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

[Glen Zook via Boatanchors]

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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