[GreenKeys] desktop LPR local loop?

[Russ Miller]

Hi Eugene,

I have a Teletype Model 28 ASR on the u-Telex network that operates in a way that is similar to what you are looking to do.

In my machine, the Line Printer (LP) and LPR have their own selector magnet driver (SMD) cards.

The K-KT-T switch either keeps the loop to the LPR in mark hold (in K) or let’s the LPR receive traffic (in KT or T)

Works like a charm when you want to save an incoming message to paper tape.

Russ WA3FRP 
I-Telex 834-328 WUTMPAM CHIL


Sent from my iPhone

> On Nov 23, 2022, at 6:01 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
>  
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
> 
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to wa3frp at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20221123/f1d6ae41/attachment.html>