Message number 3 ...
Mike Morris WA6ILQ wrote:
>
> At 09:11 PM 1/7/05, you wrote:
>
> > > >__________________________________________________________
> > > >"He was Mr. Repeater"
> > > >
> > > >He sure was!
> > > >
> > > >K6MVH, Ken W. Sessions Jr. was editor of FM magazine and wrote
> > > >the books: "Radio Amateur's F-M Repeater Handbook" and "The
> > > >2-Meter FM Repeater Circuits Handbook"
> > >
> > > The Repeater Handbook was the blue cover hardback printed by
> > > Editors And Engineers, the Circuits Handbook was all the material
> > > that was left over and was returned to Ken. When he went to work
> > > for Wayne Green he took it along, and turned it into a book that
> > > Wayne printed.
> > >
> > > Ken also wrote "The 2 Meter FM Handbook" that was published
> > > by TAB books.
> > >
> > > I have copies of all of them.
> >
> >
> >Yup I still have my "Repeater Handbook".
> >
> >Somewhat intriguing is an illustration in the Handbook of an
> >*on-frequency* repeater. Was one of these ever built and used in
> >practical form?
> >
> >Laryn K8TVZ
>
> For those that never saw the book there was a few
> paragraphs on an interesting concept.... an
> "on-frequency" repeater. Picture a regular duplex
> repeater with the RX and the TX on the same channel!
>
> As the story I heard goes...
> This device took advantage of a geographic anomaly
> on Johnstone Peak - the lower site had the TX and the
> upper site was behind a small ridgeline and couldn't
> hear it.
>
> The old W6NO repeater (pre 600khz days) listened
> on 146.820 and transmitted on 146.70mhz, long
> before RTTY took over 146.70...
>
> Then the great conference took place, and all the Los
> Angeles area repeaters moved to 600khz over a
> month-long period. Neil WA6KLA can tell you about
> that, as he was there.
Oh yes ... <g>
> The 82-70 W6FNO box was given the 146.22-82 pair,
> (the group had started out as an ARES team on 146.82
> simplex, and there were a LOT of 82 simplex rocks
> around... with that pair at least the RX rocks would
> be useful...).
>
> They converted the TX at the lower site to 146.82 and
> hooked it up to the wireline coming down from the RX
> site where the 2m RX, the 440 repeater and combination
> control system was... they were going to convert the lower
> site, then the upper site. They expected an instant lockup
> once the repeater was turned back on, but it didn't. It took
> a few minutes to figure out why - they knew that the isolation
> between the two sites was good, but never expected the
> geography to provide isolation that was THAT good...)
>
> For a while they experimented with the on-freq
> repeater, even tried it with the autopatch, but ended up
> converting the RX to 146.22 and having a conventional
> carrier-squelch repeater.
>
> The concept is valid, has been proven, and would work
> on any set of frequencies and at any location where you
> have split sites with adequate isolation between the two
> sites.
>
> BTW the W6FNO repeater has been in continuous
> operation since at least 1967, possibly earlier...
> It was first on 82-70, then on 22-82. It was WR6ACD
> for a while, but it's the same group. Nowadays it's a
> voting and simulcast system with 22-82 at both
> Johnstone Peak (about 3000 feet) and at Onyx Peak
> (at about 8,000 feet) over 60 miles away.
>
> Anybody know of a repeater with a longer history?
>
> Mike WA6ILQ
I also have a story or two about the 146.82 MHz repeater that Mike
describes above ... that will be another time.
Neil
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