On 5/12/2009 9:04 AM, Vic K2VCO wrote:
> When operating a QRP K2 in the field with a battery, how low can
> the battery voltage go before there are problems with signal
> quality?
> Will it work down to 10.5v?
FWIW my experience with a K2/100 operating at 30-40 watts is
that below 11.5V it goes sour.
I had to arm-wrestle Trojan Battery to get ampere-hour
discharge curves down to that level for my 27AGM batteries. The
industry standard for ampere-hour discharge ratings is down to
10.5V. They finally admitted that the discharge capacity down
to 11.5V is about 70% of the 10.5V rating.
One of my professional colleagues is a national expert on
battery supplies for communication sites and he concurs with
that figure for that type of battery.
-- 73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402
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