This Ampeg SVT Classic (SVT-CL) would work for a couple moments and then shut off.  The Standby-Power-Fault LED would turn from green to flashing red.

The 6550 output tubes tested good so we needed to troubleshoot the problem at the circuit board level.

To see photos of this amp's rehab,

• 6550 Cathode Resistors for the Ampeg SVT-CL are available in our Online Store:

Flameproof 10Ω, 2W, 1% Resistors

Additional Resources:

Schematics for the Ampeg SVT-CL amp

^®See trademark owners  HERE.