[Heathkit] SB-220 Multi-Meter

[Jim Brannigan]

Did you try Harbach electronics?

Jim


> Hello to All,
>
> I am still looking for a Multi-Meter for an SB-220. Someone out there must
have one. I have tried to look up the original manufacturer, Ideal Precision
Meter Co on the web with no success. Does anyone have their URL ?
>
> FYI, the meters in the SWR meters ARE NOT the same as the Multi-Meter in
the SB-220. When measuring the voltage drop across a resistor, the SWR meter
reads much higher than the Plate Current meter in the SB-220. Both the Plate
Current and the Multi-Meter have the same manufacture part number on them,
so I am assuming that they are electrically the same. Also, the Multi-Meter
in the SB-220 is a lighted meter, the meter in the SWR bridge are not. The
meter in the SWR bridge has a different magnet structure that blocks the
light to the face.
>
> I have put a resistor across the SWR bridge meter movement to make it the
same calibration as the Plate Current meter. Once I get the metering
circuits re-built, I will see if it works OK on all three. I will let the
list know how I make out with this project.
>
> 73 de Fred, W1SKU