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> From: Michael Babineau <
[hidden email]>
> Date: November 26, 2005 10:26:19 AM EST
> To: wayne burdick <
[hidden email]>
> Cc:
[hidden email]
> 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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