A follow on project from the highly successful crystal set night. This masters thesis starts with an outline and overview of the important design parameters of the superregenerative receiver srr architecture in chapter 2. About high performance regenerative receiver the resource is currently listed in in a single category. One example is the schmitt trigger which is also known as a regenerative comparator, but the most common use of the term is in rf. Posted in classic hacks, radio hacks tagged antique radio, regenerative receiver, tube radio, vintage radio books you should read. Drm i do like that the schematic you posted includes a stage of audio preamplification before the lm386.
The regenerative receiver, regen radio was a popular form of radio receiver in the 1920s and 1930s. Building a doerle two tube shortwave receiver radio boat. A regenerative radio receiver is unsurpassed in comparable simplicity, weak signal reception, inherent noiselimiting and agc action and, freedom from overloading and spurious responses. I through is a simple receiver that should be easy for most anyone to build, regardless of his experience. The basic paradigm of this design is to break up the traditional oscillating detector into a separated regenerative amplifier and detector circuit. Radio and electronics apparatus 106 7 crystal detectors 118 8 simple, practical radio receivers and how to build them 126 9 how to build a one tube regenerative receiver 160 10 you can build an amplifier 184 11 the antenna and ground for your homemade radio receiver how to solder 204 12 learning to send and receive radio telegraph signals 214. I was inspired by the circuit design of the ten tec regenerative radio kit. Doerles regenerative radio designs were published in many amateur radio magazines in the 1930s.
Tony westbrook recently contacted me about a regenerative receiver kit he has designed and produced in the uk. Like with the better valve designs, feedback is controlled by a variable capacitor. Practical wireless april 20 regenerative receiver the. Regenerative receiver the dxzone amateurradio guide. Jan, 2016 a regenerative receiver or autodyne was invented in 1914 by edwin armstrong.
Free shipping on many items browse your favorite brands. The radio is a regenerative receiver using a combination triodepentode tube which is like having two tubes in one, so i guess this is actually a two tube radio. Although i much prefer tubes, this one should satisfy those who may want to build and use a more uptodate. Get the best deals on regenerative radio when you shop the largest online selection at. Dc receiver and one with a manual ity together with a fairly high if can this method. The more i looked at it, the more regenerative receiver regenerative receiver kept popping into my head. For our purposes, the triode vacuum tube will serve as the heart of the regenerative radio receiver. Its advantages are very high sensitivity and selectivity combined with very low cost compared with a superhet or normal t. This book describes in words the simplest regenerative receiver based on a single triode. Practical transistor receivers radio and broadcast history. So this design, getting most gain out of one tube, filled the needs of the growing radio community and immediately thrived. Lange, wiyds vex in this age of crowded hands and sophis ticated communications systems, there is room for the lowly regenerative receiver. 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.
The main advantage of the regenerative radio is that a complete receiver could be implemented with a single vacuum tube using headphones and battery power. From schematics of other regenerative receivers i have recently seen, this same. Although the superheterodyne receiver is the most common receiver in use today, the regenerative radio made the most out of very few parts. A high performance regenerative radio circuit salad. Any radio frequency feedback oscillator topology can be operated as a regenerative receiver if modified to provide a controllable reduction in feedback loop coupling, a method of coupling the loop to an incoming signal source, and a method of coupling audio frequencies out of the loop to a subsequent audio amplification stage or high efficiency headphones. At amateur radio w9brd i routinely use regenerativedetectorbased receivers for twoway morse code communication, and with care given to design and. I wont forget how exciting it was for me to build such a humble radio that so greatly outperformed the crystal receivers that i had been building up to that point. The book told hold to build a two stage regenerative receiver that used only one tube, just the sort of thing i was looking for. Doerle sets were a popular home built regenerative shortwave receiver of the 1930s. But i have a 20 meter regen that is as stable as an 80 or 160 meter regen. The aa8v twinplex regenerative receiver main page and exterior photos. The regen radio was one of the many inventions in radio technology that was made by edwin armstrong. I used some of the same ideas, but changed the design to better match my design criteria.
