the early 60s, working at a 4. The oscillator uses a 6AU6 pentode voltage amplifier and a 6CL6 triode-connected cathode follower. Some of the pages are in other languages, particularly German. This is a 5-volume set on, as the title implies, basic electronics. A 10 or 15 watt transmitter might require 300-350 volts where as a receiver will often work well using a supply around 200V and a small regenerative receiver driving headphones will require less than 100v. BMI Surplus has a large inventory of used and new surplus Radio Equipment and a wide variety of used Radio Receivers, Antennas, Switches, Transmitters, Inductors. I output to my bench audio amplifier. The Hallicrafters S-36 is a Superheterodyne, Very High Frequency(VHF) receiver that is used for the reception of AM, CW, SSB and FM signals. The introduction of tetrode and pentode valves a little later also meant that fewer valves were needed to make a radio receiver because these new tubes had a lot more amplification than earlier triodes. (1) Tuned radio frequency receivers. A tuned radio frequency receiver (or TRF receiver) is a type of radio receiver that is composed of one or more tuned radio frequency (RF) amplifier stages followed by a detector (demodulator) circuit to extract the audio signal and usually an audio frequency amplifier. I've tried to list links where there is (1) a picture, and (2) a schematic. Several features of autodyne detectors make it extremely useful in various branches of physics and engineering. One major disadvantage to the superheterodyne receiver is the problem of image frequency. Made a VLF receiver with a pentode triode combo tube in 1963. Nevertheless, it can be easily compensated with positive feedback or regeneration. Hands-on Report: I actually built this as a twelve-year-old in 1964, and found it problematic then, though how much of that was my youthful inexperience I don't know. ALL VALVE RECEIVER by Harry Lythall - SM0VPO. You may want to try ( for more audio output to headphones and also quite enough for a loudspeaker ) to use an ECL82 triode-pentode audio amplifier tube, that was very popular among European radio receiver manufacturers of the late fifties and early sixties, before transistors took over the stage. GARC Regenerative radio night. Resistor R1 and capacitor C4 comprise something called a shunt "grid leak," the purpose of which is to accumulate a charge in order to bias the tube for proper operation. Tube regenerative receiver based on original 1930's design, with a modern twist, Varactor tuning and a solid state audio amplifier. The MOSFET's feedback from source to gate is provided via R18 and C33. PCF80 @ The National Valve Museum [Datasheet] The 1954 PCF80 is from the era of VHF Band III television. 1 — A 1000-volt battery is connected between the filament and plate of the vacuum tube shown in Fig. This is done by adding a "tickler" coil in proximity to the main LC tank coil. 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. The number of valves is seldom over 11 in order to keep the number of valves as low as possible, but still perform well. It is very easy to set up and run, uses a 9 volt battery, internal resistance is 8 K so an on/off switch is not needed and a single battery runs for months easily without lasting. Ross, W3FIS. 27 Mb Notes: a very low wave receiver, all band regenerative exciter-amplifier, how to build high voltage condensers, antenna field strength measuring set, improved 5-meter superheterodyne, part II class b audio considerations: RADIO (short wave and experimental) Magazine: 1935 July 94. Scout Regenerative Receiver. Brief History of Electronics and Its Development. The Piglet can receive SSB and CW radio signals in the 40 meter ham band. VACUUM TUBE RECEIVERS AND TRANSMITTERS. I've been threatening to build a rig to test for the ideal screen voltage for whatever pentode I'll be using in a regen. This type of receiver was popular in the 1920s. My general impression of regenerative receivers is that because you don't have many active components, you need to make sure that your passives are top notch or you get shoddy performance. The schematic diagram of the receiver is shown in the figure, a dual-gate MOSFET, Q4 (which is analogous to a pentode vacuum tube), is used as the regenerative amplifier. A crossword puzzle generator that creates valid crossword puzzle configurations from the command line. Most any triode to pentode tube will work in a regenerative receiver. VACUUM TUBE RECEIVERS AND TRANSMITTERS. Almost every year, the Vintage Radio Club of North East Victoria runs a competition called