Standby on tube amp (not the usual "how long" question)

[Guest]

When I have played and put my Bluesbreaker into standby it sometimes does a quite loud "pop" sound... All since I bought it it has done that, but now it seems to do it alot more often now. I have turned the guitar volume to 0 before switching to standby.

I have quite zero technical tube amp knowledge so.

Why does it pop like that?
Is it something bad that I have to get fixed?

 

[Brow]

Re: Standby on tube amp (not the usual "how long" question)

Try turning the amps volume control/s to '0' aswell before turning the amp onto standby

 

[The Golden Boy]

Re: Standby on tube amp (not the usual "how long" question)

But it shouldn't do that. The standby should alleviate the transient "pop," not cause it.

 

[Scott_F]

Re: Standby on tube amp (not the usual "how long" question)

There are one of two things causing this....

1. The switch is dirty. Known to happen, especially on an amp with controls that face up.

2. There is often a small capacitor leading off the standby switch to ground. .0047 uf is what I am using in my Edana 45. This fender bassman 5F6A lay out shows a .005. Same thing.

http://schematicheavencom.secure.powweb.com/fenderamps/bassman_5f6a_layout.pdf

If this pop has happened all the time you've owned the amp and you are missing this capacitor, then have someone qualified install one. If it is just getting worse, I'm betting it's a dirty switch. Contact cleaner and some repeated up and down motions should clean it up. Or you'll need a new one.

Again IF YOU ARE NOT QUALIFIED TO OPEN UP AN AMP AND WORK ON IT, DO NOT. Or, Read up on everything amp safety related and LEARN first what not to touch, before you go exploring around. It's not that hard to learn, but the consequences of going in blind are potentially DEATH!

 

[Guest]

Re: Standby on tube amp (not the usual "how long" question)

Brow, I don't want to put the amp volume pots to 0 everytime. Reasons...beacuse the are two that react with each other since I have bridged the channels and because it's a long procedure to get the right sound at bedroomlevel because of the sensitive nobs :laugh2:

Okay! I'll just played for a while...

When I turned to standby and held my hand down on the strings on my tele....it didn't pop.

Last time (when I started this thread) I didn't hold my hand on the strings...and it did pop.

Is it possible that it could have anything to do with this...Static electricity or something. Have to ask since I don't know. But it was just something that I noticed.

Thanks Scott_F...and no need to worry! I won't open it up myself, that I know that even if it's unplugged from the wall there's still enough electricity in it to cause me a leathal shock! It's possible to bleed that caps and discharge it at leas a bit...but anyway's I won't open it up.

I will try with the contact cleaner though...