[Amps] Hunter 2000c Low Output.

[Carl]

For starters there is no input network in that amp unless it was added 
later. If this is a recent purchase it might explain the high VSWR.

We are talking about a 70's amp and if those filter caps are original I sure 
suggest replacing them before serious damage occurs.

However the 3400V has me wondering as its far from what it was built with 
which is about 2200V key down. The original PS only has 6 caps. What do you 
know about this amps history Cam?

"Cooking" those tubes does absolutely nothing. The getter is a coating on 
the anode and has to show color to work.

Carl
KM1H




----- Original Message ----- 
From: "Mitch Cox" <ww4cox at embarqmail.com>
To: "Charles Hedrick" <cchedrick at gmail.com>; <amps at contesting.com>
Sent: Sunday, July 17, 2011 12:30 AM
Subject: Re: [Amps] Hunter 2000c Low Output.


> The first thing I would be looking for after first checking the incoming 
> AC voltage would be an open rectifier or capacitor in the power supply 
> section. But first you need to make sure that the incoming line voltage is 
> where it should be. From the report of a bad match between the radio and 
> amp you almost would want to look in the bandswitch section of the tuned 
> input if one exists but that would have no effect on the plate voltage.
>  ----- Original Message ----- 
>  From: Charles Hedrick
>  To: amps at contesting.com
>  Sent: Saturday, July 16, 2011 10:11 PM
>  Subject: [Amps] Hunter 2000c Low Output.
>
>
>  HI All,
>  This has me puzzled.  HV is 2800 down from 3400 which is normal in this
>  small town this time of year.  I noticed yesterday that the power level 
> was
>  fluctuating weirdly up and down. when tuning the amp into the dummy load.
>  So last night I installed new  3-500ZG's  and cooked them for 24 hours. 
> I
>  just tried the amp again and the power out is way down, the rig is seeing 
> a
>  high SWR.  Bad Tubes....I just pulled a pair from the AL-82 and got the 
> same
>  results.  I installed the new pair in the AL-82 and got 1300 key down 
> with
>  65 watts drive.  The HV on the hunter doesn't fluctuate, and I'm .38 amp 
> and
>  300 output with HV dropping to 2400 at key down.  The AL-82 is seeing the
>  same HV drop by the way, but handles it better, 85 watts drive is 1500 CW
>  with the new tubes.  Parasitic Suppressors bad?   Stumped here.
>  Thanks,
>  Cam
>  WA4JKW
>  NCS MMSN
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