[Boatanchors] Max Plate Dissipation- Can You Fudge A Little

Robert Moses rhmoses at earthlink.net
Mon Jul 14 19:19:10 EDT 2014


Settle for nothing less than 20 - 25 watts then!! LOL (Of course FM on
such a class C amplifier would be out of the question.)

On 07/14/2014 09:23 AM, Glen Zook via Boatanchors wrote:
> It is said that "olde tymers" sent CW at a pretty high wpm rate because a short "dah" turned the plate red and a long "dah" melted the plate!
>  
> Glen, K9STH
>
>
> Website:  http://k9sth.com
>
>
> On Sunday, July 13, 2014 10:42 PM, "w8au at sssnet.com" <w8au at sssnet.com> wrote:
>  
>
>
> At 07:48 AM 7/13/2014, David Stinson wrote:
>> A 6AQ5's max plate dissipation is speced for 10 Watts
>> in Class C service.
>> How long do you think I can get away with pushing it
>> up to 12 Watts?  Still staying within the max cathode current specs, 
>> but just barely.
> Dave:  Wouldn't worry about stressing the 6AQ5 since they are 
> plentifully available
> and not expensive.
>
> Check the 1939-1940 QST articles about the QSL (chassis size) one tubers called
> the QSL 40,  QSL 60, and the P-P QSL 100 by Fred Sutter, W8QBW.
>
> He used the 6L6 and got 40, and 60 watts out.  The P-P rig used two 6L6 and
> put out 100W with 600V on the plates!
>
> As long as you don't hold the key down too long, they survive, (for awhile)
>
> Perry   w8au
>
>     
>
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