SC 50 PA+ schematic help!

[nitrobuddha]

So, I have one in the shop with a nasty hum and I need a schematic for it. I found one on a pay site, but it looked kinda sketchy and I didn't feel safe using my paypal on it. Does anyone have a copy they could spare? It would really help and I would be eternally grateful.

[Pleb]

Hi there, i just joined the Forum a minute ago. I have a few Sound City schematics at home, I'll have a look through them, I'm in the local Library at the moment cos I can't get on the net at home.

[nitrobuddha]

Thanks! I really appreciate the help.

[gimmemandrax]

hi did you have any luck finding 50 pa+ schematics.i've been looking for them ,especialy for mark4.i'd realy appreciate any help,and if i find any i will let you know.

[1953Vintage]

Does the PA 50+ have solid-state (transistorized) channel preamps?
Also, does it have reverb?
I'm not that familiar with the PA models.

The best I can do is point you to a PA 50 R schematic I just posted on the Sound City Site's "Amp Schematics" page. Use the link below. (I went ahead and bought a copy from MusicParts.com.)

[gimmemandrax]

Hi thanks for your reply.There are 3 pa50+ models.The reverb model which i think, s a mark 4 R ,has solid state preamps.The straight Mark3 and mark 4 have valve preamps.They do seam to be very hard to get a hold of.I'm modifying a mark 4 and it's only the second project i've done since getting interested in diy amp modding.I've stripped out the controls and first three preamp wiring,but there's another ecc83 before the P.I. and i'm not quite sure how to deal with it.Its got a power amp in and a master volume connected to it.I'll manage to work it out if i can't find a schematic,or i can ask for help from the guy who usually services my amps.But a schematic or some advice would help a lot.Once again thanks for your reply and any help is very much appreciated.

[1953Vintage]

But a schematic or some advice would help a lot.

I'm not clear from your reply if you checked this or not, but again, look at the PA 50 R schematic I posted at the Sound City Site. When you get to the site's Amp Schematics page, look under "Miscellaneous Schematics." It's for the later DMI model.

I hope this helps!

[gimmemandrax]

hi,thanks i have checked it out.