Return circuits
factory
5) Springs are stuck
5) Tap the reverb tank with
your hand.
Channel selector
Footswitch does not
change channels
1) Channel Selector on
amplifier set to channel 1
position
1) Use the panel mounted
channel selector to set the
amp in channel 2 (indicated
by the green L.E.D.)
2) Defective footswitch
2) Substitute footswitch with
one known to operate pro-
perly. If found to be defec-
tive, return footswitch to
factory or dealer for repair
3) Defective internal
channel switching in amp
3) Return amp to dealer or
factory for repair
Feedback, ringing
1) Master Volume and/or
Overdrive controls set too
high
1) Lower levels
2) Too many high gain type
modules used*
2) Use lower gain modules
or play at lower levels
3) Microphonic pickups
3) Wax pot pickups
4) Microphonic tube sound
4) Use FET module in first
position
* It is possible to use high gain/high volume configurations, but it requires using tubes
that are less susceptible to ringing such as Polish
12AX7.
Although these tubes ring
less, they usually do not have quite as good noise and musical qualities. (See tube
section)
