Actually it was developed for the military in the 1940's if you do a
search on Motorola and Fred Link gear for the military I think you will
find the first lists of PL or CTCSS tones used-I use to have the
references but have long since purged them from my system-PTT was
invented in the 1930's, is anything really new?

 

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Morris
WA6ILQ
Sent: Thursday, September 17, 2009 6:09 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Anybody have some REALLY old Moto manuals?

 

  

If so, I need a favor.

The first implementation of PL used about 20 tones.
The 32-tone "standard" list didn't come until later.

Does anybody have a copy of that early tone list?
It would have been somewhere in the 1950-1955 time frame.

Thanks in advance.

Mike WA6ILQ



Reply via email to