[Amps] Duty cycle for processed SSB in contest conditions?

Bill Turner dezrat1242 at wildblue.net
Sat Feb 22 13:01:47 EST 2014


ORIGINAL MESSAGE:          (may be snipped)

On 2/22/2014 9:25 AM, Conrad Farlow wrote:
> The thermal impact of this is quite severe and I am trying to 
> calculate what is acceptable for SSB during a typical contest.

REPLY:

I would recommend you not try to calculate this, but rather measure it 
directly. Use color-changing paint or crayon and measure the temperature 
of the tube seals under those conditions. Start off with low power and 
work up to the point where the tube manufacturer's maximum 
recommendations are just barely met.

A calculation is only a guess because there are too many unknown 
variables. The paint or crayon will tell you exactly what you want to know.

73, Bill W6WRT



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