I have an amp that has been converted to a head. It has a speaker out that is currently
the main output, a tap off of that jack was for the speaker in the combo cabinet which no longer exists. The jack is looking for 8 ohms. This leads me to believe it had an 8 ohm speaker and an 8 ohm extension jack. If i'm running a 2x10 speaker cab it should be 16 ohms??

here are the best photo I'm able to get of the circuit board, without taking all the wiring completely loose. The small transformer which I believe to be the output transformer is numbered as:     606-10-009
                       1A 608-142

I can't find a shred of info anywhere. If I put in the wrong tank it will kill the amp?

I have recently refurbed a Marlboro 132A. It was missing the reverb tank and I can't figure out which one I need to select ( input/output ohms). Can anyone here give me some info?
also it is looking for 8 ohms on the speaker output do I need to rewire my cabinet from 4 ohms back to 8??  thanks