I don't use a booster either. I run from solar charged RV battery at
the cabin. when I see that the voltage is getting low (below 12V)
I reduce power to 50W and at 11V I go to bed. The trick here is
short heavy supply cables. I have about 6 feet of 10 AWG with a 12
inch 12AWG jumper at the rig. I found that the 10AWG into the rig
was to stiff and would pull out if things were moved. except for only
once on PSK that I think was a problem at his end not mine, I have
never had complaints of splatter or degraded audio even when the
voltage aproaches 11V.
David Moes
VE3DVY
>
>
> Bob,
> Not sure why you'd need a boost regulator. The K3 is one of the
> very few
> HF transceivers that specifies it will work fine down to 11v. I've
> used
> mine for years from a 12v SLA with no problems at all. Use 100AH
> SLA(wheelchair battery) at home (use Powergate to charge/control
> voltage),
> so most of the time K3 supply is sitting at 13.8v. However, I often
> unplug
> AC when storms are near. I often forget to plug AC back in and the K3
> runs
> on 12v for weeks of daily nets before I notice low input voltage.
> (Couple
> of hours a day at 100 watts tx, SSB).
> When camping with Boy Scouts, I usually use a 26AH SLA. Never had
> a
> problem with that either. However, I usually run around 40 watts
> power to
> help conserve energy. That's usually just a weekend.
> If you want to be able to run another brand transceiver from
> battery
> power, then, yes, you do need the boost regulator. Elecraft rocks!
> Oscar, WB5GCX
>
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