[GreenKeys] 18 volt Internal Loop Supply

[Tom Hunter]

The internal loop supply on my 32 is 18 volts.

That is possible because it uses a transistor driver for the selector
magnet.

That is why the 32 is polarity sensitive.

I believe the selector magnet is actually driven with 1/2 amp at -20 volts.
So it would be relatively few turns and low inductance.

I suspect all the same is true for a 33.


Tom   N3CRK
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