Larry, CTCSS was from 60s with Motorola's "PL" or private line. Ham repeaters got started for the most part in late 60s and few used CTCSS. I'd say most really got into tone in 80s with so many repeaters and lots of other services started using radio for day to day comm.
Most Ham VHF/UHF rigs of the 80s had tone option, but now most have at least built in encode from factory with programmable with each memory...very flexible. Motorola used expensive reeds that vibrated at the designed tone when excited and gave more output. A seperate reed was needed for each tone. Some companies like Comm Spec used resonator for each tone. Now with chip technology a programmable tone decoder and encoder is easy. Comm Spec now uses a microprocessor counting the tone period to decode. This is nice for no matter what the tone they know what it is. Just married a dip switch to determine if wanted to give output for particlar tone. Of course then it was easy to marry memory with a number of tones to respond to making a community repeater. Nice design. 73, ron, n9ee/r >From: larry allen <[EMAIL PROTECTED]> >Date: 2007/08/26 Sun PM 12:40:39 CDT >To: [email protected] >Subject: [Repeater-Builder] subaudibe tones.. > >Does anyone know when subaudabe tones were introduced into ham radio >repeaters.. or more specifically when they became standard in ham radio >sets? >Larry ve3fxq > > Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
