Ed Heimbach wrote:
> Want to meter HV out. Power supply variable from 0 through 4.5 kv dc
> Have 1 through 5 v DC movement.
> I built dropping resistor string to multiply meter by 1000X.
> Meter now has a non-linear response.
> I.E., 1 volt position corresponds to 1000 volts, 3.25 volt on meter scale
> equals 4.5kv.
> It would be nice if my max. volts (4.5 k) corresponded with the 4.5 mark on
> the scale card.
> Easy way out would be to jiggle resistor values to get mid point on scale
> (2.5 volts) to correspond with 2.5 kv, and then make new meter scale to agree
> with indicating needle.
> Any better solutions?
Put a 1 or 2 k Ohm resistor at the bottom of the bleeder string then put a 1
mA meter across it,
re-calibrate the meter card for k Volts.
--
Ron KA4INM - WARNING TO ALL PERSONNEL:
Firings will continue until morale improves.
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