Peavey Question

Justin Griffith · Post by **Justin Griffith** » 23 Nov 2002 7:04 pm

My beloved Session 500 (small cabnet) just developed a very loud hummmmmmmm that gets louder as you increase the reverb. It has always done this a little bit but it has become unbearable. I unpluged the reverb can at the molex connector and it stopped. but if I unplug it at the can it still humms do i just need a new cable for the can or what? Thanks in advance I hate to publicly admit a Peavey problem but Its only over 20 years old

Justin

Ken Fox · Post by **Ken Fox** » 23 Nov 2002 8:01 pm

I had a similar problem with an LTD. Turned out to be the power supply filter caps were going. They must be close in value to keep the ripple the same on the plus and minus supplies, as the ripple is phase cancelled. If one is going, the hum shows up fast in the reverb section!
That is just one of many things that it could be. Also a bad reverb pan or poor connections at the reverb pan or Molex connector (a very likely problem). It could even be a problem with the drive or return circuits in the reverb section of the amps electronics.
[This message was edited by Ken Fox on 23 November 2002 at 08:02 PM.]

Justin Griffith · Post by **Justin Griffith** » 23 Nov 2002 9:32 pm

Ken,
filter caps 2 weeks old so i bet its a can problem but the cable is noisey without the can plugged if i unplug from the chassis (molex) its quiet but if i unplug at the can its still loud???????? thanks Ken for the help I need all I can get

Justin

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Justin Griffith
SD-10 Blanton Quadraverb GT Session 500

Mike Brown · Post by **Mike Brown** » 25 Nov 2002 3:01 pm

Justin, I checked with our technician who works on our steel guitar amp models. From your description of the symptoms, we suggest that you check for a loose ground wire/molex pin in the molex connector that connects the reverb pan to the bottom of the chassis. Let me know if I can assist further.

Mike Brown
Peavey Customer Services

Thanks for the advice, guys.[This message was edited by Mike Brown on 26 November 2002 at 06:05 AM.]

Justin Griffith · Post by **Justin Griffith** » 26 Nov 2002 12:18 pm

Cold solder joint on chassis side. You did it again Mike thanks!

Justin

Mike Brown · Post by **Mike Brown** » 26 Nov 2002 2:31 pm

Thank you for choosing Peavey!