Not trying to put you off but you can kill yourself if you touch the wrong thing in a tube amp. Like a course at the community college or whatever. I would not try that unless you have some serious electronics training. Some amps are easy to bias others are a pain. I would get some books at the library and read up on tubes. I do change out my tubes myself with the knowledge that if an expensive Marshall head blows in my face it's my responsibility and I have to pay big bucks to replace or repair it. I would take it to a tech if you don't know what you are doing. As long as you get the correct tubes it should be OK but if something goes wrong don't blame me. AC30 class A may be self biasing I don't remember. THey are easy to pull and replace but you may want it biased by a tech. I don't remember what preamp tubes are in the AC30 but it should have EL 34 power tubes. You can look at then and they should tell you what you need. Pedals I have built myself from GuitarPCB to further enhance my sound scape. Other useful tones ala REM, Tom Petty are easily obtained and sounds great with D.I.Y. Great for Classic Rock from the 60s and 70s.
the little tubes are preamp ect and the big ones are power tubes. Vox AC30C2 (Black) One of the best Tube Amps I have ever owned That is a lot. The tubes go in the back take out the screws and remove the back of the amp the tubes should be plainly visable in fact on the AC30 I think you can see them through a screen of sorts. If you don't know anything about tube amps you should have it retubed by a good amp tech. You should post this in the Ask Miles thread at the top.
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