Quiana and Fandango 1.0 p 22
Turn off the amp, and allow the tubes to cool. Now pull out the troublesome tube and
replace it with one of the same value (that is, if you're pulling out a 12AX7, replace it
with a 12AX7).
Make sure that the tube is oriented correctly when pulling it out or putting it back in. If
you look at the end of the tube and the socket, you'll notice that the nine pins are
arranged in an incomplete circle. Always make sure the pins are aligned correctly.
Never force a tube into its socket.
Remember to put the sleeve back on after you check or replace a tube.
Power amp tube first aid
Like Preamp tubes, power amp tubes can go bad or wear out. Your Bonehead has four
power amp tubes, and if one goes bad, they should all be replaced. This assures
optimum output and tone.
If a power tube shorts out, the HT Fuse will be blown. Remove power from the amp and
replace the fuse before doing the following:
