[GreenKeys] Model 19 and 15 on 20mA loop?

[drlegendre .]

There's that, and the fact that two coils in parallel at 60mA would need
30mA in series (at 2X the voltage drop) . That's 50% higher than the 20mA
standard, and a whole lot more fudge-factor than would generally be
considered acceptable.

On Tue, Apr 12, 2016 at 6:17 PM, WA5CAB--- via GreenKeys <
greenkeys at mailman.qth.net> wrote:

> No.  The selector magnets in the pulling selector are already wired in
> series.  I was pretty sure that this was the case but I dug out the first
> Teletype manual I ever owned (nust have been in early 1968 as I had written
> my two call signs and "ETN" on the front cover) and waaaaay back in the
> back found the schematic diagram.
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
>
> In a message dated 04/12/2016 11:02:50 AM Central Daylight Time,
> magwheels at comcast.net writes:
>
> I see here that if you have the holding type selectors the change is easy
> to make from 60mA to 20mA.
>
> But could the pulling type magnets also be used at 20mA loop current?
>
> 73
>
> Andy
>
>
>
>
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