[Amps] Amps Digest, Vol 105, Issue 4
dave at uk-ar.co.uk
Thu Sep 8 02:25:55 PDT 2011
At a guess, all the "action" will be compressed into the first 30% of
Any error, will I think depend on the difference in coil resistance of
the meters, as presented to the slug.
You could "process" the DC signal with an opamp or two, to make the slug
"think it's seeing" a 30uA meter, while amplifying the signal to drive a
100uA (or other) meter to full scale. But, you'll need to re-scale the
meter of course..
Look up "Meter Basic" http://www.tonnesoftware.com/meter2.html if you
ever need to do that.
Actually, I think it's the paid "Meter" program you need (same link) as
a non linear scale is needed AFIK for simple things like Bird slug based
power meters.. Or linearise the slug power/DC curve with the
electronics to drive the meter.
Unless anyone knows of another tool that can be use.
> -----Original Message-----
> From: vk3pa at vk3pa.com
> Subject: [Amps] bird meters
> To: amps at contesting.com
> I have a couple of BIRD 100ua meters 2150-090 es 091 if I use
> these on my thruline 4522-002-8 50 ohm with 43 slugs wot
> error will I see?? as these slugs are for 30ua..meters!!
> or can I recal the slugs es if so "how"
> tu 73 vk3pa
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