Tubes; Troubleshooting - SUPRO 1605R Reverb User Manual

2.5

Tubes

Each Supro tube amplifier is a 100% analog, 100% tube amplifier. There are NO solid state (transistor)
devices in ANY audio signal path.
Power
Transformer
2.6

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. Make sure all knobs are turned
up past zero and that the standby switch is set to operate. As this is a tube amplifier, 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 info@suprousa.com.
Viewed from the rear of the chassis
Supro 1605R Reverb
6L6
ECC83
V4
V2
Rev. Make-up Gain
Power Tube
ECC83
Preamp
ECC81
V2
Reverb Reverb
Reverb
Return Send
Driver
9
V1
Output
Transformer