[GreenKeys] Audio to TTY - Current Loop?

[Cory Heisterkamp]

Good News! Thanks to Wayne I now have the correct gearset for the 32.
Also got Eric's board- looks great.

Next step is a suitable loop supply. My 32 was a Telex machine and
some sources I've read indicate they're expecting a 60mA loop.
However, I've also seen 20mA referenced. Heeding Larry's advice below,
I'd also not like to fry my input transistor. Can anyone in the club
comment on a proper supply voltage/current?

Thanks,
Cory

On 9/7/12, Larry Tighe <larryradio at att.net> wrote:
> I changed my 32's to 60 WPM with new gears....to the best of my knowledge,
> they've become unobtainium....
>
> Also, if you run more that about 20 volts and 20 ma. into the Telex it'll
> fry the input transistor....be careful.  I'm told the range finder can be
> "adjusted" to make the machine see 60 WPM data.
>
> lar
> K2JIA