#1
With a fixed bias amp, can you replace all the tubes yourself, or is it best to get a qualified tech to do it? I recently ordered all new tubes after conversing with the guys from Eurotubes, they should be arriving shortly.
Someones knowledge of guitar companies spelling determines what amps you can own. Really smart people can own things like Framus because they sound like they might be spelled with a "y" but they aren't.
#2
It should be fine. Just firmly pull the old tubes out, and push the new ones in.
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