One thing I concluded about pot control of regeneration (which is still my fav way to control reactivity, or feedback, is to make sure you use the highest quality pot possible. I used war surplus Cardwell 20 and 50k pots which were...and still are....silent as the grave. To this day, when I find 'em, I buy 'em. My Regenerodynes use these old birds exclusively.
Goodness. Haven't heard or thought of terms like "grid leak resistor" in years. Thanks for this video. Reminds me of the mail order kit I got in 1955 or so. I built it and it didn't work. I then discovered I should have used rosin core solder. I took it apart and re-built it. Exciting stuff when you're 15 years old.
I was reading and buying similar books, and building these things starting in the late 1950s. I still love the old regens. I was in the last graduating class at tech school in the late 60s to have more tube theory than transistor theory.
@@MIKROWAVE1 I wish I still had the ones I built. What a tragedy they're gone. I was collecting parts for another 9 years ago and all was stolen by a relative.
Nah - a little B+ never hurt anyone as long as you keep it below 60V or so. I used to test cellphones in the lab using a dummy filled with goop for how much it heats your brain. That's safe too. :)
Those headphones you have there, look like the one I recently bought at an antique store. They were made by Western Electric, and made in 1918. You're regen with a clipboard front panel looks great.
I 1st checked that book out from the Phoenix Library in perhaps 1964 as boy of 8. I loved the whole set of three books. I too was inspired by them and my grandfather who was a non-degreed engineer, starting when I was just 5.
Great vid series! I am just getting into tube electronics and this will be a big help. I collect vintage radios but would like to be able to restore the electronics myself. Looking forward to more of your vids.
I actually read this book as a boy! It inspired me to become an Electrical Engineer. Talk about bringing back memories! I read this book in the 1970's as a book from the 1950's. I loved that book! Where did you get the Vernier dial? With the gear reduction mechanism, they are hard to find.
+alexnds1 Scour Ebay..I just bought one...Cheapish. Stateside....not the only one. Might be called National Velvet...MIGHT BE! It's friction slow motion or reduction drive. Has two silly little side windows which appear to do nothing but it works.
You can create the neccesary plate voltage by connecting 9V xsistor batteries in series end on end like a 'W' but - - I have found in my own experience with my one- tube regen that you can greatly increase the range of regeneration by having the tube operate on a much lower than rated plate voltage. My regen's tube uses a directly heated cathode supplied by a 1.5V C cell. The plate voltage is 45V but I found at that potential the regen went into oscillation far too easily with even small amounts of feedback. Two 9V batteries in series gave me very good results with my 1930s 2K-Ohm headphones. So my experiences are very different from yours.
BTW: One 6.3V filament transformer can be used to drive a 12.6 filament transformer running backwards. This gives you an isolated but still dangerous 60VAC (For 120V mains) to feed into a rectifier for plate voltage.
1:00 Why not shunt the feedback control potentiometer across the tickler coil itself? It won't affect the tuning, and won't affect the anode's DC voltage at all
@@MIKROWAVE1 1:00 Maybe the purpose of placing a variable resistance in series with the plate and tickler coil IS to reduce the anode voltage - - in order to prolong the life of what was back then, expensive HT batteries that weren't rechargeable - - - ?
hello, the author of the channel, my name is Alexander, my QTH city is Zaporozhye (Ukraine), I am very sick of the receiver and I found a scan of this book online), A WONDERFUL BOOK!, I will try again).
7:48 I have a set very similar to this one in concept and design. The triode's plate voltage requirement is 45V, and will regenerate well with just 2 X 9V xsistor batteries in series - - allowing for a broad range of regen control.
There is a YT video of a guy running it on just 12V of plate voltage!! And someone commented it even worked all the way down to two volts! ruclips.net/video/M5axqzB-LYQ/видео.html
I think that Stripline inductors are possible and you can listen to signals on the centimeter wave bands, TELEFUNKEN (GMBH) Space Charge Vacuum tubes should work well in this circuit.
Very nice function and appearance. :) I've never had much luck with regens; the simplicity of design and paucity of needed parts has always been overshadowed by getting things to oscillate at the right time, with the right touch, without hand capacitance, on the right frequency spread, with the right ---- well, you've built 'em, you understand. LOL. Except for its nostalgic value I was never a fan of the Boy's Book either. Too many of the circuits didn't work as advertised and quite a few didn't work at all. Still have the book though.
Hello I have a number on regenerative receivers I built. I tried building the one matching your diagram of the up to date one and calculated the winding of the coil I can't get this one to regenerate at all nor do the variable capacitor do anything. Are you sure the pot you used was a 50K ? Thanks.
