Ham-II Rotor Anomaly

[Wayne Alexander]

If you find the pot is the problem.
After disconnecting wires 3 and 7 from the control box, connect them 
together and connect the ohm meter from here to ground.  
If the pot is open on north and the wiper is contacting either half
the meter will peak at north and drop off going east or west.
Better than nothing until you can fix it.

Most likely here in the east it will be open on north east.  If so,
as you're rotating from west to east the resistance will rise to
about 315 or so and when going past the break it will jump down to
about 185 and continue going down as you rotate more to the south.

Wayne, VE9ST

On Sat, 8 Feb 
1997, T. A. Russell wrote:

> Disconnect the wires at terminals 3 and 7 from the control box and
> measure
> the resistance between them. It should read 500 ohms. ( If it is open,
> there is
> a break in the potentiometer or the control cable.)
> 
> You can use an ohmmeter to determine position by measuring the resistance
> 
> between either wire and ground which is a good trick if one side is open.
> 
> This trick can be used on all HAM series rotors.
> 
> de Tom - N4KG
> 
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