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Battery Woes

Subject: Battery Woes
From: Steve Pelikan <>
Date: Thu, 26 Jan 2006 12:35:07 -0500
Hi everyone --- I'd like your sage advice about powering my trusty DA-P1.

When I got ready to fire it up a few days ago (Cardinals have been
singing here in S Ohio for several days) I found that the internal Ni-Cd
no longer holds a charge and my remaining external lead battery (from
EcoCharge) has similarly given up the ghost. These circumstances aren't
really unexpected; I've changed my car's battery at least once since I
bought the EcoCharges.

Rather than getting more NiCd or lead batteries (both pretty expensive
and also requiring special disposal ---and being "green" is a
significant consideration for me ---) I was wondering about hooking
together 6 NiMH D cells and somehow managing to plug the recorder into
them.

The internal NiCd that came with the recorder is listed in the Tascam
manual as 7.2V 1.4 Ah. and runs the thing for 90 minutes with phantom
power on.

 >>>Am I correct that 6 D cells rated at 1.2 V  and over 3000 mAh will
probably do about twice that when (connected end to end)? That is, V's
add and A's dont?

Assuming that this scheme should work in principle, I have the problem
of "getting the electrons into the recorder".  The power connectionon
the DA-P1 is a special plug I've seen nowhere else.  Its rectangular in
cross section and has 3 holes (connections) in it. The battery I'm
imagining has 2 wires (connected to + and -).

 >>> Any ideas on how to accomplish my connection? I could snip off the
plug that came with the ecocharge batteries, but would still need to
know how to determine which holes get connected to which wires (+/) and
what to do with the third connection which I presume is a ground of some
sort. (But wearing boots, I'm not grounded anyway?)

 >>>Finally, assuming all of the above considerations pan out, I'd
appreciate/suggestions instructions/useful leads on how to go about
actually putting these parts together in a
sturdy-yet-compact-and-reliable container that I could carry into the field=
.

I can't express how weak my understanding of both the electrical
considerations and the actual hands on stuff required to build and
connect things is --- especially compared to what most everyone in this
group seems to know and know how to do. So you can't possibly go wrong
by telling me elementary step-by-step kind of stuff!

THANKS IN ADAVANCE for any and all suggestions and instructions you can
offer. If this sort of topic is too boring for posting, I'd appreciate
emails anyway and will later summarize what I learn and describe what I
actually do and how it worked.

Steve P





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