[GreenKeys] TTY loop jack boxes - SET, LPG, MISC

[Paul Birkel]

Nick:  So I read the action of LOOP backwards :-<.  I found that schematic in http://www.navy-radio.com/tty/ttypatch-usa-01.pdf as Figure 17.  It’s labeled there as: TYPICAL BLACK SEND AND RECEIVE DETAIL "G"  Maybe the division of the patch panel into “left” and “right” parts, which I don’t understand, explains it … somehow?

 

From: Nick England [mailto:navy.radio at gmail.com] 
Sent: Monday, August 16, 2021 7:30 AM
To: Paul Birkel
Cc: Greenkeys
Subject: Re: TTY loop jack boxes - SET, LPG, MISC

 

In your new diagram, if you plug into LOOP it will short the EQUIP lines together. I don’t know the intended purpose of LOOP. There’s no reason to ever plug a dummy plug into SET unless you just want it to run open. 

 

In the SB-1210, the second SET jack acts just like the first. The associated equipment is either in the loop or patched to another loop. You might have a printer on SET1 and reperf on SET2 if you usually wanted a tape copy as well as printed copy. 

 

On Mon, Aug 16, 2021 at 5:03 AM Paul Birkel <pbirkel at gmail.com> wrote:

OK.  More grist, thank you :->.  I found the following diagram in another document last night.  It just seems weird to me.  Can you explain?



-- 

Nick England K4NYW
www.navy-radio.com

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