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Old 7th August 2003, 01:15 PM   #1
Bab is offline Bab
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Question Fender guitare tube

how can I veryfi the condition of tubes on my Fender guitare amplifier. I don't have a tube tester.

Tank you

Yves
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Old 7th August 2003, 01:25 PM   #2
halojoy is offline halojoy  Sweden
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Default Re: Fender guitare tube

Quote:
Originally posted by Bab
how can I veryfi the condition of tubes on my Fender guitare amplifier. I don't have a tube tester.

Tank you

Yves
I think the more experienced ones
are looking at the colors of the glow
when the tube starts to warm up and when it is warm.

They know how to see if there is anything that is
going to give up life soon.
I think tubes has not as long lifespan as transistors.
If one use slightly less power to heat the tube
it will live longer,
maybe at expense of some little prestanda.
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Old 7th August 2003, 01:49 PM   #3
316a is offline 316a  England
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Default Re: Fender guitare tube

Quote:
Originally posted by Bab
how can I veryfi the condition of tubes on my Fender guitare amplifier. I don't have a tube tester.

Tank you

Yves
Three solutions , first one obvious : find someone with a tube tester ! Second : avoid the issue and buy a complete set of new tubes (not recommended) . Third : measure the voltages between cathodes and 0V . You may need a schemetic for this with the correct voltages marked , also other components drifting with age (anode loads / cathode bias) may affect this . Go for option 1 !

316a
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Old 7th August 2003, 11:26 PM   #4
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Or option number 4, buy a new set of tubes because one day its going to have to happen anyway. If the new ones sound a lot better, then the old ones were getting too old. If you cant tell much of a difference, give the old ones a while longer.

-Chris
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Old 8th August 2003, 06:05 AM   #5
SHiFTY is offline SHiFTY  New Zealand
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What kind of tubes are they?

If they are 6V6s, just get some NOS ones. They are cheap as. I find the made in Holland ones from the mid 60s the best 6V6 for guitar.
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