Has anyone happened to notice the severe, potential safety hazard in this receiver's circuit design? OMG! If a perspiring barefoot child, living in a very warm and humid location such as Los Angeles were to have the receiver well grounded, the moment she (or he) applied the B+ supply to the radio, they could receive a very painful and dangerous shock with current flowing from head to toe. Apparently beside not realizing that girls too can learn to love electronics, Morgan didn't think about electrical safety. Perhaps a 20K resistor from B+ to the plate and the 2.5mH choke tied to the headphones in series with a 10uF DC blocking capacitor.
grt vid.im building a simular regen from homer davidsons book ..radio recievers you can build..i use mor transistors in by builds.so i was wondering how critical it is to the filament weather it gets ac,or dc. in the one im building the tube is a battery type 1s4 tube so i dont need to worry cuz i know i have to use dc.but can some tubes use either .ty.great radio.
I can’t wait to have this level of knowledge and skills, BUT, I’m so worried that, just as soon as I develop these skills, analog, unencrypted terrestrial radio will become extinct…
Hey great. I have the first edition of the book now. Checked it out of the school library as a kid and found it on line many years later. Do you know where I can find the coil forms and sockets. I built a beginners transmitter for a young ham years ago and need a coil form to get it going again. Thanks Dave W4GSM
You could probably make them out of PVC pipe. I've seen that in many radio construction books. I'm not sure if they are still in business, but Antique Radio Supply may still have the original types. I've been out of radio for a while now because I have what is called familial tremors. My hands shake too bad to do any soldering, so I would have to use Fanhstock clips to assemble anything like this now. I tried working on an old computer a couple of days ago and could hardly get the screw back in to remount one of the cards. I'm on meds, but the only somewhat cure for what I have is a neuro stimulator with a wire in my brain.
facebook.com/Mikrowave1 Yes you can make a simple FM superregen with that tube if you have headphones. It is a simple pentode tube receiver that will slope detect FM.
The value of that Regen (Reaction) control's potentiometer maybe dependent on the supply voltage to the tube's plate(Anode). Using a lower B+ battery may extend the range of the pontentiometer control of the feedback
Kennynva yes those battery tubes could all be made to work if you tie the screen grid directly to the plate pin making a pentode into a triode. Try the 3V4 first.
Што-то такое хотел повторить ещё в 16 лет, увидел в учебнике физики переведенный на русский. Но ума и возможности достать прямонакальный триод да желательно ещё и с остальным цоколем...
I no this a old video ,but I hopeing someone makes similar kits ,no everyone has the tools to make these kind of radios ,but a lot of us can assemble a kit,if anyone no where I can find and buy a am tube radio kit with good direction ,please text me
JFET yes but at somewhat lower gain so another stage (audio) might be required to truly be equivalent. Bipolar would require that the main coil be tapped and biasing to be adjusted. Bipolar Regens are notoriously hard to stabilize compared to tubes or JFET types. See my series on early bipolar ham projects.
No, that will have a detuning effect. The pot should be connected across the tickler coil so that the DC voltage on the tube remains constant - - which mean the diagram he should is in error
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Morgan's was the first electronics book that I remember picking up!
One thing I concluded about pot control of regeneration (which is still my fav way to control reactivity, or feedback, is to make sure you use the highest quality pot possible. I used war surplus Cardwell 20 and 50k pots which were...and still are....silent as the grave. To this day, when I find 'em, I buy 'em. My Regenerodynes use these old birds exclusively.
Goodness. Haven't heard or thought of terms like "grid leak resistor" in years. Thanks for this video. Reminds me of the mail order kit I got in 1955 or so. I built it and it didn't work. I then discovered I should have used rosin core solder. I took it apart and re-built it. Exciting stuff when you're 15 years old.
I was reading and buying similar books, and building these things starting in the late 1950s. I still love the old regens. I was in the last graduating class at tech school in the late 60s to have more tube theory than transistor theory.
Regens are magic boxes!
@@MIKROWAVE1 I wish I still had the ones I built. What a tragedy they're gone. I was collecting parts for another 9 years ago and all was stolen by a relative.
This book needs to be reprinted.... Those were the good days
I'd buy one for sure. The original books are selling for around up to $135 on eBay.
Really gotta love that B+ running from ear-to-ear! Great idea with the clip-boards Mike!
Nah - a little B+ never hurt anyone as long as you keep it below 60V or so. I used to test cellphones in the lab using a dummy filled with goop for how much it heats your brain. That's safe too. :)
Those headphones you have there, look like the one I recently bought at an antique store. They were made by Western Electric, and made in 1918. You're regen with a clipboard front panel looks great.
Yup they are R2's which are military WW1 I think.
@@MIKROWAVE1 Sounds right to me.
