[GreenKeys] Tuning fork looking for a home

[Jerry Murphy]

Teletype Model 28 motors turning at 3600 RPM use the 120 CPS forks.
The 87.6 fork can also be used but it is a slightly more involved
process.

Jerry Murphy


-----Original Message-----
>From: "John, W9DDD" <w9ddd at tapr.org>
>Sent: Nov 24, 2019 9:49 AM
>To: Green Keys <greenkeys at mailman.qth.net>
>Subject: [GreenKeys] Tuning fork looking for a home
>
>What uses a 120 CPS tuning fork?  I've heard of 180 and 87.5ish.
>
>-- 
>John, W9DDD