R2 doesn't like low voltage?

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From: John Seboldt (rohrwerk@netcom.com)
Date: Sat Jun 24 1995 - 23:08:53 EDT


Trying to run a bit of battery-powered Field Day from home, I was
reminded of a problem I've had with my R2 receiver: the audio drops out
very suddenly below about 11.9 volts. And I mean abruptly right at that
voltage! This obviously creates problems for battery operation.

With my scope, I traced the problem to the LM387 audio preamp stage. The
stages before this were still working below 11.9 volts.

Anything one can do to re-bias that stage or something? Or do I have a
marginal chip?

[ John Seboldt rohrwerk@netcom.com / Aaaaaahhh....
] Amateur radio K0JD... / BAAAAACH!
[ Church of the Annunciation, / (Radar O'Reilly)
] Minneapolis /


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