Re: Homebrewing an Electric Gramophone?
Posted: Sat Feb 23, 2019 10:49 pm
There are far more junkers around than will ever be restored.
last year I was clearing some space in the cellar. I junked literally a ton of chassis. I could have easily provided you with all that you needed.
As it stands now, I do have a few power supplies laying about. I can probably come up with tube sockets, the old style. You could easily build up a simple amplifier which looks like this:
The circuit would be very simple, and quite effective. You would need find three audio transformers. Id recommend that you use batteries for the grid bias, for that simplifies the wiring considerably, and the batteries, which in this application provide only voltage (there is virtually no current drawn) will last for their shelf life. A simple, cheap, 1920s balanced armature speaker like the RCA 100A unit would work splendidly:
Do you live in the "Radio Belt"? That is the Midwest, from Minnesota to Wisconsin, Iowa, Illinois, Indiana, Michigan, Ohio, Pennsylvania, New York, New Jersey, Connecticut, Massachusetts. If so, you will have no trouble at all finding what you need once you start looking for it.
last year I was clearing some space in the cellar. I junked literally a ton of chassis. I could have easily provided you with all that you needed.
As it stands now, I do have a few power supplies laying about. I can probably come up with tube sockets, the old style. You could easily build up a simple amplifier which looks like this:
- antique-radio-homebrew-amplifier_1_dd79037770069210df19f9badbe04eb1 (1).jpg (24.69 KiB) Viewed 339 times