[Elecraft] KPA-1500 Efficiency As A Function of Input Power

[Jim Brown]

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