Sunburst79

Hello Gents.

Just thought I would stop by and not that the amp has been quiet and trouble free for over a year now.

I still suspect that the main culprit is all of the spade connectors.

Mine came out of Studio Rentals in LA, While its in fair shape cosmetically its got enough wear that I would say it must have been a pretty popular rental unit. I'm glad to have it.

Hello. First post.

I have a working 1996 Rumble Bass Stack (head and 2 410 HF cabs).

I had a bit of an issue with crackling and the volume going up and down. Checked the tubes which were original and fine. Reseated the multi pin amp to chassis connector a few times. The Amp worked for about a day and then the noises came back. I decided that the next logical step before taking it to the shop was to clean and lube the pots - although none of the pots were actually scratchy. Which I did. I also tapped and probed all of the caps and resisters with the unit while running and none of them were particularly microphonic or intermittent. These units seemed to be designed to be field serviced and for whatever reason Fender used 148 "Fast-On" Connectors! (Spade terminal connectors) to connect various sub assembly's to the main circuit board. While the unit was apart I made point of going through and rocking each connector to ensure it was making good contact. A bad connection here is going to act exactly like a cold solder joint. Its worth taking your amp apart and checking these connectors. My amp has been flawless since July of 2010 After doing this. Normal precautions about working on high power amps apply. It worked for me and hopefully helps someone. I've never played through a vintage Blue Line SVT but this thing has noticeably better tone then my mid nineties SVT CL 810HE.