Bob, I remember it well. I knew some guys in Buffalo NY back in the day who had converted IMTS rigs (pre-cellular mobile phones) with full-sized 2M duplexers in their trunks!
In Buffalo, the first big repeater group was BARRA, led by W2EUP, Gil Boelke (sp?) and some fellow repeater enthusiasts who splintered off from the local old-fogey HF club in the late 1960s. (Gil also started a company called GLB Electronics, which manufactured early, aftermarket synthesizers for rockbound 2M radios.) BARRA had an autopatch before there was touch-tone. Users fed a 400 Hz steady tone fed through a rotary dial, and the number was pulse-dialed at the repeater site by a relay. One of my elmers had an Olds 98, and had replaced the large, round clock on the dash with a nicely machined backing plate that matched the look of the speedometer to its left. He used the blank plate to mount an actual Western Electric rotary dial. I still remember the double-takes when passers-by saw his dashboard. Thanks for bringing those memories back! 73, Paul AE4KR ----- Original Message ----- From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, November 08, 2007 7:58 PM Subject: Re: [Repeater-Builder] "Full Duplex" At 11/8/2007 18:13, you wrote: >At 06:02 PM 11/8/2007, you wrote: > >> >> >> >>In practice, this would drive licensees and control ops nuts, because the >>mobile station's audio would not appear on the repeater output, and >>anyone monitoring the repeater would only hear the landline party, >>without the mobile station's side of the call. > ><---Not true. At one time in ham repeater history, running full IN-BAND >duplex was fairly common (how I remember my days with a modified Western >Telephone "Princess" phone attached to my full-duplexed Motrac!). A full >duplex AP was quite nice to use! > >To this day, I frequently run in-band full duplex. Just sort of an old >habit :-) I assume your repeater doesn't have ADMs. Bob NO6B
