[GreenKeys] Motor gear questions

[Jeff G]

Found it here, page 47:
https://www.navy-radio.com/manuals/tty/1114B-4309.pdf

They are 60wpm (45.5 baud) gears for a specific motor. Hopefully that page
helps you out.

Jeff kc3gjx

On Fri, Jun 23, 2023 at 4:24 PM John Nagle <nagle at animats.com> wrote:

> This is for Dave Rabinowitz, who is trying to get a Model 15 going.
> He's having motor gearset problems, with a broken gear.
>
> His machine has these gears.
>
> 74505 PINION (7 teeth) on the motor shaft, which meshes with
> 74151 GEAR (35 teeth) [the broken one]
>
> That matches this Teletype manual:
>
>
> http://aetherltd.com/public/model15manuals/1110B_Model15_Parts_Dec43_ArmyVer.pdf
>
> That's an Army manual. Not sure what speed those gears are for.
> They only list one option, so that was apparently the Army
> standard.
>
> Here's a list, from a ham sales company, in 1971, that
> has all the gears:
>
> https://www.navy-radio.com/manuals/tty/W2DLT-1971.pdf
>
> That shows the 74912/74913 pair for 60-speed machines,
> which is what I've read elsewhere.
> Nothing in that table matches the Army manual.
>
> So, 1) does anybody know what speed the 75505/74151 pair
> runs at, and what's the situation on getting replacement
> gear pairs?
>
>                         John Nagle
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