[Elecraft] KBT2 charging question

[Don Wilhelm]

Mike,

The 'float voltage' that must be applied to an SLA battery terminals should
be 13.8 volts to maintain a full charge on the battery.  The K2 has a series
diode in the power supply line for reverse polarity protection - that diode
drops about .2 volts.

What that means is: to obtain 13.8 volts at the battery terminals, one must
connect a supply of 14.0 volts to the K2 to maintain full charge on the
battery.

There is an intenal pot in the Astron to adjust the output voltage, so it
may be a simple matter to increase the Astron voltage - locating the correct
pot may be more of a challenge, be certain you adjust the proper pot.

73,
Don W3FPR

> -----Original Message-----

>
> The KBT2 manual says 14.0V +/- 0.2V is needed to charge the
> battery.  Does that
> mean something like an Astron putting out 13.8V is enough or is
> that too close
> to the edge?  I seem to recall someone saying it was not enough
> ideally but
> can't find the note now...or maybe I'm remembering incorrectly!
>
> Thanks for any info,
> Mike  ab3ap
>