100S with reverb - where to repair?

[Jack Woodward]

100S with reverb.  All the schematics and info found so far show this amp withOUT a built-in reverb.  What gives?  Was this a "special" of some sort?  I want to get it repaired to be in tip-top shape.  It's pretty fragile right now, or so it seems.  Blows fuses sometimes, "motorboats" sometimes.  HELP!!

[Ryan Phelps]

Jack;
This website has the schematic you need. Go to the home page and scroll down to Schematics. Click on it and scroll down to "100S".
If your amp is blowing fuses and motorboating, try replacing the can filter cap. Old filter caps cause most motorboating and if your amp has the original cap then it's time to replace it!
These caps are available from Antique Electronic Supply in Tempe AZ ( www.tubes andmore.com). Get the 4 section, 40-20-20-20uf, 525 volt cap (the 40-40-20-20uf cap will work fine too). They cost about $32. While you are in there, replace the two 50uf, 75 volt caps in the negative bias supply. If you don't know how to install, take it to your amp tech. Filter caps contain LETHAL voltages so don't mess with it if you are not trained.

Good Luck!
Ryan