Howdy, just passing through and thought I'd ask for a little help. I have an old SC sau-22 mono p.a. amplifier (20 watts) which I've used from time to time. Great little amp, but lately it's losing power output. I get some volume, but not like I used to. It looks like a mid-50's model, with a 12ax7 pre-gain stage, one 7687, two el84's, and one 5y3gt for output. Not a very high power amp, but one that I like for the sound quality. I'd like to put a little life back into it and use it again. I know it could be something as simple as new tubes, which would probably be a good place to start, but if it's something more serious than that, I'd like to have some schematics to reference. Anyone know where I might be able to find them for this model. Any help would be appreciated. Feel free to email me with other questions or info. Thanks to all.
Huck
<*))))><

Hi Huck

Your Stromberg-Carlson SAU-22 is in Sam's Photofact #1334. You may be able to get this information from your local library or can call Sam's at 800-428-7267.

Norm

: Howdy, just passing through and thought I'd ask for a little help. I have an old SC sau-22 mono p.a. amplifier (20 watts) which I've used from time to time. Great little amp, but lately it's losing power output. I get some volume, but not like I used to. It looks like a mid-50's model, with a 12ax7 pre-gain stage, one 7687, two el84's, and one 5y3gt for output. Not a very high power amp, but one that I like for the sound quality. I'd like to put a little life back into it and use it again. I know it could be something as simple as new tubes, which would probably be a good place to start, but if it's something more serious than that, I'd like to have some schematics to reference. Anyone know where I might be able to find them for this model. Any help would be appreciated. Feel free to email me with other questions or info. Thanks to all.
: Huck
: <*))))><

: Hi Huck

: Your Stromberg-Carlson SAU-22 is in Sam's Photofact #1334. You may be able to get this information from your local library or can call Sam's at 800-428-7267.

: Norm

:
: : Howdy, just passing through and thought I'd ask for a little help. I have an old SC sau-22 mono p.a. amplifier (20 watts) which I've used from time to time. Great little amp, but lately it's losing power output. I get some volume, but not like I used to. It looks like a mid-50's model, with a 12ax7 pre-gain stage, one 7687, two el84's, and one 5y3gt for output. Not a very high power amp, but one that I like for the sound quality. I'd like to put a little life back into it and use it again. I know it could be something as simple as new tubes, which would probably be a good place to start, but if it's something more serious than that, I'd like to have some schematics to reference. Anyone know where I might be able to find them for this model. Any help would be appreciated. Feel free to email me with other questions or info. Thanks to all.
: : Huck
: : <*))))><
My vote would be for leaky coupling capacitors. That amplifier will date into the early fifties, back when men were men, and amplifiers were good. I will soon be refurbishing an S-C amplifier from the same era; a AU-36. This is a 50 watt unit that should also sound great. All caps WILL be replaced.