[GreenKeys] How many ohms is model 15 selector magnet?

[Zachary Zarzycki]

According to https://www.aetherltd.com/refurbishing15.html

The selector magnet contains two coils, with a 90 ohm resistance each. They
are usually wired in parallel, and the measured resistance at the telephone
plug to the typing unit was 55 ohms, as expected. Applying 4V or so to the
selector magnet will pull in the magnet, and this is a good basic test.
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