[Amps] Using old amps on WARC query

[Carl]

I have a mid production 76PA 3 holer that needed a change. Havent seen any 
with a later choke which may have been from a 78 sold later as a retrofit.

Carl
KM1H


----- Original Message ----- 
From: "Joe Subich, W4TV" <lists at subich.com>
To: <amps at contesting.com>
Sent: Sunday, June 30, 2013 10:45 AM
Subject: Re: [Amps] Using old amps on WARC query


>
> I believe the early PA76 series amps *all* had plate chokes resonant
> at 25 MHz and will not work on 12 meters.  It's been a long time since
> I last looked at one.
>
> 73,
>
>    ... Joe, W4TV
>
>
>>> Please anyone can tell me the factors to consider, including burning
>>> tank components, when operating old linear amplifiers on the WARC
>>> bands, especially 12 meters.
>>>
>>> Alpha 76 PAC meaning the 3 tube version.
>>> TenTec Titan One
>>> Dentron DTR-2000
>>> ICOM IC-2KL
>>>
>>> All these amps have factory-type conversions to TEN meters already
>>> done. The Alpha has the swamping input taken out.  Other than that,
>>> all amps are stock.
>>>
>>> Thanks for all specific info... 73,
>>>
>>> Charles Harpole
>>> k4vud at hotmail.com
>>>
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>>
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