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Re: [Amps] Commander Hf2500E

To: Joe Barnes <>
Subject: Re: [Amps] Commander Hf2500E
From: Roger <>
Date: Tue, 04 May 2010 02:54:02 -0400
List-post: <">>
Have you checked the output power on another meter seperate from the one 
in the HF2500E?
If every thing looks OK with the exception of the output power there's a 
good chance the problem lies with the sampling network.  OTOH a 
discolored tube doesn't sound good.  Discolored, how?


Roger (K8RI)

Joe Barnes wrote:
> 2 questions about my Commander HF2500E, 
> 1- does anyone have any experience changing out the noisy open frame relay 
> and replacing it with a vacuum relay?
> 2- tonight when I was tuning up on 10 meters for the first time in a long 
> time I noticed the SWR went way up on the beam. I lowered the drive to see if 
> it was just some condensation or something like that in the feed line 
> fittings, however something in the amp made a frying sound and the gain on 
> the amp went to about 3db. One of the tubes is discolored, the plate voltage 
> is normal. The plate current looks to be about right when I key the amp 
> however it just isn't making any power. 
> It should make way more power than this even on one tube.
> Any help would be greatly appreciated.
> 73, Joe N4JBK
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