I built my first re gen radio in the 1970s using a 1T4 tube with D cell for filament and 3 9V battery for B+. them 90V hard to get now. use 10 9V batteries. used a loop stick coil for MW had a tune able slug so went into 160Meter ham band. and a little into long wave. with a 365pf cap. someone else in my school built a re gen radio for 27Mhz all transistor in 1980. CB was common then. surprised how well it worked.
Thanks for the video.I'm about to embark on a recreation of the one tube regen Radio used by U.S. POWs in the Cabanatuan prison camp during WWII. it was built into a drinking canteen and when not in use was hung in it's canvas carrier right in front of the japanese guards!I'm slowly getting all the period items together, and me and my young son will start putting this together. my goal is to use all 1940s parts.73'Jim KB1PFL
I have in my grubby little fist, Template #12, of The Science Electronics, Inc. multiple circuit kit sold as a learning aid for budding electronic afficionados. It is a schematic of a Regenerative Grid-Leak (Pentode) reciever. My dad gave me the 12-circuit kit back in the 50's. The #12 template used a 1T4 tube. The paper template was laid over a 10" x 11" pegboard and one would place the components (each had its own plastic base with appropriate verical pins to make the connections with different lengths of jumper wires) on the template through the appropriate holes to make up the circuit du jour. Much fun; and I remember being crouched up in my home's attic just under the roof pulling in signals from all over the world with a long-wire antenna strung through the roof vent. This Christmas, my daughter gave me a beginner's kit by Elenco to potentialy show my grandson, but it's poorly executed and a few of the circuits, as designed, don't work. It uses pictures to show how to mount the parts..which snap together. Someone needs to bring back the Science Electronics kit! I ''ve got a hankerin' to build this kit from scratch, now! DE KA7MWQ,
A metal front panel would eliminate the hand capacitance effect and you would have no need for the pill bottle. Otherwise, you have a nice project that is very well made. I built my first regin in the mid '50s and was hooked for life! 73 -- de Mick, WB4LSS
Mick Bradford Thanks Mick for the kind words and the comment. I agree; I thought about a metal panel but I just wanted to build a very basic design. I hope that your comment will help someone else, someone who is thinking about building a set of their own. It's definitely a worthwhile learning project. Nobody seems to build projects anymore. Oh well, the world's changing. Thanks and 73, John KU4JZ
Hello. Nice project ! I tried making one using a loop antenna and a 6J1P russian tube with about 30 V of plate current and it had poor results, with the regeneration potentiometer not making much difference from one end to another. Do you have any advice ? You said that you don't want it to oscillate in the broadcast band. Why is that ? This sounds counterintuitive. Also, how can I choose the tube so that it doesn't work with huge voltages ? Ideally, I would stick with the 6J1P since I have a lot of them and I don't have much use for them.
Hi... It looks like a project built by an experienced experimenter. Very impressive. Is the Wikipedia circuit, the Armstrong one and I take it that the two diodes in the valve (tube) are just ignored? The original role for that tube is in a superhet...IF detector diode, AGC diode and triode audio amp. Thanks for dragging out my memories of the early days (for me).(Fifties!) when I used an acorn valve (tube) type 954. Still get the valve but not the holders. Yours worked so well that I might just have a go at it, for fun even with all the fancy stuff on my shelf! TNX es 73 de G3NBY
***** Thanks G3NBY, it was a fun project. Reminded me of some of my childhood projects, I was fascinated with circuits and AM radio. Yes, the Armstrong tube just amplifies. I just followed the schematic and it worked....pretty well. A metal front would have helped, but I wanted to make it simple. Thanks for watching es 73 my friend. John KU4JZ
Survivalist2008 Thanks John. The problem is finding some plug in coil formers. Very rare these days...Maybe yours isn't plug in but just one fixed coil? 73 de G3NBY
Of someone ever makes this info a kit,I think a lot of people would want one,as long as it has good step by step instrucktions.
I built my first re gen radio in the 1970s using a 1T4 tube with D cell for filament and 3 9V battery for B+. them 90V hard to get now. use 10 9V batteries. used a loop stick coil for MW had a tune able slug so went into 160Meter ham band. and a little into long wave. with a 365pf cap. someone else in my school built a re gen radio for 27Mhz all transistor in 1980. CB was common then. surprised how well it worked.
