Well, there, that explains it as good as can be. I recall the days when our phone number started with PL3 (for 753 exchange) and the PL stood for PLeasant.
Chuck WB2EDV ----- Original Message ----- From: "William Becks" <wbe...@centurytel.net> To: <Repeater-Builder@yahoogroups.com> Sent: Wednesday, August 26, 2009 10:09 PM Subject: Re: [Repeater-Builder] IMTS Channel Designators > Folks, > > A reasonable explanation can be found at URL: > http://www.privateline.com/TelephoneHistory3A/mobile.html on how the Bell > System used the two-letter Channel Designators as a prefix to the original > MTS 5-digit mobile phone numbers. Later, when IMTS replaced the MTS > system, > Bell went to a seven digit dialing plan with the first three digits being > the NPA (Area Code) for the mobile telephone registry. > > Bill, WA8WG > > > ----- Original Message ----- > From: "Eric Lemmon" <wb6...@verizon.net> > To: <Repeater-Builder@yahoogroups.com> > Sent: Wednesday, August 26, 2009 8:31 PM > Subject: RE: [Repeater-Builder] IMTS Channel Designators > > >> Jesse, >> >> Actually, those are MTS channel designations; the IMTS came several years >> after MTS was deployed. The eleven "Y" and "J" channels were in the >> 152-158 >> MHz VHF band, while there were also ten "Z" channels in the 35-43 MHz Low >> band, and six "Q" channels in the 454-459 MHz UHF band. The low-band >> channels had an 8 MHz split, VHF channels had a 5.26 MHz split, and UHF >> channels had a 5 MHz split. The oddball VHF channels were later used for >> taxicabs. I am currently using two of those VHF channels in commercial >> repeater service, taking advantage of the small additional separation. >> >> Back in 1968, I put a two-channel GE Pacer (gasp!) with a Secode >> mechanical >> selector attached, in MTS service back in Rantoul, Illinois. Not too >> many >> folks in that part of Illinois had mobile telephones back then, and even >> fewer had a kluge like a Pacer. Despite its appearance, it worked quite >> well, and I learned to anticipate when the phone would ring by counting >> the >> clicks as the Secode unit stepped. >> >> I, too, would like to know the origin of the two-letter channel >> designators. >> >> 73, Eric Lemmon WB6FLY >> >> >> -----Original Message----- >> From: Repeater-Builder@yahoogroups.com >> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jesse Lloyd >> Sent: Wednesday, August 26, 2009 5:32 PM >> To: Repeater-Builder@yahoogroups.com >> Subject: [Repeater-Builder] IMTS Channel Designators >> >> >> >> Hey All, >> >> I was having a discussion with a fellow tech and the topic of IMTS came >> up. >> Does anyone here remember the reason for the strange channel designators? >> JL YL JP YP YJ YK JS YS YR JK KR ? Why YL... why not channel B or Ch 2, >> they >> must mean something... >> >> >> Jesse >> >> >> >> ------------------------------------ >> >> >> >> Yahoo! Groups Links >> >> >> > > > > ------------------------------------ > > > > Yahoo! Groups Links > > >
