Ooh me me. That’s indeed used in the receiving transmitter-distributor with the oddball distributor segments. That TD is used for the one-time tape cypher system. I have one of those and would be happy to give your poor little oddball a good home. Ya never know when a massive EMP will take out all this modern stuff and we’ll need to go back to encrypted paper tape…….

The chart I have shows 104580 as the 30 tooth gear and 104579 as the 7 tooth pinion. I dunno what’s up with that.

Nick England K4NYW
www.navy-radio.com

On Mon, Feb 19, 2024 at 2:17 PM John, W9DDD <w9ddd@tapr.org> wrote:

I am the proud owner of a 104580LS 7 tooth pinion.

Looking at the chart on page 21 of bullet 1095B, I find it's for 70
WPM/420 OPM. That seems to be a part of an ED rather than XD, in other
words a receiving distributor. (a guess on my part knowing that RX
shaves in 15 or 28 printers turn at that speed)

How would this differ from the 74912-7T used on the 15 printer?

I suspect that few if any EDs still exist, so I suspect this is a
candidate for recycling.

Anyone know the significance of the LS as a suffix of that part number?

-----

----
The above comments or recommendations are SWAG. Use at your own risk.

John, W9DDD

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