I 1st checked that book out from the Phoenix Library in perhaps 1964 as boy of 8. I loved the whole set of three books. I too was inspired by them and my grandfather who was a non-degreed engineer, starting when I was just 5.
Great vid series! I am just getting into tube electronics and this will be a big help. I collect vintage radios but would like to be able to restore the electronics myself. Looking forward to more of your vids.
I actually read this book as a boy! It inspired me to become an Electrical Engineer. Talk about bringing back memories! I read this book in the 1970's as a book from the 1950's. I loved that book! Where did you get the Vernier dial? With the gear reduction mechanism, they are hard to find.
+alexnds1
Scour Ebay..I just bought one...Cheapish. Stateside....not the only one.
Might be called National Velvet...MIGHT BE!
It's friction slow motion or reduction drive.
Has two silly little side windows which appear to do nothing but it works.
Hay! Nice Job, I Built The Morgan Regen Receiver Back In 2004,It Works Pretty Good And Noticed The Errors As You Did In The Book. GOD BLESS---KB3VJH.
Mr. Morgan's books were responsible for creating the interest that led to a 46 year career as an electrical engineer.
Amen and Amen.
You can create the neccesary plate voltage by connecting 9V xsistor batteries in series end on end like a 'W' but - - I have found in my own experience with my one- tube regen that you can greatly increase the range of regeneration by having the tube operate on a much lower than rated plate voltage. My regen's tube uses a directly heated cathode supplied by a 1.5V C cell. The plate voltage is 45V but I found at that potential the regen went into oscillation far too easily with even small amounts of feedback. Two 9V batteries in series gave me very good results with my 1930s 2K-Ohm headphones. So my experiences are very different from yours.
BTW:
One 6.3V filament transformer can be used to drive a 12.6 filament transformer running backwards. This gives you an isolated but still dangerous 60VAC (For 120V mains) to feed into a rectifier for plate voltage.
Angela Instruments. 4.99 each and 4 pin plug in coils always show up on Ebay. I see 10 of them with the bid starting at 9 dollars.
I have that book , I was just looking at that project.
1:00 Why not shunt the feedback control potentiometer across the tickler coil itself? It won't affect the tuning, and won't affect the anode's DC voltage at all
Keep watching - Part 2
@@MIKROWAVE1 1:00 Maybe the purpose of placing a variable resistance in series with the plate and tickler coil IS to reduce the anode voltage - - in order to prolong the life of what was back then, expensive HT batteries that weren't rechargeable - - - ?
I used to have that book. Excellent
Why can't someone make that into a kit ,I would but that in a min.,it very cool and well done
hello, the author of the channel, my name is Alexander, my QTH city is Zaporozhye (Ukraine), I am very sick of the receiver and I found a scan of this book online), A WONDERFUL BOOK!, I will try again).
There are a lot of folks who are sick to build this receiver all around the world.
Subscribed recently. My apologies; I thought I subbed a long time ago. Always good stuff.
Oh, forgot: Excellent Video!! :)
7:48 I have a set very similar to this one in concept and design.
The triode's plate voltage requirement is 45V, and will regenerate well with just 2 X 9V xsistor batteries in series - - allowing for a broad range of regen control.
There is a YT video of a guy running it on just 12V of plate voltage!! And someone commented it even worked all the way down to two volts!
ruclips.net/video/M5axqzB-LYQ/видео.html
I think that Stripline inductors are possible and you can listen to signals on the centimeter wave bands, TELEFUNKEN (GMBH) Space Charge Vacuum tubes should work well in this circuit.
Very nice function and appearance. :) I've never had much luck with regens; the simplicity of design and paucity of needed parts has always been overshadowed by getting things to oscillate at the right time, with the right touch, without hand capacitance, on the right frequency spread, with the right ---- well, you've built 'em, you understand. LOL. Except for its nostalgic value I was never a fan of the Boy's Book either. Too many of the circuits didn't work as advertised and quite a few didn't work at all. Still have the book though.
What about using the Raytheon Wire-Ended low voltage vacuum tubes makes for a very safe to use radio.
Great video, I was wondering where you were going to get the B+ with no ac power.. Really like the solution... 73s Rich KG5IF
Nowadays I would still go for 9V batteries in series for 45V to 90V. Current drain is very low. The new rechargeable types could be solar charged.
great stuff. the new days of sdr, i think all this radio art will be lost
You should do a video about your Paraset as well.
Hello I have a number on regenerative receivers I built. I tried building the one matching your diagram of the up to date one and calculated the winding of the coil I can't get this one to regenerate at all nor do the variable capacitor do anything. Are you sure the pot you used was a 50K ? Thanks.
