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Michael
Begin forwarded message:
From: Michael Babineau <[EMAIL PROTECTED]>
Date: November 26, 2005 10:26:19 AM EST
To: wayne burdick <[EMAIL PROTECTED]>
Cc: [email protected]
Subject: re: [Elecraft] KX1 on AAAs or Lithium Polymer?
Wayne :
I attempted to do exactly what you have with AAA cells but I ran into
difficultly sourcing
AAA holders that would fit on the additional KX1 bottom cover that I
purchased for
this project. I may however. have been trying to squeeze 10 cells in,
I can't quite
remember.
Once thing I have discovered is that AAA Lithium cells seem to be more
expensive
than the AA ones ! At 5 to 8 hours of operation that doesn't make AAA
Lithiums
very cost effective.
The problem with NiMH cells is the lower voltage, plus the rather
rapid self-discharge
rate. I'm not very familiar with LiPo technology so I don't know how
it fares in this respect.
My vote goes for the LiPo pack. I think in the long run it would prove
to be a more
cost effective solution. Users could always fall back to the standard
back cover with AA
cells in the event of longer duration outings. Being able to charge
on-the-fly with
a small Solar Panel would be a great idea. BTW, I have a small 5 W
Coleman panel
that folds into about the same space as a small hardcover book, it
would be perfect
for this application.
I think that Paul W0RW has being using his own homebrewed LiPo pack
quite
successfully for a while with his KX1.
I for one would certainly welcome an alternate internal power source
for the KX1 that
would allow higher power out for a shorter time period than the
standard 6 X AAs.
Most of my portable and /PM outings are less than a day in duration.
This would be
great, especially for KX1 /PM operation as it would mean one less wire
(no external
battery pack) to get tangled.
Michael VE3WMB
P.S. How does LiPO technology do in cold weather ? I am assuming it
holds up fine like
non-rechargable Lithium cells, otherwise Paul W0RW wouldn't be using
it in CO
during the winter ;-) .
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