Thanks for the video.I'm about to embark on a recreation of the one tube regen Radio used by U.S. POWs in the Cabanatuan prison camp during WWII. it was built into a drinking canteen and when not in use was hung in it's canvas carrier right in front of the japanese guards!I'm slowly getting all the period items together, and me and my young son will start putting this together. my goal is to use all 1940s parts.73'Jim KB1PFL
I have in my grubby little fist, Template #12, of The Science Electronics, Inc. multiple circuit kit sold as a learning aid for budding electronic afficionados. It is a schematic of a Regenerative Grid-Leak (Pentode) reciever. My dad gave me the 12-circuit kit back in the 50's. The #12 template used a 1T4 tube. The paper template was laid over a 10" x 11" pegboard and one would place the components (each had its own plastic base with appropriate verical pins to make the connections with different lengths of jumper wires) on the template through the appropriate holes to make up the circuit du jour. Much fun; and I remember being crouched up in my home's attic just under the roof pulling in signals from all over the world with a long-wire antenna strung through the roof vent. This Christmas, my daughter gave me a beginner's kit by Elenco to potentialy show my grandson, but it's poorly executed and a few of the circuits, as designed, don't work. It uses pictures to show how to mount the parts..which snap together. Someone needs to bring back the Science Electronics kit! I ''ve got a hankerin' to build this kit from scratch, now!
DE KA7MWQ,
A metal front panel would eliminate the hand capacitance effect and you would have no need for the pill bottle. Otherwise, you have a nice project that is very well made. I built my first regin in the mid '50s and was hooked for life!
73 -- de Mick, WB4LSS
Mick Bradford Thanks Mick for the kind words and the comment. I agree; I thought about a metal panel but I just wanted to build a very basic design. I hope that your comment will help someone else, someone who is thinking about building a set of their own. It's definitely a worthwhile learning project. Nobody seems to build projects anymore. Oh well, the world's changing. Thanks and 73,
John KU4JZ
Great little receiver. I love rengens and built a few. Keeps kids amused for ages.
It was fun. Thanks es 73, John
Thanks for watching! Please Like, Comment, Subscribe.
Merci pour cette vidéo ! Très beau récepteur au fonctionnement parfait ! congratulations !
Hi John.
Great video. Very informative on your radio.
Carl
Thanks Carl, it was a fun project. Take care.
Hello. Nice project ! I tried making one using a loop antenna and a 6J1P russian tube with about 30 V of plate current and it had poor results, with the regeneration potentiometer not making much difference from one end to another. Do you have any advice ? You said that you don't want it to oscillate in the broadcast band. Why is that ? This sounds counterintuitive. Also, how can I choose the tube so that it doesn't work with huge voltages ? Ideally, I would stick with the 6J1P since I have a lot of them and I don't have much use for them.
Hi... It looks like a project built by an experienced experimenter. Very impressive.
Is the Wikipedia circuit, the Armstrong one and I take it that the two diodes in the valve (tube) are just ignored?
The original role for that tube is in a superhet...IF detector diode, AGC diode and triode audio amp.
Thanks for dragging out my memories of the early days (for me).(Fifties!) when I used an acorn valve (tube) type 954. Still get the valve but not the holders.
Yours worked so well that I might just have a go at it, for fun even with all the fancy stuff on my shelf!
TNX es 73 de G3NBY
***** Thanks G3NBY, it was a fun project. Reminded me of some of my childhood projects, I was fascinated with circuits and AM radio. Yes, the Armstrong tube just amplifies. I just followed the schematic and it worked....pretty well. A metal front would have helped, but I wanted to make it simple. Thanks for watching es 73 my friend. John KU4JZ
Survivalist2008 Thanks John.
The problem is finding some plug in coil formers. Very rare these days...Maybe yours isn't plug in but just one fixed coil?
73 de G3NBY
These were blank surplus bakelite forms. I experimented on the number of turns. Worked out pretty well.
Thanks Pedro!
+Pedro Henrique Silva de Deus
Hi Pedro.. Just found your advice. Been in Dry-Dock for heart repairs!!!
Thanks for the tip..I'll try them. M.O.L.
I have a schematic for a 1 tube 6BF6 tuber