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!
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.
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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