Hey John,
I had an original PV10 and worked on it extensively. There are a handful (maybe like 4) electrolytic caps which should be replaced, but that’s all I can think of as getting old. Everything else was film. There was also an undersized (compared to the 12) heater cap as I recall.
The PV 12 was the same preamp, with a 3 stage voltage regulator. This made it more reliable as well as better channel separation.
The sound however was in large part due to the output caps which were high quality film, but probably not teflon. :) As I recall they were around 4uF. An alternative to teflon you should consider, if they fit, is copper foil.
I had an original PV10 and worked on it extensively. There are a handful (maybe like 4) electrolytic caps which should be replaced, but that’s all I can think of as getting old. Everything else was film. There was also an undersized (compared to the 12) heater cap as I recall.
The PV 12 was the same preamp, with a 3 stage voltage regulator. This made it more reliable as well as better channel separation.
The sound however was in large part due to the output caps which were high quality film, but probably not teflon. :) As I recall they were around 4uF. An alternative to teflon you should consider, if they fit, is copper foil.