Vox AC15C2 - 1 St Stage Tube Oscillation Test Knobs Setting:; Reverb Oscillation Test Knobs Setting

VOX AC15C1
1
st
stage Tube Oscillation Test knobs setting:
Knob Posittions
MASTER TREMOLO REVERB TOP BOOST NORMAL
VOLUME TONE CUT DEPTH SPEED LEVEL BASS TREBLE VOLUME VOLUME
Max Mi n Min Min Min Mi n 3
O’clock
Max Max
x Input: Not connected.
x Confirm there is no oscillation, with this setting.
x When th ere is an oscillation, replace 1st stage tube with 2nd or 3rd stage tubes. If it
doesn't solve, try another 12AX7 tubes.
Reverb Oscillation Test knobs setting:
Knob Posittions
MASTER TREMOLO REVERB TOP BOOST NORMAL
VOLUME TONE CUT DEPTH SPEED LEVEL BASS TREBLE VOLUME VOLUME
Max Mi n Min Min Max Mi n Min Min Min
x Input: Not connected.
x Confirm there is no oscillation, with this setting.