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Author Topic: new valves  (Read 2379 times)

Tarzan

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new valves
« on: September 08, 2008, 04:15:01 PM »
OK, first of all, am I right in thinking that if the amp (I'm pretty sure it's the valves, but i'm not sure) is making a low humming sound that i need to replace the power valves?

If so, what 6L6s would you guys recommend for a Mesa Boogie F50?
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hamfist

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Re: new valves
« Reply #1 on: September 08, 2008, 06:45:56 PM »
Quote from: Tarzan on September 08, 2008, 04:15:01 PM
OK, first of all, am I right in thinking that if the amp (I'm pretty sure it's the valves, but i'm not sure) is making a low humming sound that i need to replace the power valves?

If so, what 6L6s would you guys recommend for a Mesa Boogie F50?

Most likely the hum is due to a faulty valve, but you'll only really find out by changing them out for new ones and seeing if the hum goes away. Start with the pre-amp valves (12AX7's probably), swap out one at a time with a known good valve. If that doesn't sort it out, then it sounds like you need to take it to a tech anyway, as to get new 6L6's will require the amp to be re-biased, and I'm guessing you're probably not able to do this. If that sorts it out, then great, if not, then it'll be in the right hands to sort it out.
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f.sardis

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Re: new valves
« Reply #2 on: September 08, 2008, 06:50:45 PM »
Can't go wrong with JJ valves. I changed all my valves a few months ago to JJ and I had no issues at all though I can only wish I had an amp like yours.
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HTH AMPS

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Re: new valves
« Reply #3 on: September 08, 2008, 10:01:29 PM »
Mesa use graded valves, so if you buy Mesa or Groove Tube valves you will not need to re-bias.
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