Posted by
wayne burdick on
URL: http://elecraft.85.s1.nabble.com/Problems-with-K2-4502-tp371370p371372.html
Hi Fred,
Power output varies from K2 to K2, but if you feel that it's low, Gary
can send you a list of things to check.
Regarding the solar-charging issue:
You can probably increase the output of the solar charger a bit. For
example if there's a diode in series, you can replace it with a 95SQ015
type, which has very low voltage drop. We should have them in stock
(send a request to
[hidden email]). If the solar charger is
regulated, there may a voltage trimming adjustment. With no charge
regulator, the open-circuit voltage from a solar panel is generally
well above 13.7 V.
You can continue charging the K2's internal battery as long as the
voltage is at 14 V or higher, *or* if it's steadily *rising*,
indicating that the battery is pulling the voltage down as it charges.
A depleted battery may drag the solar panel down to 12 to 13V during
initial recharge, depending on how large a panel you have and how much
insolation is available. (It's 800 watts per square meter at the
equator in full sun, and you won't need that much :)
Further details on solar charging can be found in back issues of QST,
on the web, and probably from the manufacturer of your panel.
73,
Wayne
N6KR
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