Walt,
A NiMHy cell has 1,2v nominal. Five of them in series make 6v, the stereo
DATmic needs 5v to work well, it's only 1v to go and I consider that too
little. Using 5 cells also means that you don't get any warning. Within a
few minutes, the output goes from full to nothing.
Six NiMHy in series make 7,2 volts, which is sufficient. But to charge it,
the voltage of a NiCad 9v battery is too low.
It's a choise - using 5 cells to make it possible to use a NiCad battery for
charging, and pay for it by means of poorer distortion figures and lower
running time, or
being stuck with using dry-cells for charging. Dry-cells have 1,5v per cell,
as you know.
If this is a problem, I can make you a 10mA current limiting charger using
two NiCad batteries.
Best wishes,
Klas.
>
>It's actually what I consider the biggest flaw of these Telingas. It
>should have been designed to take the standard 9 volt battery. These are
>available not only in alkaline, but NIMH and nicad. I actually use a
>special 9 volt NIMH of standard shape to charge the Telinga, don't like
>using throw aways if I can help it. The standard NIMH and nicad
>rechargable 9 volt batteries are the same voltage as the custom battery
>and won't charge it at all well. However I found a company that makes a
>9 volt NIMH with the same voltage profile as the alkalines.
>
>It's a long ways to go for me to get another custom battery. So far mine
>is holding charge fine. I have flattened it a couple times as detailed
>above. It's very easy to do accidentally.
>
>Walt
>
>
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Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email:
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