Re: KPA-1500 Efficiency As A Function of Input Power

Posted by Jim Brown-10 on Aug 17, 2018; 6:52pm
URL: http://elecraft.85.s1.nabble.com/KPA-1500-Efficiency-As-A-Function-of-Input-Power-tp7644445p7644463.html

On 8/17/2018 11:20 AM, Wes Stewart wrote:
> Something to bear in mind in this discussion is that we run our
> equipment in ICAS, not CCS.  Even in a contest situation we probably
> only transmit half the time.  During the off (RX) time the amp isn't
> drawing any plate, collector or drain current, nor is it drawing much
> current on CW, key up or SSB between syllables. RTTY is a "continuous"
> mode without the syllabic breather, but it's still intermittent.

Great analysis. Long-winded ragchewing on AM or keydown digital modes is
probably worst case for dissipation. I don't do either, so my worst case
is WSJT modes on 6M (6M because efficiency is lowest), or RTTY
contesting when I'm running (that is, CQing) with few answers.

73, Jim K9YC

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