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Silvertone Organ Amp schematic

Posted: 28 Jul 2007, 20:21
by RLBJR65
I was going to make a guitar amp out of this but the PT is bad :( Funny it worked okay when I got it a month or so ago, but smoked when I pluged it in the other day to check voltages. Oh well... bought it cheap at a yard sale and the organ is air operated so it still works.

Here is the schematic https://img524.imageshack.us/my.php?ima ... amprd5.gif

The unmarked pot (tone control?) was mounted on the back, I lost the sticker but it was labled something like adjust for Hall / Room size.
Inductors have no markings that I can see.
Volume pot was on the foot pedal.
On the input It had what looked kind of like old telephone speaker/mics that were mounted under the air chamber.

Point to point confuses me but I think I got it right. If anyone sees anything wrong that I should look at again please let me know.

Anyone have the transformer specs?

BTW here are a couple of pics I just found. http://akroncanton.craigslist.org/msg/381946616.html
DAMN I drove right through Akron YESTERDAY! It's not worth driving back 2 1/2 hours for.

Richard

Posted: 15 Aug 2007, 09:25
by CS Jones
Richard, hi. A few things.

So this schem is yours? You drew it out? (if so, kudos to you for the time spent. It's a lot of work and we often make mistakes. That's just part of learning).

You're looking for a new Power Transformer? The OT is ok?

You saw and smelled the original PT smoke?

Did you plug your fiddle in and play through it before it blew?

Posted: 17 Aug 2007, 02:51
by RLBJR65
Thanks CS

It worked when I first got it, never plugged a guitar into it though.

Unfortunately I saw, heard and smelled the PT sizzle.

I'll probably end up just scavenging the AT and sockets for another project.