[GreenKeys] desktop LPR local loop?

[Nick England]

The desktop unit was generally referred to as a ROTR - read-only typing
reperforator.

Usually it would have been connected to a patch panel so you could plug it
into a null loop or some active loop.

For your purpose, I don’t see why a 60ma loop at any voltage wouldn’t work.
You don’t care about switching times, just putting it on hold.

My drei pfennigs worth
Nick

On Wed, Nov 23, 2022 at 6:00 PM W2HX <w2hx at w2hx.com> wrote:

> Hi all,
>
>
>
> I am doing more in the shack these days and putting more time into my
> teletype set up. I have an M28KSR and M28ASR and one desktop printing
> reperf (LPR ?). I find it would be convenient to be able to put the LPR
> into mark-hold mode while the other machines type away. But to do that, I
> would need a separate loop supply and switch the LPR between the main loop
> and a mark-hold loop. My ASR has something like this. The internal LPR can
> be driven either by the keyboard or the loop. I have a switch under the TD
> that allows me to turn the internal LPR on or off. When turned off, it
> doesn’t run open because there is a loop supply. The ASR has a LESU of some
> kind in the cabinet that makes this all happen, IIRC.
>
>
>
> The question is, am I the only one who thinks a local loop for the desktop
> LPR would be a useful thing? Did they ever make such a beast? And finally,
> I assume since it is just mark hold, I could cobble up something simple to
> provide 60mA where the voltage would not be that critical?
>
>
>
> Any thoughts or suggestions?
>
>
>
>
>
> 73 Eugene W2HX
> Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos
>
>
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-- 
Nick England K4NYW
www.navy-radio.com
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