[GreenKeys] Model 19 gears

[Jerry Murphy]

You mention that the motor pinion has a number stamped on it of 74919LS.
Teletype Bulletin 1114 shows the 74919 pinion (7T) and the 74920 gear (46T)
being used with a 60 Hz sync. motor for 40 WPM service.  This seems to be
an unlikely setup.  

Here's the link to the manual on Nick England's website:
             http://navy-radio.com/manuals/tty/1114B-4309.pdf

The gear chart is on page 39.

Jerry Murphy


-----Original Message-----
>From: "Kevin H. Phillips" <kh-phillips at 9-5usa.org>
>Sent: Jul 24, 2018 3:16 PM
>To: greenkeys at mailman.qth.net
>Subject: [GreenKeys] Model 19 gears
>
>I have a Western Union Model 19 set that has been sitting around for 3-4 
>years and I finally had some time to tinker with it.  The table is a 
>model 7904-A.  It looks similar to this item on eBay except it has no 
>reperforator or call unit and is in *much* better condition:  
>https://tinyurl.com/y82xlg9r  (Item No. 323223096071).
>
>
>My main question right now is does someone have a list of the various 
>gears available?  The parts manual I have that is supposed to have a 
>gear chart is missing that one page (naturally).
>
>
>The pinion gear on the motor appears to be #74919LS.  I can't see the 
>numbers on the gear on the main shaft.  I've tried copying ITTY with it 
>but it just types gibberish mostly so I'm guessing this was either a 
>Telex machine (like the one on eBay) or it was set up for some other 
>speed than 60wpm.  It also seems to have been set for receive only 
>because I can't get keyboard functions to work.
>
>
>If this machine was used in Telex operation, then I guess the next 
>question would be if it could be used with i-Telex like it is?
>
>
>Thanks,
>
>Kevin
>
>W5TTY