I’ve got a spare 74505/74151 gear set, not new but in good shape.

Offers considered, pictures available upon request.

Best,

Joe

On Fri, Jun 23, 2023 at 5:31 PM John, W9DDD <w9ddd@tapr.org> wrote:

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)

---
----
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:

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@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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