Regen Nuts 

Great Video and Information !!!

Bravo profesore. Svaka čast kad tebe gledam i slušam ne spava mi se.kod nas je sadašnji ponoć. 73 milan i Cooking recepti.

This was a very intresting program to Me. I will see it again for more details. So I still building the low volt regen. I like the last conclusion. Regens are the best receivers in the World. Thanks to share and teach. One more thing. I am LU7AMQ here in argentina. So.... 73'S!

Mike, this regens series you're doing is GREAT !!! As winter sets in here my head is spinning with project ideas. Can't wait for you to delve into that little broadcast beauty behind you !!! AWESOME STUFF 👍

Great video. I keep learning from you. Big thanks.

Incredible sensitivity on that regen. Nice comparison.

Great build. Excellent demonstration plus thoughtful commentary. Very informative. Thank you OM.

I love your videos and have learned a lot from them. Thank you for making them! You mentioned Chappy Happy...I also like his videos and hope he will start making them again.

Ha Ha Weighing in at 85 pounds in the Collins camp the Mighty R390A that can brush off a EMP pulse with ease .And in the Armstrong camp coming in with a lot of ( positive feed back ) the little hot rod the Rejen R29 And in my Estimation ( my thoughts only) its virtually a tie .dont get me wrong I would jump at the chance to own a R390A. But on -cost -Easy build and -size and - performance the R29 ticks all the boxes .A very Fascinateing and Enjoyable video. And have just subscribed.

Think the R-390 was actually classified when it first was released...think the product detector accessory made it a bit better on SSB. Thanks for sharing Mike!

I love your videos Mike and you have inspired me to get back to my teenage hobby of building Heathkits and other things. I have a 1926 era radio like the one on the shelf behind you. Has been sitting on the shelf for years. Never knew if it was worth the effort to try to as you said "power it up". Originally it had a plug in metal horn type speaker but that was lost over the years. Looking forward to following your next video to power that radio up. Mine is a Polle Royal with 5 201A tubes.

Only three hours earlier I was looking at a schematic from 1940 and could not understand what the 100 ohm center tap potentiometer did in a directly heated radio. Thank you very much for all this information.

Hello Mike! Again you've created a great video on regens, a lot of very useful tech information for builders. Great set of schematics. Hey, I know a couple of drawings there! I take of my hat for your work!

"The R390 was designed to be placed on one frequency, and left there forever". Ummmmm. I dunno..I wasn't present at the design of the radio..however I was a morse intercept operator in asia during the sixties, and scan, and roll the dial, and search we did.. eight hour shifts were short duty..12 on 12 off was more the norm, and if you weren't copying a man, you were searching for one.. That old dial was tight, and many suffered from what was known as R390 wrist.. but she was a grand old box.. Oh, by the way, I like regens and other simple radios also..thanks for the video..it's always been a puzzle how a regen can perform as well as it does, given it's simplicity..

I have that coil at 2:31. It was in an old diy radio. I put together my first regen. My frequency range is real short. I will figure it out yet

Many years ago I was such! I built these Regens around amping up the performance of MK484(ZN414 ) Rcvr Crkts produced a couple successful models

Looking forward to hearing the Broadcast Regen behind you Mike. I've just dug a 1920s Regen out of a SK garage. Will be resurrecting shortly.

I am very amazed at the flexibility of the regen vs the R390. Shows there is something to say in the old saying that simpler is better. Not always true, but obviously true in this case. Thank you for sharing this gem! Now then, you built that other regen and never fired it up?!?! That had better be the next video you show us since you let THAT cat out of the bag!

1:12 I burst out laughing! What a great piece of video. You are the best! Now... My week is much better on a Wednesday night. Let me finish the rest of the video. I just aquired this weekend an Air Champ AC-100 almost complete with the shortwave coils. Missing the "telephone" earpiece. A dynamic headset with a 1,000 to 3,000 ohm impedance should work, no? I have a crystal earpiece but it's very faint. I have about 25 feet of antenna wire and a ground on the kitchen faucet. It uses a 3Q4 with a D-cell on the filament and 22.5 volt plate battery. I used 2 then 3 9 volt batteries. Slightly better with 27 volts, but still very faint. I see your video suggesting an inductive plate load. I haven't yet tried that. Many beats so I suspect it's pretty sensitive. I can get it to oscillate. I get about ten stations. It's largely unintelligible though except for 3 or 4 stations. Any ideas? Try another tube? Do you have a good headset to sell me or recommend one? I love the simplicity and..... Integration, synergy? of regen. I have a Vectronics VEC-102 I play with occasionally. It's pretty amazing. One day I'll run a good random and a ground and I'm sure it will really wake up. Thanks and God Bless!

Oh Boy... Do you ever produce some knock out videos! And here's me with a shelf of Icoms and Yaesu stuff. Thank you...

So funny and true!

When I was a kid in the 60's and reading every electronics hobbyist magazine I could get my hands on, regenerative radios seemed to have a bad reputation. At best they were hopelessly obsolete, at worst they were polluters of the RF spectrum. If you had to build one, at least you should put an RF stage before the detector. I never agreed with those who knocked them, and I'm glad to see what a comeback they have made with experimenters. Keep 'em coming!

any suggestions for books which may include the strange use of transistors in clever ways, I agree about mr.chappy... great artistic circuits

wow i thought that was a 30s built regen you used.. very sweet. a power supply video for regens would be cool. maybe a homebrew bench supply variable...

Gotta love that clear musical regen sound!

Sorry, read title as "Reagan nuts"... had to agree. :D

Was using my Regen this evening. 1938 three valves. Compared to my Yaesu 857 it's far clearer / more natural sounding and less noisy.

What about ditching the two high voltage B+ and use two KORG 6P1 Dual Triode flat tubes, B+ can be 48V, Heater can be 2V and give off very little heat, and you might be able to use 3X KORG 6P1 configured as a double balanced mixer like the SO42P but using vacuum tubes as the front end and a TRF as the demodulation stage with an Intermediate Frequency of 455KHZ or if you don't like the flat vacuum tubes then what about the 3X 12AT7 vacuum tubes configured like the internal circuit of a SO42P.

What regen kit would you recommend that is available now that costs less than $70 ??? I am retired and on a fixed income. Thank you !

Mike - just a thought. Could you make a video discussing Regens vs Direct Conversions. I find DC outstanding on CW. A valve DC would be fun.

Hi.

ARC5 owner, please help. KN4ECM