Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: dwp on July 20, 2010, 09:46:50 pm

Title: pop in a D'lite build, who's in Jacksonville?
Post by: dwp on July 20, 2010, 09:46:50 pm

Hello all, anyone in Jacksonville? I just shipped my "audio beacon 40" accross the country, and amp arrived safely except now there is a pop that occurs in one-two minute intervals, only heard on idle. I had a lot of trouble taming this amp, thought I got it squared away. It's pretty much a hosed D'lite, two 6L6, two relays, turret board construction, if it persists I was wondering if anyone here is in Jacksonville, Fl, who could maybe take a look and a fix. There's no other ill function, dude is really pleased with the amp, pop is bothering me as much or more than it is bothering him so far.
Thanks in advance, dwp
dwpatte at A O L

Title: Re: pop in a D'lite build, who's in Jacksonville?
Post by: phsyconoodler on July 21, 2010, 11:26:23 am

a bad preamp tube will pop sometimes.Try another set of preamp tubes,or just swap out one at a time.If it works you save yourself the tech charges.If it doesn't,you have nothing to lose.

Title: Re: pop in a D'lite build, who's in Jacksonville?
Post by: JayB on July 21, 2010, 03:28:05 pm

Could be something that is plugged in or on the same mains wiring. Try a different wall socket.

Title: Re: pop in a D'lite build, who's in Jacksonville?
Post by: dwp on July 21, 2010, 06:02:07 pm

thanks for the replies, still waiting to hear back on the tube changes. The problem I was having that I thought I fixed was/were the ground at the input jack/preamp end was alive. Like highly active risdual current on the grounds. Or static electricity, or leakage, building up to a point of discharge, "snap". (preamp end of board and input jacks tied to chassis together per Doug's scheme)

I thought I fixed this once, it is back, or maybe not, maybe it is tubes......