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What causes power tubes to over heat in peavey valveking 100

I have a peavey valveking 212 that the 6L6's suddenly started over heating in. Thanks. Any ideas

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Posted on Jan 02, 2017

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SOURCE: My son has a Peavey valveking 212 keeps blowing

Check w dealer about warranty - I thought it was 2 years? Great amps when they're working! I love my tone on it! :)

Posted on Jan 18, 2011

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SOURCE: my peavey valveking vk 112 is making a whistling

A high frequency feedback can be very hard to isolate without test equipment... you MIGHT have a "microphonic" tube that picks up from the speaker and feeds back... Tap the small tubes with a pencil and see if any of them "ring"... gentle taps of course... If one seems sensitive, swap like numbered ones around to see if you can find a happy place for them. Electrically there could be a bad ground inside causing these.
I notice you have 4 tubes in the output... REMEMBER when you used matched pairs... the members of the pairs do NOT go side by side all the way down the string...
Put each tube of a matched pair at the ends of the string of four, and the other pair as the middle two...

Posted on Feb 12, 2011

KeithOB
  • 59 Answers

SOURCE: what ohm selection and which

that depends on your cabinet(s). if you have an 8 ohm cabinet you want to use your 8 ohm out. if its a 16 ohm cabinet you want the 16 ohm out.. etc.. etc. etc.. owners manuals will tell you these specs

Posted on Sep 01, 2011

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My peavey valveking vk 112 is making a whistling noise I changed the 2 main tubes and it is still doing it what coud be the problem and how can i fix it


A high frequency feedback can be very hard to isolate without test equipment... you MIGHT have a "microphonic" tube that picks up from the speaker and feeds back... Tap the small tubes with a pencil and see if any of them "ring"... gentle taps of course... If one seems sensitive, swap like numbered ones around to see if you can find a happy place for them. Electrically there could be a bad ground inside causing these.
I notice you have 4 tubes in the output... REMEMBER when you used matched pairs... the members of the pairs do NOT go side by side all the way down the string...
Put each tube of a matched pair at the ends of the string of four, and the other pair as the middle two...

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1 Answer

I have a Peavey ValveKing 112. It seems like it just takes forever for the tubes to warm up. For like the first hour that it's turned on the clean channel seems fine, but the second channel doesn't work....


Buy ONE new 12AX7 and try it in location V1 and if it doesn't help, try it in V2. This tube has TWO heaters in it and if one is intermittent that could cause your problem. The vibration MIGHT be "fixing" a briken heater after some time.
There are MANY components that could cause this, so you might have to take it in for repair if it isn't a simple tube problem. Since it works on the clean channel, V3 should be OK.

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