[Boatanchors] Troubleshooting linear amplifier

[Bry Carling]

I wonder if anybody can give me any tips on troubleshooting a nonresident part network in a TENTEC Centurion 422 amplifier.

It does not seem to resonate of the right frequency. I have tried many things and is coming down to possibly being a bad band switch but how do you troubleshoot that in place?
The coupling caps are OK. The plate and load tuning caps are tuning OK. It just doesn't resonate on any band.

Best regards - Brian Carling
AF4K Crystal Co.
117 Sterling Pine St.
Sanford, FL 32773

Tel: 321-262-5471