the "Hellier Award". Space-charge regenerative detector in a low-Voltage 2-Valve portable receiver. Tubes ordered will be shipped the next business day by USPS Priority Mail or UPS. Do you want to remove all your recent searches? All recent searches will be deleted. It employed a 1D8GT tube with its triode section serving as a regenerative detector and its pentode section as an audio amplifier. The detector is, of course, of the self-quenching type. 94 Super Regenerative Fm Vacuum Tube Radio Fm Receiver Module Diy Kit 88mhz-108mhz. The receiver, therefore, consists of a triode detector followed by a pentode audio amplifier. This page contain electronic circuits about Electronic AM Band Circuits. Note: Please do not link down into my pages. Since the receiver's tuning capacitor has 3 gangs, I used the spare gang as the loop tuning capacitor. Schematic of a regen receiver using one triode. Here's a view of the receiver's front panel. RF applications with pentodes often. The introduction of tetrode and pentode valves a little later also meant that fewer valves were needed to make a radio receiver because these new tubes had a lot more amplification than earlier triodes. This radio was also the first unit to be encased in a walnut cabinet. Magazines sprang up left and right in attempt to fill this new radio hobby need. Remember that the regen control has to be advanced just to the point where it kicks into oscillation for the set to operate. In the mid 1930's RCA produced the Acorn valves consisting of a 954 Sharp cut-off Pentode and 955 and 956 Triodes. 800 frequency with excellent results. : In middle of the 70s I made. Plug-in coils are used, for […]. 235 New screen grid tube designed to reduce cross modulation and similar distortion. A typi- receiver ig shown in Fig. Damit konnten dessen UKW-Störstrahlung reduziert werden. More Regenerative Receivers. The circuit uses a ECL82 tube, which is a triode and a pentode in one, whereas the triode is used in the first stage and the pentode in the power stage of the amplifier. IF regen), 42 (output pentode) and 80 (rectifier). Post subject: Regenerative receiver from an old RCA signal generator kit. You could use the 12AX7 with one half as a regenerative detector and the other half as an AF amp. The transmitter described in this chapter uses the most ancient vacuum tube technology I. super-regenerative receiver's oscillating detector, which could form a potential hazard to other users of the spectrum both within and outside the limits of the tunable range of the receiver. Homebrew Topics for RF and Audio Projects - Interetsing Discussion Forum. After having monitored, and occasionally participating, in the discussions on the Yahoo Regenerative Receiver Newsgroup, I thought it might be of interest to throw in both some of my experiences, and professional thoughts. 7-MHz IF of the BG-1. Coupling of the simplest regenerative receiver with an audio amplifier is also described and recommended. There are certainly a lot of better choices out there. Figure 1—Circuit of the hybrid pentode-MOSFET regenerative mixer. The challenge is to build an item of equipment, usually a radio receiver, to see who can produce the best result. 18 results for regenerative radio 1924 tube radio Crosley # 52 Regenerative Receiver w/ 3 tubes (good) C300/201A 2P2 DL92 3S4 NOS 1960s B7G Pentode Valve Tube. 57 Sharp-cutoff pentode used in cabinet and mantel radio receivers (except for heater, electronically similar to 6C6 and octal based 6J7, but not to 77) 58 Remote-cutoff pentode (Except for heater, electronically similar to 6D6 and octal based 6U7G, but not to 78) 59 Power pentode, UX7 based. > Zhdanov This book covers all topics related to radio receivers right > from fundamentals to audio, video amplifiers and receivers. On the web there are many examples. This is one of the best space-charge receiver circuits out there: A 12U7 dual triode provides an RF amp followed by a regenerative detector, and a 12AL8 triode-pentode provides two stages of audio amplification into 600 ohm headphones. The regenerative radio was built with a pentode using 27 volts for the plate and screen voltages. The Hallicrafters S-36 is a Superheterodyne, Very High Frequency(VHF) receiver that is used for the reception of AM, CW, SSB and FM signals. I accept payments: PayPal, Moneybookers Shipping Details. 25 A heater and a British 7-pin base VP2 = VP21 = VP215 – Variable-mu Pentode Pentode with a 2 V/180 mA heater and a British 7-pin base. The audio amplifier continues to use a 12A6 power-beam pentode and appears the same. Simple enough, eh? There's just a tuning knob and regneration control. 