A One valve receiver home made 1920/30's style?
Вставка
- Опубліковано 12 вер 2024
- I like to play with valves and this little project has been fun trying to emulate the 1920's radios of the times. A simple Regenerative feedback or Reaction feedback circuit using a valve to do the hf amplification, detection and audio output to headphones.
Warning this equipment uses high voltages which is dangerous if you do not treat it with respect and care.
Be safe.
I'll never be able to hear Michael Jackson's music without remembering that I've heard his music from a 1920's style regen receiver. You've changed my life !! ;) Brilliant video, construction, thanks for the memory :)
Glad you like it. I will be honest and say I have plans to build yet another radio like this at some point, but in the summer months I tend to do other activities and old valve stuff takes a back seat.
@@ef91valve We are but on the same wavelength, if you excuse the pun. I am organising a new electronics workstation because its the summer, and attending radio rallies on days out because its summer, collecting together bits and bobs for the winter months ahead. You build it and I'll be back for more inspiration and emotional radio therapy just as soon as your ready. See you again.
Reminds me of my youth, late 60s. I was always playing with radios and components and all the other kids were out fishing or playing football. Good old days!.
In the late sixties from around 10 years old I was listening to valved radio/grams, as I had an interest in them all when relatives changed up to the new transistor radios I ended up with the valved gear to play with. Listening to all the interval signals and broadcast would keep me occupied for hours, stations from exotic counties etc. Bit of a far cry now. Now retired I have chance to play again.
@@ef91valve They were good times! So much radio to listen to and I remember the pirate stations, Caroline, radio North Sea and of course the good old Luxembourg 208. 405/625 tvs was the thing for me in the early 70s but gave it all up and got into motorbikes and cars. With all the high tech junk of today, I have renewed my interest in the old era of entertainment at the age of 64.
Great project 👍
Thanks for the comment.
There could well be another version of old receiver soon, I bought more bits!
Another good informative video Adrian, how we have advanced in 100yrs!!
Hi Jim, it amazes me what could be done with what was basically glass and bits tin and wire back in the day. and how one device could do so much. Looking back on it all was the start of electronics as we now know it. Reading about capacitor manufacture using waxed paper and foil etc.
Cheers
Arrright, a magazine project! I love 'em.
Sort of, have some valves and bits, find an article that pushes me in the correct direction, build something, if it works brilliant. Have subscribed to your channel as we seem to share similar ideas.
Excellent results
Thank you, working on the extra valve stage now, not mind boggling but can drive a speaker with a few milli-watts output, very pleased when using junk parts.
Adrian
Hi Adrian,
Certainly works well, most impressed. This caught my eye as I have been researching about grid leak detection as used in the 20's. My grandfather made a single valve set with reaction control, and a variable grid leak. I think 1920's vintage. I am trying to understand the circuit operation, and am intrigued to see in your circuit, the grid leak goes to the positive side of the 2v heater supply. Wouldn't this cause the valve to be hard on?
Keith
Hello Keith, glad you liked it. If it was 2 Volts with respect to the cathode in a normal valve then yes I would expect it to be hard on, but the cathode is the filament and that filament has two volts across it, sticking the grid leak at the positive end does give it a slight amount of positive bias, but we are talking about 1920 valves that did not have massive amounts of current. Some builders did stick another rheostat or variable resistor across the battery and take the grid leak from the wiper, but these would have been around 300 to 400 ohm in value and I did not have one, so without one, the standard place was on the positive side of the filament. The radio would have worked better with 60 to 90 Volts rather than 150 but the little inverter I used would not go below 150 Volts.
Cheers
Adrian