Thanks to everyone for the suggestions. Unfortunately, physical size is
an issue, which is why I mentioned the coin cells. I don't know if a
coin cell holder will fit in the available space, and I had thought of
that possibility, but I will investigate further. The cells can be no
larger than the 2032 size. However, I will investigate mounting the
memory cells at another location inside the set and running wire leads
to the original location. One of my applications is inside a FT-100D
transceiver. Other sets probably have more "elbow room" and for those
the battery holder is a good idea. And yes, I can purchase coin cells
in any size or quantity I want at the local market, but none that have
solder tabs or PC-mount pins. Thanks again for your suggestions.
We now return you to your regularly scheduled reflector.
- Jim, KL7CC
On 11/1/2012 7:38 PM, Steve Jackson wrote:
> Jim
>
> I saw some incorrect answers fly about on the Elecraft reflector. One
> was good: to buy the cell holder and then buy the CR2032 or similar
> cells at the drugstore.
>
> Another answer you didn't get is to use a pair of L91 AA cells in
> series. If you download the spec sheet for that cell you will be
> /astounded /that we have a commercial product widely available in the
> consumer market that is THAT terrific. Look at the longevity, pulse
> ampacity, temperature specs, etc., all simply amazing. Will blow away
> any other solution at 12 years plus.
>
>
http://data.energizer.com/PDFs/l91.pdf>
> There are programs you can use to calculate a Joules-reduction to show
> how long your service life will be but basically for back up you're
> limited by shelf life specs and also the ability of the contacts in
> the cell holder to maintain ohmic integrity.
>
> Steve KZ1X/4
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