How to build a crystal or regenerative radio radio boat. Listening very simple to radio amateur with a simple regenerative receiver for 80 meters. As a result this form of radio deserves its place in this summary of the different types of radio available. See more ideas about ham radio, radio design and short waves. When the triode came along, other detectors were invented including a design called a. Whats the best regenerative receiver youve ever built. It uses 3 npn garden type transistors and a lm386 as the audio amplifier. Sep 29, 2019 the video shows the principles of regenerative shortwave radio reception and q multiplying. Ral7 regenerative receiver w solid state ps pu only near denver, co.
The video shows the principles of regenerative shortwave radio reception and q multiplying. Add to this a small book of radio projects compiled from 1940s issues of. Listening to the shortwave broadcast stations during many hours was nice. The regeneration setting on the krc2 is unaffected by the receiver tuning or the antenna coupling.
This book built the reader up through a series of steps to a fullyfunctional 3transistor medium wave am radio with a small loudspeaker. Some of the output of the amplifying device is applied back to its input so as to add to the input signal, increasing the amplification. The regenerative radio receiver or, even super regenerative radio receiver or, regen if you prefer, are basically oscillating detector receivers. The second part of the book deals with the regenerative receiver as applied to transistors. This link is listed in our web site directory since friday apr 11 2014, and till today high performance regenerative receiver has been followed for a total of 2221 times. This project was designed and built by charles kitchin.
How i built a shortwave armstrong fet regenerative receiver. Make offer vintage crowley model 51 regenerative receiver radio. Armstrongs superregenerative circuit early radio history. Greg lattas electrical engineering and amateur radio pages. Superregenerative receiver srr for short range hf band.
The use of a good earth caused 1485 am to overload the receiver. You have to advance or decrease the regeneration every 75 kc or so. Regenerative radio receiver project gutenberg self. A regenerative receiver for beginners a modern version of the classic re generative receiver is shown in fig 17. I have built countless regenerative radio circuits throughout the years and some have worked well some havent. In this pamphlet, along with the instructions to assemble the kit, are a brief history of the vacuum tube, early radio development and notes on edwin armstrong and his invention of the regenerative radio receiver. This receiver can be regarded as a qrp low power because the regenerative stage uses some microwatts in. With a tube, such as was used in the early days of radio. The simplest is the diode detector mentioned earlier in relation to fleming. This project was my first regenerative radio receiver and one of my favorites as well.
One tube 12v dc shortwave regenerative receiver 12ba6 regen. This receiver can be regarded as a qrp low power because the regenerative stage uses some microwatts in order to work. Radio and electronics apparatus 106 7 crystal detectors 118 8 simple, practical radio receivers and how to build them 126 9 how to build a one tube regenerative receiver 160 10 you can build an amplifier 184 11 the antenna and ground for your homemade radio receiverhow to solder 204 12 learning to send and receive radio telegraph signals 214. It had to be a receiver that easily would fit in a plastic bag to take it everywhere. Making a transistor radio february 3, 2017 by jenny list 30 comments. Regenerative receiver for beginners american radio relay. This receiver uses a 2n4416 jfet orj31, which provides a more sensitive detector than an mpf102. The superregenerative receiver is based upon the regenerative receiver shown in figure 1, while both depend for their operation upon that property of the audionthe threeelement vacuum tubewhich enables it to reproduce very faithfully in greatly amplified form any feeble pulse of electrical energy which is. A three transistor receiver american radio relay league. Regenerative radios and radio kits featuring vintage radio parts. Borden radio armstrong one tube regenerative receiver.
The regenerative radio receiver or, even superregenerative radio receiver or, regen if you prefer, are basically oscillating detector receivers. Fyi, i just found a new catalog from linsays technical books in the mail today. I think this book was discussed on this forum some time ago and it was mentioned that it was out of print at that time. Nov 28, 2017 one tube 12v dc shortwave regenerative receiver. Headphone level only with diode audio limiters for listener safety power supply. Rockey and shown, as one among many, in the lindsay publishing co. As an adult who recently semiretired, it feels as if ive come full circle. Regenerative receiver category is a curation of 24 web resources on, designing superregenerative receivers, small portable regenerative receiver, a 12volt homebrew regen.
