2. amps-preamps
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Conrad Johnson PV-14 background noise

Hi.

I noticed a faint background hum caused by my CJ PV-14 (because there is no noise when I turn on the power amp only), it is not obvious but you can hear it when you get really close to the speakers. I have tried a set of new tubes but the noise did not change. Anybody has experience to share?

Thank you!
jeq
dwr
113 posts
 
The cheater plug just makes a two prong plug out of a three prong plug, you can buy them at a hardware store for under a buck. If you try this and it reduces or eliminates the hum, it could be caused by ground loop.
orpheus10
8,668 posts
 
Have you replaced the electrolytic capacitors. That is the first thing I do after buying older equipment.
orpheus10
8,668 posts
 
My mistake on the PV-14; I was thinking about the PV-12.
jeq OP
17 posts
 
Rrog, it's a very feint hiss.

Orpheus, I have not replaced any of the capacitor. Do you suggest I do so? or it only applicable to PV12, no need for PV14?
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