3) The "Meissner Midget" receivers. The first method involves a receiver with a variable pitch BFO. It didn't work well as a Ham radio receiver although I used it for years on the Medium Wave and 49/41 meter broadcast bands. It is possible to spot your frequency on another receiver by tuning the detector to oscillation (advancing the feedback into oscillation) and finding your signal on the other receiver. It follows the classic one-tube radio design from years ago, but has a modern feature or two. AA00A GLAZING AA00B DECORATIVE AA00C MIRROR GLAZING AA00D SILVERING AA00E AA AA00F A AA00G A SILVERING AA00H B SILVERING AA00J GREENHOUSE AA00K B AA00L C AA00M GROUND. Crystal Radio Part 2. NJ7P SQL Tube Database Query. This circuit is also known as the regenerative receiver Edwin H. driver pentode, and 6146B power beam tetrode final, producing 25 to 30 W PEP. One Tube FM Super Regen Receiver - 12BH7A 12V DC Radio Practical Wireless April 2013 Regenerative radio receiver recepteur-antique-1-lampe radio receiver one triode pentode. ly new multipurpose pentode RV2 P800. A Bipolar Regenerative Receiver. I remain quite excited with this project. Mikrowave1 Channel. In the 6x2 receiver, the local oscillator operates from approximately 5200kHz to 5545kHz. Contribute to emjotde/forcealign development by creating an account on GitHub. The circuit was revised to use a 1. Hands-on Report: I actually built this as a twelve-year-old in 1964, and found it problematic then, though how much of that was my youthful inexperience I don't know. For maximum audio output, the headphones are operated from the pentode section of the compactron, and the phone jack (J4) is arranged to disconnect the speaker when the phones are in use. This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Lindsay's book How to Build Your First Vacuum Tube Regenerative Receiver. I had tested the 6CL6 and 6AU6 tubes. Since there are really two valves in one glass envelope, the set is really a two-valve receiver. Conversion from a Junk AA5 Receiver to a Cool AM Transmitter - with plans and schematics. Regeneration also increases the effective Q of the circuit and thus the selectivity. That is definately a regen receiver, however it is definately a little unusual to see the "tickler" winding in the cathode lead of the tube. It was designed to be a fully, self contained, SW receiver with band switching capabilities by means of plug in coils. tion receiver, with a regenerative detec- tor and basic audio amplifier and with volume controlled by variable aerial coupling. Welcome to the Crystal Set Radio site and the One-Tube Radio resource page. The pentode demands an impedance in its plate circuit, because of the high internal plate resistance. Frequency response may be calculated if the tube is looked at as a class A amplifier tube. 2N2222 Regenerative Receiver The Radio works Great! 1" PVC Pipe 1. After digging through various TV tubes and pulling up datasheets, I found a 33GY7 that contains a diode and pentode, which could be used as the rectifier and audio output respectively and the 12AT7 for the regen and preamplifier. 5ohm regen) 44a963207g01 general electric (cover blank insert for dynamic brake rack assembly) 44a963220g01 general electric (rack) 44a963220g02 general electric (rack 4axis 4slot) 44a963220g03 general electric (power supply) 44a963220g04 general electric (power supply). The autodyne detector, also called regenerative receiver or marginal oscillator, received its name because it is a weakly oscillating receiver of radio waves, and because it produces a beat note when tuned to an unmodulated carrier wave. This is one of the best space-charge receiver circuits out there: A 12U7 dual triode provides an RF amp followed by a regenerative detector, and a 12AL8 triode-pentode provides two stages of audio amplification into 600 ohm headphones. A special version of this receiver has an additional 1. HTM FEB DECJan 5 2009 20102011 37 captures 29 Aug 00 - 5 Dec 10 Close Help F. The major concern is the low input impedance of the detector-amplifier bipolar stage. It can be simple but to get decent performance the regen becomes as big a project as a simple heterodyne. In spite of the book's front picture, the author mention and discuss, without getting in too much details, radio regenerative circuits based on pentode and FET (Field Effect Transitors). I've tried to list links where there is (1) a picture, and (2) a schematic. I've been threatening to build a rig to test for the ideal screen voltage for whatever pentode I'll be using in a regen.