02-11-2017, 12:19 AM
I would not rush into replacing parts unnecessarily.
The caps are most likely already ceramic, or Mylar film as they began to be used around 1960 or so. Some of the existing caps are better quality than what you can buy today. I have a Fisher 400 running on all its original parts without any problems at all.
Download the service manual and check the parts list first. If they are listed as ceramic or Mylar I would definitely leave them alone. The nice thing about your receiver is that it is most likely completely original and untouched.
One thing I would definitely check and possibly replace is the selenium bias rectifier. If you lose negative bias on the output tubes they will cook and put excessive load on the power supply.
You can find the manual here: http://www.vintageshifi.com/repertoire-pdf/Fisher.php
The caps are most likely already ceramic, or Mylar film as they began to be used around 1960 or so. Some of the existing caps are better quality than what you can buy today. I have a Fisher 400 running on all its original parts without any problems at all.
Download the service manual and check the parts list first. If they are listed as ceramic or Mylar I would definitely leave them alone. The nice thing about your receiver is that it is most likely completely original and untouched.
One thing I would definitely check and possibly replace is the selenium bias rectifier. If you lose negative bias on the output tubes they will cook and put excessive load on the power supply.
You can find the manual here: http://www.vintageshifi.com/repertoire-pdf/Fisher.php
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