pulsing tube glow

Anchorman · 03-02-2008, 05:44 AM

Guys

I just noticed a pulsating glow in one of the el84s in my Marshall 2061.

It glows with greater intensity when played loud and less intensity when played quietly. The glow of the other output tube stays constant all the time.

The amp still sounds OK but this can't be normal so I think I'll change it out.

Anybody else see this kind of thing?

drewbertca · 03-02-2008, 07:20 PM

I have but usually it was accompanied with other issues like bad sound....anybody else?

Anchorman · 03-03-2008, 03:34 AM

Actually . . . I checked with my amp tech and he says the pulsing is normal.

However as it is only happening on one tube, there is a good chance they are unbalanced.

so now I feel doubly stupid

03-02-2008, 05:44 AM	#1 (permalink)
Anchorman Senior Member Join Date: Oct 2007 Location: Australia Posts: 262 Thanks: 0 Thanked 0 Times in 0 Posts	pulsing tube glow Guys I just noticed a pulsating glow in one of the el84s in my Marshall 2061. It glows with greater intensity when played loud and less intensity when played quietly. The glow of the other output tube stays constant all the time. The amp still sounds OK but this can't be normal so I think I'll change it out. Anybody else see this kind of thing?

03-02-2008, 07:20 PM	#2 (permalink)
drewbertca V.I.P. Member Join Date: Dec 2007 Location: Timmins, Ontario, Canada Posts: 1,990 Thanks: 4 Thanked 2 Times in 2 Posts	Re: pulsing tube glow I have but usually it was accompanied with other issues like bad sound....anybody else?

03-03-2008, 03:34 AM	#3 (permalink)
Anchorman Senior Member Join Date: Oct 2007 Location: Australia Posts: 262 Thanks: 0 Thanked 0 Times in 0 Posts	Re: pulsing tube glow Actually . . . I checked with my amp tech and he says the pulsing is normal. However as it is only happening on one tube, there is a good chance they are unbalanced. so now I feel doubly stupid Last edited by Anchorman; 03-04-2008 at 07:01 AM.

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