----: Re: [Amps] Bird PEP board
Hi Roger
I have a Peak reading circuit for a Bird using an op amp
with a battery. To solve the battery drain I used a DPDT
switch and when I'm in "average" position the battery is
out of the circuit.
73 Rich KL7RA
> The mystery of the "Battery Eating Bird" has been solved! I drew
>out the circuit and found that each battery has a Zener shunt
>regulator circuit associated with it. A 6.2 volt Zener through
>a 150 ohm resistor! The damn regulator gobbles up about 18 ma
>to regulate 2ma for the IC! The engineer that designed this must
>have worked for Eveready.
> I'm wondering if this circuit really has to be regulated at all.
>If so, perhaps a low dropout series regulator would be much more
>efficient.
>
>73, Roger
>
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