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The Fisher Pre Amp on X-101-C base
 
 

  I do not like building preamps for the fact that the jacks and the input selection always carry along a lot of boring work. So I prefer using existing units or bases from integrated amps.

  The Fisher integrated amps are real classics. When I started with tube gear in the mid 80s I really loved them and optically my favourite unit always was the X-101-C (technically I prefer the early X-100 with EL84s and tube rectifier).

  I got this X-101-C without output transformer, so it was an easy decision to convert it to a preamp. I carried out the following changes:

- tube rectification with 6AU4 (on the original 7591 sockets) = rectifier tubes with 6.3V heaters

- Tape Head input is now a Moving Coil cartridge input (very nice as the MM input still works)

- Siemens T-41 input transformers for MC

- Siemens choke (from 6SELA amp) and more filter caps (some had to fill some original holes...)

- cathode follower output stage (original phase splitter tubes) as in McIntosh C-20 or C-22

- treble / bass control bypass possible

 

  Avery Fisher already used a lot of German parts in his amps (as ERO caps, Telefunken tubes and German resistors), so I only added original 1960s Siemens parts.

 
 

 

 

 

 
     
 
     
 
     
 
 

 

 
 

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