Successful PV7 - home repair
Posted: Fri Oct 20, 2017 7:54 pm
Just thought I would share a small victory. Yesterday while listening to my PV7 the left channel dropped out and the volume and balance pots had no effect. I checked my tubes and examined the board carefully for anything obviously, but saw nothing. And hooked up my back-up preamp and feared the worse.
Today after removing the face plate and bottom cover I was able to take off the rectangular volume pot's cover and check it out. I sprayed the fine metal brush-like contacts with a bit of Deoxit D5, exercised the pot, and sprayed it off w/ compressed air. I only had good access to either the left or right channel of the pot, since there was another pot below the one I could see and was afraid of taking it apart any more. I got lucky, and it's sounding better than ever. Volume and balance work good!
Fingers crossed, my modified Dynaco PAS 3 wasn't cutting it.
Today after removing the face plate and bottom cover I was able to take off the rectangular volume pot's cover and check it out. I sprayed the fine metal brush-like contacts with a bit of Deoxit D5, exercised the pot, and sprayed it off w/ compressed air. I only had good access to either the left or right channel of the pot, since there was another pot below the one I could see and was afraid of taking it apart any more. I got lucky, and it's sounding better than ever. Volume and balance work good!
Fingers crossed, my modified Dynaco PAS 3 wasn't cutting it.