[Amps] 813 efficiency

[Carl]

That was done in the bigger commercial rigs back into the 30's.

Carl
KM1H


----- Original Message ----- 
From: "ZL2AAA" <zl2aaa at paradise.net.nz>
To: "Mike Lord" <k4elv at bellsouth.net>; <amps at contesting.com>
Sent: Friday, February 22, 2013 3:17 PM
Subject: Re: [Amps] 813 efficiency


> From memory a GE Ham paper had this info and I think the answer was to tap 
> the tuning cap along the 10m tank coil.Morrie
>
>
> ----- Original Message ----- 
> From: "Mike Lord" <k4elv at bellsouth.net>
> To: <amps at contesting.com>
> Sent: Thursday, February 21, 2013 9:18 AM
> Subject: [Amps] 813 efficiency
>
>
>> Some time ago (maybe 2 years) there were comments filed on this site 
>> regarding increasing the efficiency of the 813 tube on 21 - 28 mhz.  I've 
>> looked through my history of this group but failed to find a reference. 
>> I also checked some GE Ham News articles that I've saved.  I realize the 
>> tube wasn't designed for this spectrum.  However, I do seem to recall 
>> some references being made on this site based upon personal experiences. 
>> I really don't intend to waste the groups time, but I sure would 
>> appreciate any circuit suggestions that would lead to increased 
>> efficiency of this tube.
>>
>> 73, Mike K4ELV
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