Tom, that's a great idea,and it never occurred to me. However, it will
probably be years before I need to change the voltage again, so at this
point I doubt I'll bother. Thanks for the tip, though!
Cathy
Tom Hammond wrote:
Cathy:
For future possible adjustments... REMOVE the pot and reinstall it on
the SOLDER SIDE of the PC board... then it'll be on top where you can
easily access it! Saves a LOT OF HASSLE! And it's a SIMPLE one-time
task to perform.
If you do a lot of voltage adjustment (though few of us do), you could
always remove that PC-mount pot and replace it with a chassis-mount
pot (installed on the back of the case) attached to the PC board via
three wires.
73,
Tom N0SS
At 07:44 AM 11/3/2006, you wrote:
[EMAIL PROTECTED] wrote:
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
I adjusted my Astron to 14.1V output using the internal pot, but be
warned that it is a semi-major project. The pot is on the underside
of the small floating board IIRC; every time I wanted to adjust it, I
had to short out the large electrolytic capacitor in the Astron,
unscrew the board, pull it up, make a guess as to how much to adjust
it, screw it back down, power up the supply, check the voltage, see
that it's still wrong, power down, short out the cap, unscrew the
board....
There may be an easier way to do it but it wasn't obvious. I'd guess
that it took me a dozen iterations. I don't ever want to mess with
it again.
What was Astron thinking burying the pot where it can't be safely and
readily accessed just by removing the cover???
Cathy
N5WVR
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