Question about Peavey Audio Players & Recorders
All lights stay on and when amp is silent, lights are green. The fan speeds up when the sound plays and slows down when the amp goes silent. Fuse is fine, I changed it out to a new one
The fan is probably thermally controlled. This is done so that there is no fan noise when the volume is low. Once there is sound coming through, if the output stage heats up enough, the fan is turned on. It sounds like one or more of the output transistors is experiencing thermal runaway. The buzzing sound is most likely due to protection circuitry. You would need a schematic and a voltmeter to check this at the very least. If you are not inclined to perform the repair yourself, I would suggest taking it to a local guitar shop that repairs equipment. The smaller shops might have a tech make an initial assessment on the spot, which is something that the big chains are unlikely to do.
Posted on Jun 13, 2014
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Posted on Jan 02, 2017
I have a classic 50/50 as well and re-tubed it with JJ el84s, vintage teslas and mullard 12at7s. As long as you replaced it with EL84s, I can't imagine that the output would be increased enough to damage the OT. When I got my 6505 Combo, one of the 6L6s was bad, and it kept blowing fuses and howling like a banshee. I would think that an OT problem would result in a significant loss of output...or none at all. I've gotten DOA tubes from a few places. I would suggest swapping each tube out 1 by 1, until you find it...if that is indeed the problem...before you pay the cash to have it worked on.
Posted on Oct 29, 2007
SOURCE: bass amp settings
For rock and slapping you are going to want to set the Bass and Treble controls high and the Mids low. For music such as Jazz you are going to want more mids so that your sound will be fatter. If there is a button marked "Mid-Scoop" you'll want that on when slapping.
Posted on Nov 08, 2007
SOURCE: Peavey KB 300 amp problems
You have have been unfortunate enough to experience an uncommon failure. The bass driver has failed. It is a Black Widow that can have the basket/cone/voice coil assembly replaced as a complete unit. The magnet unbolts from the basket and you bolt on a new one. Classic field service designed product. You will be able to get a new basket from a Peavey equipment stockist. Just ask for a 15' Black Widow replacement basket They cost about $180 here in Australia and you can easily change it yourself. Good Luck and happy jamming.
A FixYa rating would be great for my tech tip to you. Cheers
Posted on Mar 08, 2008
Hi lespaul 2001
Have you checked your HT fuse. If it fails it will have lights but no sound. Pays to check fuses with a multimeter, as they sometimes look good, but can be dud.
A faulty or intermittent lead speaker box lead will aldo make the head blow fusesCheck the lead to your speaker box also. Dont use a stomp box patch lead. be sure to use a decent speaker lead with quality jacks(switch craft) and at least 16 gauge cable. Ernie Ball make a decent speaker lead for guitar rigs.
If the head keeps blowing fuses, I would suggest that you change you output tubes(4 x 6L6GC). I recommend Electro Harmonix, by Sovtek as a budget conscious option. Get them as a gain matched quartet.
If it does not have a blown fuse at all... then get back to me here and we can do some more tests.
I am more than happy to answer any other questions you may have about it, just give me a hoy :) If you are still unsure, or have problems, then before you give a rating for this advice, please get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.
Posted on Jun 16, 2008
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