Peavey 5150 Snap,Crackle,and Pop *Help*

[Shimelberger]

Im having problems with my signature 5150 head. When the amp is inflicted with vibrations or for no good reason at all it will buzz and crackle and such. It happens very loudly with no relation to pre or post gain settings. It also happens with the standby switch is off but only after the standby switch had been on and the noises happen at much lower volume.

After I opened the amp up I seem to have narrowed the culprit to large brown capacitor.
(Through the process of taping the board with rubber and listening for a more consistent and sensitive reaction) I could very well be completely wrong but the area that seems the most sensitive is that cluster of capacitors.


After some research I came across this thread: http://www.amptalk.com/message-board...highlight=5150
From another amp tech site from 2 years ago. The problem with that thread is he doesn’t mention what things he re-soldered or anything like that. This is basically all I could find on this problem.

I don’t have very many tools or a lot of money but I need this fixed. (Just like everyone else)
However I do have a small amount of electronic knowledge and can solder well.


If any one can help in any way please do.
Also if you live near the Clearwater, FL area and would be willing to help in person I can trade web design services or I could help your band out with some local connections.


Respect and thanks to all,

Spencer

[tonezoneonline]

Why not join Peaveys bulletin board and ask there.They have some Peavey techs there and it's one of the best boards I've seen supported by the manufacturer.

[Enzo]

It is a very nice board, and one worth the visit if you are into PV gear.

But there is nothing special here. If that guy long ago had cracked solder to a particular cap, nothing says you will have the same solder joint failing on yours.

If you can wiggle things in an area and they respond, take a magnifying glass to the connections there, or just resolder the area. How old are the power tubes in the amp. That is the FIRST thing to mind when pops and cracklers come up.

For that matter, what about wiggling the tubes in their sockets? A loose socket could make such noise.

There is a 400 ohm (390) 10 watt resistor between plates and screen on the power tube board. The wires to the standby switch go from one end of it. Beat that part up and check its solder. And shove on the ribbon cables too. A burning up heater line on one of those could do it.

The thing to do though is to forget it is a 5150 and thing generic crackling amp.