Re: KPA500 and SWR above 1.5:1

Posted by Geoffrey Downs-3 on May 11, 2011; 4:24pm
URL: http://elecraft.85.s1.nabble.com/Re-KPA500-and-SWR-above-1-5-1-tp6352561.html

The manual says the bargraph shows green ("normal") up to an SWR of 1.5:1,
yellow ("marginal") from 1.5:1 to 2.1:1 and red ("excessive") above that.
Does this mean no inhibition of output  by the protection system (and no
need for it) up to 1.5:1 but progressive reduction of output above? If so,
will the amp operate without damage in the yellow zone and what %
reductions in output might be expected up to 2.1:1? Also in what conditions
of SWR does the intelligent 2.5db output reduction apply; and at what SWR
does output shut off altogether - ie the REFL HI fault condition.

Apologies if these questions have already been answered, in which case
perhaps someone could refer me to where. I have looked at the manual and
searched back on the reflector without success.

73 to all

Geoff
G3UCK

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