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

[G. Lofstead]

For those who do not know.
The 6L6 is basically an 807 without a plate cap...

In the 50's folks used PushPull metal 6L6's and placed them upside down
in water and ran 100 W AM modulated on 80 M phone..

Jerry
W3CDE



On Monday, July 14, 2014 11:23 AM, Glen Zook via Milsurplus <milsurplus at mailman.qth.net> wrote:
 

>
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>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:
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>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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