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Post by squeallydan on Mar 27, 2006 8:39:18 GMT -7
I got a used Maz Sr. NR. It is about 1 to 1/2 years old. The more I have giged with it the better it sounds, but it still has all the original tubes. I was thinking about changing them. I went to a local dude and he said unless they were causing problems there was no reason to change them. Anyways, I was wondering if I should cahnge all of them, or just the EL84's or what? THANKS!
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Deleted
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Post by Deleted on Mar 27, 2006 11:08:41 GMT -7
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Post by squeallydan on Mar 27, 2006 12:01:30 GMT -7
Thanks.
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Post by squeallydan on Mar 28, 2006 7:34:28 GMT -7
When do most folks normally change tubes? Power tubes? Preamm tubes? Rectifier?
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Deleted
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Post by Deleted on Mar 28, 2006 13:22:33 GMT -7
Hi Squeallydan, this might help. I usually change out tubes the moment by ears here a difference in the way my amp usually responds. When you change out your power tubes it is a good idea to change out your phase inverter at the same time (tube closest to the power tubes). Hope this helps. www.guitarlessonworld.com/resources/repair/tube.htm
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Post by billyguitar on Mar 28, 2006 13:25:39 GMT -7
Output tube wear can happen gradually, you may not notice the degradation. Swap 'em out, they're cheap. You'll be glad you did.
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Post by myles on Mar 28, 2006 13:28:14 GMT -7
If you change EL84 tubes in a MAZ Sr, Mazerati, RxES, Stingray after 300 hours you will notice a difference even if you thought there had been no change before. In some Matchless amps and Bad Cat amps I change output sets every 10 shows and notice a change.
I measure the phase inveter as I know what they measure when I put them in. It depends on the amp, if there is a master volume or not, how hard it was played, and what the output tubes are ... but some amps can have the phase inverter last a very long time ... others I change about every other output tube change in 6L6 and EL34 amps as a rough rule. The Z amps are pretty easy on phase inverters for the most part.
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Post by squeallydan on Mar 28, 2006 15:31:17 GMT -7
Does that mean I could possibly get away with just replacing the quartet of EL-84's?
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Post by myles on Mar 28, 2006 18:26:33 GMT -7
Does that mean I could possibly get away with just replacing the quartet of EL-84's? Well, if in a year and a half of use the amp was never used more than a few hours a week. Maybe just replace the output tubes but have a spare 12AX7 and swap it into the PI slot and see if it made things better.
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