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.

Morgan's was the first electronics book that I remember picking up!

This book needs to be reprinted.... Those were the good days

@magoolew5131

2 жыл бұрын

I'd buy one for sure. The original books are selling for around up to $135 on eBay.

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.

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

2 жыл бұрын

Regens are magic boxes!

@joewoodchuck3824

2 жыл бұрын

@@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.

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.

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.

Really gotta love that B+ running from ear-to-ear! Great idea with the clip-boards Mike!

@MIKROWAVE1

3 жыл бұрын

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. :)

Oh, forgot: Excellent Video!! :)

I used to have that book. Excellent

Subscribed recently. My apologies; I thought I subbed a long time ago. Always good stuff.

I have that book , I was just looking at that project.

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.

Wow, I have not seen that book in years

@stationvictormike3415

5 жыл бұрын

I used to have both books back in 78-87

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.

@MIKROWAVE1

5 жыл бұрын

Yup they are R2's which are military WW1 I think.

@brucegordon7248

5 жыл бұрын

@@MIKROWAVE1 Sounds right to me.

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.

Mr. Morgan's books were responsible for creating the interest that led to a 46 year career as an electrical engineer.

@MIKROWAVE1

2 жыл бұрын

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.

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.

@zachreyhelmberger894

3 жыл бұрын

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! kzread.info/dash/bejne/f2mV2tOzcpCyibQ.html

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.

Could I modify the circuit to work with an 1T4 tube? I have a couple of those.

What about using the Raytheon Wire-Ended low voltage vacuum tubes makes for a very safe to use radio.

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.

Why can't someone make that into a kit ,I would but that in a min.,it very cool and well done

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.

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.

@MauriatOttolink

8 жыл бұрын

+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.

If those coils are 4-pin, where did you get the socket? Can't seem to find one.

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.

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.

What ?? one end of the headphone is connected to B+ ?

what is the coil and wire ?

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).

@MIKROWAVE1

7 ай бұрын

There are a lot of folks who are sick to build this receiver all around the world.

Can you use like a 1R5, 1U4, 1U5, or a 3V4...any of these tubes work???

@MIKROWAVE1

6 жыл бұрын

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.

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

3 жыл бұрын

Keep watching - Part 2

@chadcastagana9181

3 жыл бұрын

@@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 - - - ?

Great video, I was wondering where you were going to get the B+ with no ac power.. Really like the solution... 73s Rich KG5IF

@MIKROWAVE1

2 жыл бұрын

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.

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

@magoolew5131

2 жыл бұрын

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.

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

OMG nice build, so selective for a simple design nice

Hi Mike, What guage wire did you use to wire the receiver?

@MIKROWAVE1

3 жыл бұрын

I used #22 on one and #20 on another.

On internet i found 6j1 tube fm radio is it really fm radio ? Can u help me to understand?

@MIKROWAVE1

3 жыл бұрын

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.

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

@MIKROWAVE1

2 жыл бұрын

Usually the tension on the pinch wheel. First take it apart and clean it! Good Luck.

@MauriatOttolink

2 жыл бұрын

@@MIKROWAVE1 Man thanks...73 de G3NBY.

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...

Could this circuit be built with a JFET or BJT ?

@MIKROWAVE1

5 жыл бұрын

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.

@edwardneuman6061

5 жыл бұрын

@@MIKROWAVE1 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.

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…

Здравствуйте. А разрешите ссылку на книгу? Или название и автора?

@MIKROWAVE1

2 жыл бұрын

kupdf.net/download/1954-boyx27s-first-book-of-radio-amp-electronics-morgan_5ca82462e2b6f58758f68f6a_pdf

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

the coil has the problem.

Use a vari cap for regen control its far superior

@JohnSmith-eo5sp

5 жыл бұрын

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

Limpia el potenciometro!

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

@UpcomingJedi

5 жыл бұрын

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?

73 yu 1 qg

When I rebuild an old tube radio, the first thing I do is REMOVE this 'black beauties' !!