This is true,
Neil McKie - WA6KLA Fred Seamans wrote: > > To Jim & et all: > Actually there is a reason that Motorola and GE (now M/A-COM ) used a > reverse CTCSS tone burst. The Hi-Q solid state tone detectors that are used > by these manufactures have a ring down time delay, the same as trying to > stop a mechanical reed after removal of the driving tone. The design of the > solid state detector dictates the amount of phase shift of the CTCSS tone > that is ideal to stop the ring down of the Hi-Q networks. Both Motorola and > GE used the amount of phase delay that worked best with their design. It was > not to make other brands function poorly. > Fred > W5VAY > ----- Original Message ----- > From: "Jim B." <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, October 29, 2004 1:45 PM > Subject: Re: [Repeater-Builder] TKR-740 versus TKR-750 (Was: Maggiore's > Service) > > > > > Eric Lemmon wrote: > > > > > Unfortunately, the TKR-740 receiver cannot properly respond to > > > a Motorola reverse burst, but that is a deficiency that I can live > > > with. (Geez, I wish Ham radios could encode and decode reverse burst!) > > > > > > > That's actually Motorola's fault. I think they and M/A-Com are the only > > ones who use other than a 180 phase shift for revese burst, and they do > > it deliberately to make other brands not sound as good on their systems. > > -- > > Jim Barbour > > WD8CHL > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
