Left channel cuts out [solved]

[jt]

The left channel on my crack cuts out after about 10 minutes. Swapped tubes and get the same result. Voltage check is ok. How can I troubleshoot this?

Thanks, Jay.

 

[NightFlight]

To start, swap the input RCA cables.

 

[Doc B]

Visually inpect every solder joint to see if you missed soldering one. Cutting out after a few minutes is usually something that happens because something expanded as the amp warmed up and shifted, losing contact.

If everything looks good, redo your voltages while in the amp is warm and post any big deviations from the figures in the manual. If you can find what is getting disconnected we can isolate the problem.

 

[jt]

I figured Doc was right about heat expansion so I re-flowed all the socket connections and terminal strip connections.
Fixed the problem.

Thanks for the help!

Jay.