But it was not programmable (which John specified). My TR-7400 (introduced in 1976) has a tone squelch option (again not programmable).
I'm sure CTCSS 'first use' in the ham world dates back into the 60s. Joe M. Chuck Kelsey wrote: > > The 2AT (series) before the 02AT had encode as an option. > > Chuck > WB2EDV > > ----- Original Message ----- > From: "JOHN MACKEY" <[EMAIL PROTECTED]> > To: <Repeater-Builder@yahoogroups.com> > Sent: Monday, August 27, 2007 1:27 PM > Subject: Re: [Repeater-Builder] Re: subaudibe tones.. > > > The Icom 02AT was either the first, or nearly the first, to offer built in > > programmable CTCSS. > > > > ------ Original Message ------ > > Received: Mon, 27 Aug 2007 11:16:29 AM CDT > > From: "Mark" <[EMAIL PROTECTED]> > > To: Repeater-Builder@yahoogroups.com > > Subject: [Repeater-Builder] Re: subaudibe tones.. > > > >> I do remember that the Icom 02AT had subaudiable tone as an encode > >> (TX) function over 20 years ago. As to the repeaters, it has and > >> continues to be an owner option in most areas of the US. I don't > >> there is a real date as to when it was introduced in repeaters. > >> > >> Mark KS4VT > >> > >> --- In Repeater-Builder@yahoogroups.com, "larry allen" <[EMAIL PROTECTED]> > >> wrote: > >> > > >> > 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 > >> > > >> > >> > >> > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > Yahoo! Groups Links > > >
