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Re: HHB Portadisc

Subject: Re: HHB Portadisc
From: Marty Michener <>
Date: Thu, 04 Sep 2003 15:36:45 -0400
At 03:13 PM 9/4/2003 -0400, Walt wrote:
>The numbers are a measure of voltage of the pac. They are pretty
>accurate if you are using a set of alkalines, which drop fairly steadily
>in voltage. Unfortunately NIMH don't drop much for the first 80% of the
>discharge. I start thinking replacing the pac when it's got down to 97%.
>And as I said will not go below 70% unless in the middle of a really
>valuable recording. Typically I replace the pac early so I won't get
>caught like that.
>  From my measurement of the Portadisc's current draw, it's not hard to
>see how the voltage is going to vary. With the full recording load I
>occasionally saw lows close to 200ma. There was far more variability in
>the load than I expected.

Yes, Walt, that explains why the numbers jump all over.  But mine are
frequently well below 70% for much of a recording, and get to 40 or 50%
before I need to switch.  I gotta check this and take notes (oh great, one=

more "experiment" needed for the equipment sake, ( ;^) ).

Maybe I'm a klutz, but I always have my hands and brain full making
half-way decent recordings, being stealthy and ID'ing my vocalizing
victims, without studying the erratic course of a bunch of numbers that
seem to follow almost no pattern, then plunge!

I certainly agree one shouldn't design a fast heat-producing charger into
the recorder, and I am grateful for your suggestions on the Maha MH-C401FS=

chargers!  Gotta try'n git me one or two.

my best regards,

Marty Michener
MIST Software Associates PO Box 269, Hollis, NH 03049  - Software that migrates with you.    http://www.EnjoyBirds=


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