U.S Tube Fisher Purchase?

[Guest Muon N']

Can you give us a pic of the internals, see if anything obviously shot, and see if it's original or not.

[Guest The man who fell to earth]

West German caps.

The good news is nothing's leaking corrosive.

 

 

Edited August 13, 2019 by The man who fell to earth

[Guest The man who fell to earth]

1 hour ago, Muon N' said:

Can you give us a pic of the internals, see if anything obviously shot, and see if it's original or not.

[n0bleINtP]

I personally wouldn't worry too much about the second transformer changing mains AC quality delivered to the Fisher.
Apart from a small derating for 50Hz - sounds like it was built for that?

Also ...
a) many other transformers upstream in the electricity distribution system. nearest one will be on your street?
b) a big Krell power supply I just rebuilt actually had transformers in series: Main: 120+120V - portion of its output to a second 110V transformer. i.e. it had its own step down transformer built in. That second transformer powers the most critical regulated supplies of the small signal / driver sections. 
 

[Guest Muon N']

Apart from electrolytic caps, you need to be careful with some of the old paper n wax and paper n oil caps, as some of these could also deteriorate over time. Then there are carbon composition resistors that absorb moisture over time, and drift in value.