[GreenKeys] Motor gear questions

[John, W9DDD]

For a governed motor that runs at 2102 RPM (usually just listed as 2100 
RPM)   If someone had a junker TG7 they might have be able to get the 
gear.  I don't know how many people might have converted their TG7 to a 
synchronous motor (1800 RPM) and then threw the old gears in their junk 
box? (TG7 = military M15)

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You said "tomorrow" yesterday.

The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

On 6/23/2023 4:38 PM, Jeff G wrote:
> 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 
> <mailto: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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