Heathkit EK-1

[Gordon Brandly]

1000 ohms is correct. That's the meter's resistance as stated in several
places in my EK-1 manual. I suspect they did that to make calculations
easier for the student (no calculators in those days!).

I scanned a few pages from my manual (schematic, assembly pictorial, etc.)
for another fellow, and I'd be happy to e-mail them to you if that would
help.

Gordon Brandly


> -----Original Message-----
> From: Heathkit Owners and Collectors List
> [mailto:HEATH at LISTSERV.TEMPE.GOV]On Behalf Of Jack Crenshaw
> Sent: December 16, 2000 11:41 AM
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: Heathkit EK-1
>
>
> 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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