What are the tubes on this? I heard you say 50EH5, some kind of preamp (not EL 84), but what about rectifier?  Solid state? 35Z4?

In your schematic it looks like 375 v less the drop through the 4k7 res and the 100k plate res.  Figure your 12AT7 current draw from the data sheet and you can calculate the voltage at the plate.

 Roly:  How do you feel about Q201 emitter having .82 volts?  If that is true and if emitter resistor is small (I can't read schematic but in super Beatle it's only 100 ohms). Isn't that more current through Q201 than we would expect?  Shouldn't it only be a mA or so?

Re transistor types the OP probably won't have any more info available than "TO 98 with yellow and green paint dot", "TO 39 with heat sink".  RG Keens geofex site has info on likely transistors used.  I want to say 2N2925 for the small signal one.  You could probably get any reasonable small signal device to work if you mind the pinout (change pin order to fit board by careful bending).  I will look at home and see what I have in the Berkeley.  It is similar and I had to replace some transistors in it, including reverb driver.

I have a Berkeley and a pathfinder, and one that that often happens when you touch anything in them is that wires break.  Since you replaced caps, double check you aren't missing a ground wire connection somewhere.  Also, even though you don't have a layout can you measure E B C voltages for each device ? Reverb recovery  is likely to have a heat sink.  Other reverb transistors will be nearby on the board, also you can look near the reverb lines in and out to identify which devices are related to reverb.

What a week for Argentina.  First the pope, now the second most famous man in Argentina is thinking about sending amps to the US!  Exciting times.

This looks very similar to my RG80/100ES.  To the poster that questioned the "double-pot" I think that is the push-pull switch for the diode-clipping on the treble switch?  Mine has that feature.  When I got it it had some issues.  It still has some hum, but I think that is a "feature" too, to some extent.

Oh TRF.  The cub scouts and I put together some ZN414/MK484 TRF receivers a couple of years ago.  Yer basic cub scout radio.  We etched small circuit boards using enamel paint as the resist and just painted simple pads for dead bug style circuit.  Fun stuff.

I love it!  Especially the "insulation is for whussies" approach to wiring.  What is it?  Regenerative receiver?

ZLY PIES:

Bardzo dobrze!  Do tej pory nie znalem polskiego slowa "head"!  Ha ha.  Przepraszam za brak polskich liter, jestem Amerikaninem.

Good job on the amps and the web site!

Very informative post, JM.  I have always wanted a mini-moog.  Now I will pay more attention to component codes if I get one.

Just for the record for future people searching for randall, mouser carries the jones connectors and sockets too...

http://www.mouser.com/Search/Refine.aspx?Keyword=jones+connector

My favorite amp amp is 1983 Randall RG80/112SC - btw.

Very nice!

P.S. I see you and I share the same aesthetic when it comes to faceplate design. 

I ended up getting a Mod 8FB series. It fit the original bolt holes, but the box is a little larger and it hit the circuit board, so I had to move it slightly and drill new 1/8" holes.  Not a big deal and it works fine.

nebraska player:  Footnote #5 at the bottom of the schematic has instructions for measuring AC voltages.  You need 1khz signal, 8ohm load, various settings...otherwise the readings aren't going to match TP.  you can probably fix this too with out worrying about the AC.  If you have no verb at all I would start looking if U4 and U5 have necessary voltages.  I'm guessing you re-soldered those guys too?