Anyone know where I can get a photofact for a Silvertone organ amp chassis number 157.47101 or 157.47210?
I pulled one out of a no-model cheapie reed organ. I got the whole shebang for $35, which included a nice 8" oxford 8HB. All the tubes ( silvertone branded) test new. Lineup is 5Y3, 6v6GT, 12ax7a, and 12DW7 (vibrato channel). Very nice sized output iron, and the power transformer is nice and small (perfect match for the size of the amp, not undersized or oversized.Runs cool @ 357vdc.)
Its going to make a nice cheap champ clone. Vibro champ anyone?
Anyways, I can't get the vibrato to work, I'm wondering if the caps in the oscilator section might be dried up?Theres an old dubiler cap and some "astron corp" paper caps in it. The rest are ceramic.
I can post a pic of the chassis if it helps, I can't really dig up much information on the net about any silvertone organs, let alone the amps. Of cource I could just gut it and build a champ circuit around it, but I want to try getting the vibrato working first. I have tried to schem it out but I'm finding some weird circuitry which I don't understand. The pre and post are typical gain stages, but the one in the middle that mixes the vibrato section is WEIRD. It almost reminds me of the entire vibrato section of a vibrochamp, and the oscilator section of a deluxe reverb. I'll take some pics and do a scan of my hand drawn schematic if it will help.
I pulled one out of a no-model cheapie reed organ. I got the whole shebang for $35, which included a nice 8" oxford 8HB. All the tubes ( silvertone branded) test new. Lineup is 5Y3, 6v6GT, 12ax7a, and 12DW7 (vibrato channel). Very nice sized output iron, and the power transformer is nice and small (perfect match for the size of the amp, not undersized or oversized.Runs cool @ 357vdc.)
Its going to make a nice cheap champ clone. Vibro champ anyone?
Anyways, I can't get the vibrato to work, I'm wondering if the caps in the oscilator section might be dried up?Theres an old dubiler cap and some "astron corp" paper caps in it. The rest are ceramic.
I can post a pic of the chassis if it helps, I can't really dig up much information on the net about any silvertone organs, let alone the amps. Of cource I could just gut it and build a champ circuit around it, but I want to try getting the vibrato working first. I have tried to schem it out but I'm finding some weird circuitry which I don't understand. The pre and post are typical gain stages, but the one in the middle that mixes the vibrato section is WEIRD. It almost reminds me of the entire vibrato section of a vibrochamp, and the oscilator section of a deluxe reverb. I'll take some pics and do a scan of my hand drawn schematic if it will help.