Heathkit EK-1

Jack Crenshaw jcrens at EARTHLINK.NET
Sat Dec 16 13:41:27 EST 2000


Awhile back, I mentioned to this group the EK-1, which I had never heard
of.  I recently got one through eBay, but it doesn't work.

Here's the problem:  The milliammeter meter works, i.e., is sensitive to
inputs, but all scales read about a factor of four too low.  After
checking all the resistors, I finally narrowed things down to the meter
movement itself.  It simply doesn't respond as it should.  I measured
(VERY CAREFULLY, I might add) the resistance of the meter, right across
its terminals.  It's about 1k.

How the heck can a galvanometer movement have a resistance of 1k?  Do
you suppose there's a series resistor down inside the meter itself?

Anybody got any ideas?

Jack

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