Marshall Amp Forum - View Single Post - Help. Lights on, no-one home

Adwex · 03-11-2008, 10:15 AM

Yes, a faulty tube could stop all sound.
No, removing and replacing a power tube does not require biasing.

I would get one preamp tube and use it to replace the first preamp tube in the amp. If that doesn't work, put the old one back, replace the 2nd one, etc....they're cheap and don't need to be biased.

03-11-2008, 10:15 AM	#6 (permalink)
Adwex Senior Member Join Date: Sep 2006 Location: Long Island, NY Posts: 795	Re: Help. Lights on, no-one home Yes, a faulty tube could stop all sound. No, removing and replacing a power tube does not require biasing. I would get one preamp tube and use it to replace the first preamp tube in the amp. If that doesn't work, put the old one back, replace the 2nd one, etc....they're cheap and don't need to be biased.