Has anyone happened to notice the severe, potential safety hazard in this receiver's circuit design? OMG! If a perspiring barefoot child, living in a very warm and humid location such as Los Angeles were to have the receiver well grounded, the moment she (or he) applied the B+ supply to the radio, they could receive a very painful and dangerous shock with current flowing from head to toe. Apparently beside not realizing that girls too can learn to love electronics, Morgan didn't think about electrical safety. Perhaps a 20K resistor from B+ to the plate and the 2.5mH choke tied to the headphones in series with a 10uF DC blocking capacitor.
grt vid.im building a simular regen from homer davidsons book ..radio recievers you can build..i use mor transistors in by builds.so i was wondering how critical it is to the filament weather it gets ac,or dc. in the one im building the tube is a battery type 1s4 tube so i dont need to worry cuz i know i have to use dc.but can some tubes use either .ty.great radio.
Of course with more higher voltage batteries comes the price of more resistors... wouldn't want to blow up the valve?
Could I modify the circuit to work with an 1T4 tube? I have a couple of those.
I can’t wait to have this level of knowledge and skills, BUT, I’m so worried that, just as soon as I develop these skills, analog, unencrypted terrestrial radio will become extinct…
What ?? one end of the headphone is connected to B+ ?
If those coils are 4-pin, where did you get the socket? Can't seem to find one.
Hey great. I have the first edition of the book now. Checked it out of the school library as a kid and found it on line many years later.
Do you know where I can find the coil forms and sockets. I built a beginners transmitter for a young ham years ago and need a coil form to get it going again. Thanks Dave W4GSM
You could probably make them out of PVC pipe. I've seen that in many radio construction books. I'm not sure if they are still in business, but Antique Radio Supply may still have the original types. I've been out of radio for a while now because I have what is called familial tremors. My hands shake too bad to do any soldering, so I would have to use Fanhstock clips to assemble anything like this now. I tried working on an old computer a couple of days ago and could hardly get the screw back in to remount one of the cards. I'm on meds, but the only somewhat cure for what I have is a neuro stimulator with a wire in my brain.
On internet i found 6j1 tube fm radio is it really fm radio ? Can u help me to understand?
facebook.com/Mikrowave1 Yes you can make a simple FM superregen with that tube if you have headphones. It is a simple pentode tube receiver that will slope detect FM.
The value of that Regen (Reaction) control's potentiometer maybe dependent on the supply voltage to the tube's plate(Anode). Using a lower B+ battery may extend the range of the pontentiometer control of the feedback
I have a reduction drive of that type but it's not very smooth.
Have you any tips on what may be the culprit?
73 G3NBY
Usually the tension on the pinch wheel. First take it apart and clean it! Good Luck.
@@MIKROWAVE1
Man thanks...73 de G3NBY.
Can you use like a 1R5, 1U4, 1U5, or a 3V4...any of these tubes work???
Kennynva yes those battery tubes could all be made to work if you tie the screen grid directly to the plate pin making a pentode into a triode. Try the 3V4 first.
Што-то такое хотел повторить ещё в 16 лет, увидел в учебнике физики переведенный на русский. Но ума и возможности достать прямонакальный триод да желательно ещё и с остальным цоколем...
Hi Mike, What guage wire did you use to wire the receiver?
I used #22 on one and #20 on another.
what is the coil and wire ?
Здравствуйте. А разрешите ссылку на книгу? Или название и автора?
kupdf.net/download/1954-boyx27s-first-book-of-radio-amp-electronics-morgan_5ca82462e2b6f58758f68f6a_pdf
Wow, I have not seen that book in years
I used to have both books back in 78-87
I no this a old video ,but I hopeing someone makes similar kits ,no everyone has the tools to make these kind of radios ,but a lot of us can assemble a kit,if anyone no where I can find and buy a am tube radio kit with good direction ,please text me
Could this circuit be built with a JFET or BJT ?
JFET yes but at somewhat lower gain so another stage (audio) might be required to truly be equivalent. Bipolar would require that the main coil be tapped and biasing to be adjusted. Bipolar Regens are notoriously hard to stabilize compared to tubes or JFET types. See my series on early bipolar ham projects.
@@MIKROWAVE1 Thanks!
Use a vari cap for regen control its far superior
No, that will have a detuning effect. The pot should be connected across the tickler coil so that the DC voltage on the tube remains constant - - which mean the diagram he should is in error
OMG nice build, so selective for a simple design nice
the coil has the problem.
Hi,, was wondering if you could send me copies of pages for that project to my email.. I'll give U the email if U can do it
Why not just ask that he put a photo of the pages here so that anyone can stop the video, print the screen and continue the video?
Limpia el potenciometro!
73 yu 1 qg
When I rebuild an old tube radio, the first thing I do is REMOVE this 'black beauties' !!