[GreenKeys] Magnet Spice Model

[Bob Camp]

Hi,

So here's the next question.  What's the inductance of the selector 
magnets on a model 28? I seem to remember some fairly vague "a couple 
hundred mili henries" descriptions but nothing more accurate. I'm not 
sure if that even applies to a model 28 at all.

I'm still playing with magnet driver circuits. The inductance of the 
magnets along with their Q has a pretty big influence on how a given 
circuit will (or won't) work. It looks like if you know the inductance 
the voltage spike on turn off will give you a pretty good idea of the Q 
(weird but true ...). A couple of neon bulbs across the magnets will 
light up on turn off. Pretty quick way to get an estimate of the 
voltage.

The final question is weather two dollars is to much for a keyer 
circuit .... maybe needs to be under a buck ...

	Take Care!

		Bob Camp
		KB8TQ