I looked around and couldn't find any small 14.0 volt switchers (I
did find a reference to one but it apparently has been
discontinued). I use a MFJ-4103 with my K2, but it doesn't put out
quite enough voltage to charge the battery. It uses a standard
desktop computer power cord and works fine with 240v input. I use a
small linear supply in the shack and have adjusted the output
accordingly. There are some 15 volt switchers for laptops available
and maybe a series diode or two would do the trick, depending on the
actual output voltage. Most of these are sealed assemblies and not
easy to modify internally.
Bob, N7XY
On Nov 17, 2007, at 10:45 AM, Dick Dievendorff wrote:
I have a 10-watt K2 with the KBT2 installed. The KBT2 manual
recommends a
14.0V power supply or battery life will be "reduced". It's easy to
put my
K2 on my station's 12V supply (which is really about 13.6V), but I
seek a
small switching power supply that I can adjust to 14V to power my
K2 in the
field and keep the internal battery topped off. I have a Gamma
Research
HPS-1A which is ideally sized, but I can't adjust the output
voltage (and
the filter caps are operating very, very close to their rated
voltage).
I thought of a Ramsey Kits LABC1 with a 20V wall wart, but I
suspect it
would be electrically too noisy to consider. I could charge the
battery with
it, but not while operating any radio in the near vicinity.
So I need a 14V DC 2A battery charger that's electrically quiet.
Are there
such things?
73 de Dick, K6KR
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