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 >
