Sunn SX4150

[Axtman]

I guy gave me an old solid state Sunn SX4150 to repair. Well it does not make a sound because the output transistors are missing! Does anyone have any information on these amps? I downloaded (for $20) the schematic from MusicParts.com and there is no information on the transistors.

Thanks!

[Enzo]

$20? Wow, I wish you had come here first. Fender would have sent it to you for free most likely, and we could have posted it.

Does your schematic look like this?
http://bmamps.com/Schematics/Sunn/Su...Schematics.pdf

The outputs are listed as TIP102 and TIP107 on this drawing.

[Axtman]

Live and learn I guess. Thanks. Next time I check in with the forum!

[J M Fahey]

Funny they used 6 x TO220 devices instead of usual 2 or 4 x TO218 (TO3P) .
They also used (unneeded) driver transistors (TIP10* are darlingtons).
Maybe they got a special deal on them, cents on the dollar, not much used anywhere else (if at all).

But hey, each one uses what he pleases