Quote from: Enzo on February 19, 2010, 10:38:38 PM
No, the CS800 power transformer is the size of a cantelope. 

Right, the CS800 power transformer is in the bottom half of the assembly. 

QuoteAnd I see the power transformer right there in your photo anyway.

I see that as well, but I am not sure what that transformer is seeing at it's primary.

QuoteIs this the preamp from a MAX?  Or does it say "Max Bass Preamp" on the front panel?  They did sell the preamp as a stand alone too, you know.

It's from a MAX.  It's the early version of the Max Bass Preamp

QuoteThe schematic can be had from PV customer service for the asking.

I sent an email out to them and am waiting with my fingers crossed that they have it.

QuoteI suspect the preamp inot and the preamp section of the Max share the same board. 

I don't understand this part

QuoteYours is dead.  Zero sign of life?  is mains voltage getting to the transformer primary leads?  The red secondary is the high voltage.  I don;t know what it is, but if it makes 100-200vAC or something, I bet it is OK.  And the orange wires are for the +22,-22 rails.

If secondary voltages are present, then are the DC supplies they serve working?   

And so on...

I'll head back and dig deeper.  Thanks for the help, thus far

I have a preamp from an older Peavey Max bass system.  This amp was basically a CS-800 with a bass preamp together in a rack from the factory.
The power amp is dead on this and I would like to be able to use the preamp with a more modern power amp.  The problem I have, is that I do not know what this preamp requires in terms of voltage, etc.

The preamp has been apart from the power amp for sometime.  My plan was to measure what was being fed to the pre amp from the original power supply, but the fault in the power amp was preventing me from being able to power things up to take a measurement. 

Any ideas?