Tropicalized version of the famous desert ratt, regenerative receiver for swls, hobbists, listeners and radio hams. Everyone should build at least one regenerative radio receiver. The regenerative detector uses a field effect transistor fet. This simple receiver uses three russian rod pentodes, a marvellous device from the cold war era and in plentiful supply to this day ebay.
Although i much prefer tubes, this one should satisfy those who may want to build and use a more uptodate version. A regenerative receiver or autodyne was invented in 1914 by edwin armstrong. However, he managed to develop a large number of radio circuits utilizing the principle of regenerative amplification or equivalently, positive feedback in amplification circuits. A regenerative circuit is an amplifier circuit that employs positive feedback also known as regeneration or reaction. The main category is regenerative receiver that is about regenerative receiver. Mar 28, 2016 tony westbrook recently contacted me about a regenerative receiver kit he has designed and produced in the uk. Pg1ns ham radio site multiband hf projects receivers. Antenna coupling, types of regenerative detectors, regeneration control methods and output coupling are all discussed. Building a doerle two tube shortwave receiver radio boat anchor.
Vintage crowley model 51 regenerative receiver radio. Key details about the regenerative or regen radio receiver. Please dont forget to bookmark this valuable electronics. This kind of receiver is easy and fun to build and has been used by many generations of hams to learn radio basics. A threetransistor receiver the fet as a regenerative detector by walter f. When a hackaday article proclaims that its subject is a book you should read, you might. 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 audionthe threeelement vacuum tubewhich enables it to reproduce very faithfully in greatly amplified form any feeble pulse of electrical energy which is fed into it. I purchased the book and i highly recommend it and began work on the receiver. The receiver, dubbed the moorabbin, is a two transistor regenerative receiver of conventional design. How to build a crystal or regenerative radio radio boat anchor. This type of set, using thermionic valves, has been a great favourite both for the broadcast and the shortwave bands. Secondary winding 12 and capaci tors c3 and c4 select the received sig nal while tickler winding 1. However these solutions may increase the cost of radio receiver. Using a 20m aerial with a poor earth in the northern suburbs of johannesburg, it was possible to receive metro fm rebroadcast on medium wave, radio pulpit, zimbabwe radio, voice of america, hellenic radio, 1485 am, radio islam and many others after dark.
The book told hold to build a two stage regenerative receiver that used only one tube. Of course, this radio is no collins, and in all actuality, it operates just like a typical regenerative receiver. High performance regenerative receiver resource detail. In spite of the book s front picture, the author mention and discuss, without getting in too much details, radio regenerative circuits based on. The wbr a simple high performance regen receiver for 40m. I also considered building a direct conversion radio, but the fact is, a regenerative receiver can easily be used as a direct conversion detector simply by turning up the regeneration.
It is hoped that we can continue on from the very high level of. The receiver may have been related the ecc 951b commander rx or perhaps ed boomerang rx and possibly designed by. The chance to spend all the time i want building and listening to radios is an absolute gift, and the wbr regenerative receiver aug 2001 qst that ive had the pleasure to use these last few days has brought the magic of radio listening back in a big way. This article covers all aspects of receiver design. It consists of an amplifying vacuum tube with its output connected back to its input through a positive feedback loop thereby amplifying the incoming radio signal by a large factor. In world war ii the regenerative circuit was used in some military equipment. Coupling of the simplest regenerative receiver with an audio amplifier is also described and recommended. So many of these simple designs dont do that, with the result being af output that is marginal for driving a speaker. I have written a short book on regenerative receiver that i have. Most parts are mounted on a printed circuit board that you get to make yourself. Oct 02, 2015 doerle sets were a popular home built regenerative shortwave receiver of the 1930s. They have the book, secrets of homebuilt regenerative receivers by c. One tube 12v dc shortwave regenerative receiver 12ba6.