Heath HV supply

[Charles W. Morehouse]

Hi Terry,
Have an IP-17 so made some checks. On C- the voltmeter maxes out at 125v.
Measured the output with a VTVM and the meter is accurate. Output is the same with meter
on or off. The meter is after the 22k resistor as shown on the schematic. Look at the
meter switch and you will see that the 150k resistor stays as a load no matter what the
switch position. So there is an 172k load across the pot at all times. The meter would
never go to 150v unless the switch were faulty. I don't see a problem. Hopes this helps.
Luck and 73's.
wayne;
W4GBW

Terry Perdue wrote:

> Regarding my recent post about the IP-32 - the newer supply was the IP-17,
> and I found a catalog that included the schematic. It has the same 22K
> resistor in series with the bias line. So if the bias control is turned all
> the way up, the output will be 150V with the meter switch in the 0-400V
> position, and drop to 130V in the 0-150V position. If that's really the way
> it's wired, the meter would never go above 130V when displaying the bias
> voltage. Seems to me I saw it go to 150 before I rebuilt it, which would
> mean the meter was connected ahead of the 22K to show open-circuit voltage.
> Can someone tell me if that's how it's really wired, or whether the manual
> covers this somehow? Thanks.
>
> Terry
>
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