[GreenKeys] Current limiting

[Michael O'Day]

Randy said in his explanation:

"As noted above even with teletypes "designed" for low
voltage keying - a certain "RiceGuy" has been known to
replace the low voltage coils in his 35 and run it on
a traditional loop (URA-8, etc.). Obviously - there is
"wiggle room" here - particularly with the later
machines where things weren't pushing the limits quite
as hard as say the 15."
Does that mean the 15 requires a higher voltage that
the 33? I recently aquired a 15, do I need to build a
HV (120+) supply for it, or can I run it on one of
those Black Box RS232/Current Loop adaptors?

Mike - N9ODM

--- Larry Tighe <larryradio at worldnet.att.net> wrote:

> Hmmm, upon more thought, I think the cap would
> defeat the current limiting 
> of the 2K.
> 
> lar
> 
> 
> 
> > Randy,
> >
> > Re: the 130 VDC and the voltage while "under load"
> i.e. passing thru the
> > magnets...current flowing.
> >
> > Would it be a good idea to have a large cap across
> the 130 VDC supply 
> > output
> > to hold up the voltage during the keying of the
> magnet?  I would guess a
> > "solid" 130 would be better for keying than the
> voltage excursions on the
> > output side of the 2 Kohm resistor.
> >
> > lar
> 
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