[GreenKeys] ROTR local loop?

[Russ Miller]

Yes, I can be receiving traffic on the LP, cutting a tape on the
under-the-dome LPR (from the incoming traffic) and making a paper tape
off-line while typing blind.



On Thu, Nov 24, 2022 at 9:07 PM W2HX <w2hx at w2hx.com> wrote:

> Ok Russ. So you have two tape punching assemblies in your ASR? I only have
> one. It sits over the keyboard code bars for T and KT modes. It also has
> selector magnets and can be added into the loop to print the traffic.
>
>
>
>
>
> 73 Eugene W2HX
> Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos
>
>
>
> *From:* Russ Miller <wa3frp at gmail.com>
> *Sent:* Thursday, November 24, 2022 9:03 PM
> *To:* W2HX <w2hx at w2hx.com>
> *Cc:* Greenkeys <greenkeys at mailman.qth.net>
> *Subject:* Re: [GreenKeys] ROTR local loop?
>
>
>
> Eugene,
>
>
>
> Maybe,  I've confused the separate under-the-dome LPR with the Typing
> Perforator that sits next to the keyboard.
>
>
>
> Here, the local loop for my Telex machine is always on as Telex was an
> unattended service.
>
>
>
> Hope that helps!
>
>
>
> 73
>
> Russ
>
>
>
>
>
> On Thu, Nov 24, 2022 at 7:53 PM W2HX <w2hx at w2hx.com> wrote:
>
> Hey Russ (and everyone) happy thanksgiving. I had a question for you.  You
> mentioned that the LPR receives traffic (over the line) in KT or T modes.
> Doesn’t that prevent you from punching tape while you continue to print the
> traffic? I’ve always heard about reading the traffic and simultaneously
> preparing a response on tape.
>
>
>
> My set up is a little different but gives a similar result. I have a
> separate switch mounted below the TD that changes which loop the LPR is
> connected to. With the switch “off” it is on its own local loop, runs
> “closed” and keeps silent. With the switch set to “on” it puts the LPR in
> series with the main loop and begins punching the incoming traffic.  The
> only problem I have with this (and this problem has been unsolved for 15
> years) is when I stop printing from the loop and select KT or T some bits
> are often stuck. The main knob is supposed to reset all of the code bars
> but doesn’t. Never been solved all these years. Quite a mystery. I am sure
> I am missing some kind of piece of mechanical wizardry but never figured it
> out.
>
>
>
> Another question for you, Russ. I’m wondering if your LPR also punches 3
> or 4 holes when you turn off your ASR? Mine does because when the power is
> shut down, the motor begins spinning down but the loop is immediately shut
> off. So for a few revolutions of the LPR motor, the LPR runs “open” and 3
> or 4 positions advance. Does yours do the same?
>
>
>
>
>
> 73 Eugene W2HX
> Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos
>
>
>
> *From:* Russ Miller <wa3frp at gmail.com>
> *Sent:* Wednesday, November 23, 2022 7:45 PM
> *To:* W2HX <w2hx at w2hx.com>
> *Cc:* Greenkeys <greenkeys at mailman.qth.net>
> *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 <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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