Thanks Russ. Yes my ASR functions in this way too, you just did a much better job of explaining it! I am going to pursue a similar idea for the ROTR (thanks, Nick, I knew that was the name but forgot).
From: Russ Miller <[email protected]>
Sent: Wednesday, November 23, 2022 7:45 PM
To: W2HX <[email protected]>
Cc: Greenkeys <[email protected]>
Subject: Re: [GreenKeys] desktop LPR local loop?
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 <[email protected]> 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:[email protected]
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 [email protected]