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Old February 28th 07, 03:39 AM posted to rec.radio.amateur.moderated
Steve Bonine Steve Bonine is offline
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First recorded activity by RadioBanter: Dec 2006
Posts: 169
Default Crossband repeat

Jon Kåre Hellan wrote:
"Richard Crowley" writes:

"Mike Mc" wrote ...
Steve Bonine wrote:
The sure-fire method I use is to use a dual-band HT and go over to the
2-meter input side and ID once every ten minutes. Thus all frequencies
are covered for ID.

Doesn't an ID originating on the 70-cm link end up being
transmitted on *both* frequencies? Am I missing something?


I thought the point of cross-band repeat was that input and output
frequencies are so far apart that you don't need cavity filters.
Which is why you can do it in a simple transceiver. If true, what you
send to it on one band only gets transmitted on the other
band. Correct me if I'm wrong.


You are not wrong. But assume that the crossband repeater is just
sitting there listening on 2 meters and re-transmitting what it hears on
70 cm. The owner is just listening, not transmitting. But the
crossband repeater (the mobile rig) IS transmitting on 70 cm because
it's functioning as a repeater; what it hears on 2 meters it transmits
on 70 cm.

Where's the id for the 70 cm transmission?

The person who is transmitting on 2 meters is id'ing those
transmissions, but that id does not apply to the 70 cm RF from the
crossband rig.

I see a way around this for the scenario I originally mentioned, but I
do not know if the crossband rigs can be configured this way. In that
scenario, there is a person using an HT who can hear the 2-meter
repeater but cannot get into it with the HT. In this case, the 70 cm
transmissions from the crossband repeat rig are not needed; the HT user
can simply listen to the 2-meter repeater. What is needed is the repeat
from 70 cm to 2 meters. In other words, the HT user listens on 2 meters
and transmits on 70 cm; the crossband rig is just there to listen on 70
cm and retransmit that signal on 2 meters. I guess you could say
simplex instead of duplex.

Maybe this is a common way of using crossband repeat?

73, Steve KB9X