[GreenKeys] Rare gear?

[Nick England]

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 at 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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