[Boatanchors] Troubleshooting linear amplifier

[Bry Carling]

It's getting drive OK.

I can increase the drive power slowly and the plate current goes up. It just does not resonate
in the PI network OP.

> From: w5jo at brightok.net
> To: Boatanchors at mailman.qth.net
> Date: Sun, 10 Apr 2016 09:57:01 -0500
> Subject: Re: [Boatanchors] Troubleshooting linear amplifier
> 
> Try cleaning the bandswitch with Qtips and denatured alcohol thoroughly.   Be sure to clean the contacts on the input network if it has one.
> 
> Jim
> W5JO
> 
> 
> -----Original Message----- 
> 
> 
> 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
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