The Comets tremolo is derived from the original Supro Model 24. This classic circuit modulates the
amplitude of audio signal coming from the preamp, by modulating the bias of the preamp tube.
Supro amps are some of the most dynamically sensitive guitar amplifiers ever designed. The player
is able to access a myriad of sounds within this amp by turning the amp volume up to the point of
glorious overdrive and simply controlling the strength of the signal right from the volume knob on the
guitar.
2.4
Tubes
Each Supro tube amplifier is a 100% analog, 100% tube amplifier. There are NO solid state (transistor)
devices in
ANY
audio signal path.
Viewed from the rear of the amp
12AX7
Preamp
Reverb
Make-up
Gain
12AT7
Reverb
Driver
12AX7
Power Tube
6L6
Tremolo
12AX7
V1
V2
V3
V4
V5
2.5
Troubleshooting
Supro products have been designed for years of trouble free service. There are many unique protection
features to the design. If you are having difficulty, check the following:
No sound, but PILOT LIGHT is ON
Check to see that the speaker is plugged into the SPEAKER JACK (not the footswitch jack). Make
sure all knobs are turned up past zero and that the standby switch is set to operate. As this is a tube
amp, the tubes take approximately 1 minute to warm up before you will get sound. The STANDBY
switch should be set to standby for this warm up period.
No sound and the Lights are All OFF
Unplug the power cord and check the 2.5A, 250V fuse (rear panel).
If you have any further questions, our email address is
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