[GreenKeys] Loop supply options

[Steve Garrison]

I would guess it kind of along the same lines as which way does the current
flow.   In the SPACE condition the loop is open and there is nothing across
the magnet, no current to measure and no voltage present.  Like turning the
circuit breaker off that controls your wall out. No voltage present so you
shouldn't find out with a shock that you forgot to turn the breaker off.

But I do get your point, almost all of the voltage is dropped at the big
resistors but the current is the same through out the loop.

Steve G./N4TTY

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
On Behalf Of Jim Cooper
Sent: Monday, September 9, 2019 12:45 PM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Loop supply options

On 9 Sep 2019 at 10:52, Jeffrey Angus wrote:

> At the point the loop is placed in the Mark condition, the full 
> voltage of the loop supply is placed across the selector magnets.

did you mean to say SPACE condition?

in mark condition, current is flowing and there will be a big voltage drop
across the 
limit resistor and only the   
I squared * R(of selector magnet coil) voltage will  be across the selector
magnet. 

on space condition (open circuit) there will be no voltage drop across the
limit resistor, and so the full p/s voltage will be across the circuit. 


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