This is an authentic early 30's Regenerative Receiver that is designed for Portable Ham Radio Operation on Batteries. Let's try to figure it out and operate it.
Пікірлер: 49
@CARL5575118 ай бұрын
Someone took their time making that receiver, I'm sure they were proud of it when they made it!
@MIKROWAVE18 ай бұрын
I would love to see this show up in a picture. I will have to dismantle it. Hopefully something scratched inside?
@W1RMD8 ай бұрын
You have some of the most unique videos on KZbin! Thanks for sharing this with us.
@MIKROWAVE18 ай бұрын
Glad you enjoy them! And thanks for being a subscriber.
@JCWise-sf9ww8 ай бұрын
It will be nice to hear this home made radio play.
@MIKROWAVE18 ай бұрын
First it has to be dismantled - carefully...
@Swamp-Fox8 ай бұрын
Very interesting receiver!
@MIKROWAVE18 ай бұрын
Can't wait to dig in.
@markmelchiori5118 ай бұрын
Mike! I'm really glad you decided to do a video on this diamond in the rough. Very interesting...like a large percentage of your video topics! I wonder if the original maker/owner was a...DX hound. (sorry) Many thanks!
@MIKROWAVE18 ай бұрын
We shall see soon.
@markmelchiori5118 ай бұрын
Fabulous!@@MIKROWAVE1
@frankartieta48878 ай бұрын
I wonder if there might some advantages in some of these older forgotten circuits. Maybe not but still I do not think a anything beats a real working example. I have a huge respect for the radiomen of the era.
@erichkeyes55788 ай бұрын
I like old radio restore by the way the Franklin Oscillator lives! 2 build so far.
@MIKROWAVE18 ай бұрын
Wow that is great. Nice to see some folks playing with a "new" circuit - that really is not new...
@ingussilins63308 ай бұрын
Regen receiver is a freqency depended negative resistance converter. Negative resistance in antenna make "black hole" for radio waves. ( very sensitive reception ). Antenna transmitts negative resistance to enviroment thinks ( house walls, tree's ground... ) and "attract radiowaves".
@MIKROWAVE18 ай бұрын
Wow like a WAVE MAGNET!
@ultrasoundguy18 ай бұрын
Ah, a cliff hanger. Very appropriate for something from the 30s, much like the serials back then. Will Captain Mike regenerate the regen? Or will those old capacitors blow higher than Vesuvius? Tune in next week to find out!
@MIKROWAVE18 ай бұрын
Soon. Soon.
@ultrasoundguy18 ай бұрын
@@MIKROWAVE1 No rush, as the tension mounts, so will the ultimate enjoyment. 😅
@johnwest79938 ай бұрын
It's always a good sign when the getter flash is still all shiny. If that's the case, then helium ingress would be my only concern about the vacuum.
@MIKROWAVE18 ай бұрын
The sad vacuum tube hides its pain with a white film.
@migsvensurfing63108 ай бұрын
Nice handbuild receiver. I look forward to see it working. Thank you for the interresting video.
@MIKROWAVE18 ай бұрын
Its going to be tough to check initially. It will have to come apart, I fear.
@KennethScharf8 ай бұрын
Actually the type 30 was made i 3 formats. The very first version may have been the tubular "T" envelope, most dry battery tubes (such as the 199) were first made in the form. Then they switched to the "S" or spherical / globula type you showed, and finally to the "ST" bulb. In the '50's, they even switched back to the "T" or "GT" format again! The original "Twin Plex" circuit was from the 1930's. It was actually the same circuit as the dual type 30, but it used a twin triode type 19. I built one of these.
@MIKROWAVE18 ай бұрын
Wow very early battery tubes. Not having a cathode to heat has battery benefits including less heating current and instant on.
@DAVIDGREGORYKERR8 ай бұрын
The Vacuum tubes made to operate of 12V Heater supply and a B+ of 12V might also work well,you know the ones made in 1957 for use in Car Radios when the transistors of the day were not ready for prime time so should work of 4xPJ996 batteries.
@MIKROWAVE18 ай бұрын
Of course battery tubes are more efficient than space charge tubes because the space charge tubes require a very hot cathode. 120 mW compared to 1.8 Watts per tube.
@utubejeffo8 ай бұрын
How in the world did the maker of this little gem get his big fat ham radio hands in that itty bitty box? Can the sides come off or something?? How did he solder anything with one of those irons big as a popsickle in there??? Love it. Make it work! 73 K4UIE
@mikekokomomike8 ай бұрын
He hired a Japanese guy to build it.
@michaelyancey30218 ай бұрын
Could be one of the side walls also comes off for some access. Otherwise, it's like building a ship in a bottle.
@Steve-GM0HUU8 ай бұрын
Maybe just had little hands 😂.
@michaelyancey30218 ай бұрын
😆
@MIKROWAVE18 ай бұрын
Pray for me - it will have to come apart.
@ronalddaub97408 ай бұрын
Bfo man that's the coolest
@user-bo8eq7ki5w8 ай бұрын
Treasure. Littl *old HAM* resiver 😊. 73.
@MIKROWAVE18 ай бұрын
Next it must be carefully taken apart for inspection.
@DAVIDGREGORYKERR2 ай бұрын
What about replicating that radio using that flat vacuum tube with the 1.5V heater and A B+ of 45V might be a bit microphonic but that cannot be helped and don't generate much heat but it makes me wonder how the manufacturer uses them in in their pedals
@MIKROWAVE12 ай бұрын
Have you considered open air triodes - no vacuum?
@thomasvandevelde8157Ай бұрын
The Jones 1936 Radio Handbook has a RFC-decoupled Headset and B+ line. I'll get you the page-number if you"re interested;
@MIKROWAVE1Ай бұрын
The technique does block RF so it adds to the decoupling possibly improving the RF bypassing (throttle capacitor) thus possibly helping stabilize the feedback.
@tennesseetrawlerman22286 ай бұрын
In this schematic at 10.23 I do not understand the filament voltage on the second (output) tube ! It seems to have no voltage to light the filament. Your schematic later on does, but this looks like an original photo??? There is 45 volts across the filament to plate, but no apparent source of filament voltage?
@MIKROWAVE16 ай бұрын
Likely just an oversight.
@alainmichaud89928 ай бұрын
Hopefully he will have an interview with Britney....
@SergiuCosminViorel8 ай бұрын
Britney, the guy? Or another gender?
@MIKROWAVE18 ай бұрын
Any Brittany would help the channel.
@alainmichaud89928 ай бұрын
@@MIKROWAVE1 You are doing a real good job. It looks like it is a lot of work to produce one of those every week! Is there someone helping you with editing etc.?
@MIKROWAVE18 ай бұрын
Nope but it is getting crazy at this point. And my editing is not great.