Linking to a repeater, ESPECIALLY with a SIMPLEX link is begging for trouble. While your "Link" is transmitting no one can access or control the "RPTR". Linking on the input to anything is just wrong....

So whats the answer?

FULL DUPLEX linking from your node to the site on 420Mhz or 927Mhz. Accomplished VERY easy with a pair of Motorola Maxtracs/GE-MVP/ETC....

You can put both on 927Mhz and use a Fiplex duplexer (the size of your fist).All of this sits on a rack shelf very easy. Simply wire in the RCVR at the site so it looks like another RCVR, the Transmitter as a AUX transmitter, in parallel with the existing downlink TX. Now when your link comes up, it keys the repeater but doesnt render the input useless.Add some simple logic (if your controller doesnt have it already) to disable the link.USE DPL ON THE LINKS! You wont hear it and crap that could hit the RCVR at the site when your end is off the air wont bring up the repeater.

OK..you got the basics.Use the Allstar telemetry so you can figure out where the traffic is coming in.Try to NOT use radios like Alinco,Yaesu,Kenwood,Icom as they have crap for a front end and they don't do well in extended keydowns. The Motorola and GE stuff is so much better for that kind of duty.....

Kirk

On Mon, May 28, 2012 at 10:00 AM, Bryan D. Boyle <bdboyle@bdboyle.com> wrote:

A local repeater club to me has a site which is inaccessible via the
internet (too far from the CO in route distance for DSL, and fiber
bypassed them...and the cable company wants someone's first born to run
a coax up the hill...) but, would still like, on an occasional basis, to
join my machines to their net for emcomm practice (I drop off the
network I'm usually on due to various reasons when the nets start up
there...).

So, I'm thinking that a simplex node on my current configuration, with
the proper split frequency, might be an/the answer. IOW, it's listening
on their transmit, I transmit back to them on their receive. Simple,
standard arrangement. FWIW, it's an alinco DR135, so I can derive the
COR and PTT nicely from the rear connector, so that shouldn't be a
problem.

So...thinking about how to build the configuration? Not really clear
what the values I should have in usbradio.conf or rpt.conf to enable this.

Of course, I'll script the connection/disconnection to sequence dropping
off the big net first, joining the simplex to the remote repeater, and
reverse, but was just wondering what the proper values were to put in
the config files...

Grateful for any guidance. I know this seems like a basic question,
but, for some reason I've a processing block on this right now...

tnx 73
Bryan WB0YLE

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