[Hallicrafters] SX-42 S-meter

[DW Holtmnan]

Rich,

Use some basic ohms law and put a small voltage across it. First 
disconnect the terminals, then using a DC power supply if you have one 
(set at maybe 5 or 10 volts), if not a AA battery will work. Put a large 
pot in series (maybe a 1 MEG) and connect it. Slowly turn the pot until 
full scale indication is reached. Disconnect the pot and measure the 
resistance if it. It will tell you (again using Ohms law, I=E/R) if the 
full scale movement is correct and if it moves smoothly from resting to 
full scale. Caution, be sure the max resistance is in series before 
applying power, do not apply a voltage directly across a meter, it can 
peg it and burn it up quickly.

Best,
DW Holtman


Rich Soennichsen wrote:
> My SX-42's S-meter has never worked.  It will not adjust as per the
> manual but I do see slight movement when crossing a station.
> The meter's mechanical zeroing screw (front face) only zeros the
> needle on the high end of the scale, the right side.  This seems odd
> but perhaps this is correct.  Another possibility is that it is the
> meter's problem.
> Can an SX-42 owner verify the rest position of the needle when the 
> radio is off?
>
> Thanks
>
> Rich
>
> W7SOE
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