[Amps] Using old amps on WARC query

[Carl]

The Clipperton L had 2 different chokes, the short fat one that requires the 
top 3-4 turns removed and also used on the MLA-2500, DTR-2000L and some 
others. The later is a tall solenoid wound which appears to be purchased 
from Heath as it is identical to the SB-1000. Also used on the Clipperton 
QRO.
It appears to work OK on WARC's as tested here but I wouldnt push the power 
beyond 600-700W or so as the bandswitch is now the weak link and the tank 
circuit values are way off from optimum. Operate in the CW position.

Carl
KM1H



>I am no expert on this. I have a Dentron Clipperton-L that I had applied 
>the 10M fix to it years ago. But I fried the parasitic suppressors when 
>working WARC bands. At the suggestion of several on the group I changed the 
>RFC over to an Ameritron RFC and suppressor assembly and that fixed the 
>problems. Apparently the original Dentron RFC was not very effective on the 
>WARC bands. Not sure that applies to the DTR-2000.
>
> 73, Larry  W6NWS
>
> -----Original Message----- 
> From: Charles Harpole
> Sent: Sunday, June 30, 2013 7:39 AM
> To: amps at contesting.com
> Subject: [Amps] Using old amps on WARC query
>
> 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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