Re: Crossband/Portable repeaters
- Here in Colorado, we have two 2 Meter pairs designated for statewide
use for
portable/emergency/special event repeaters. These pairs get used to
fill in the dead spots when
emergencies occur. A number of clubs and ARES groups have portable
repeaters set up
on these pairs. (Good band planning by whoever put these in place
years ago.)
- Some of the emcomm folks use dualband transceivers with crossband
repeat as a inexpensive way
to extend radio range (often used to extend HT range from inside a
building or other bad spot).
These radios don't meet the letter of the law (FCC regs) with regard
to identification (my opinion,
you mileage may vary.)
- We do not have any designated frequencies for crossbanding to 440 MHz
in the bandplan.
Most people just find some lightly used uhf simplex frequency.
- If conventional transceivers are used, the power needs to be reduced
or additional cooling
supplied due to 100% duty cycle operation.
- I constructed a crossband repeater using two transceivers and an
NHRC-6 controller that knows
how to handle the ID of two transmitters appropriately (most
repeater controllers do not).
http://www.nhrc.net/nhrc-6/
- One issue with a vhf/uhf crossband repeat set up working into a
repeater....the repeater transmitter
must drop before the crossband repeater can turn the link around.
Shortening the hang time on
the conventional repeater (or using CTCSS that drops with the
received signal) helps this issue.
73,
Bob K0NR
[EMAIL PROTECTED]
[email protected] wrote:
> From: "Paul Yonge" [EMAIL PROTECTED]
> Date: Sun May 7, 2006 10:12pm(PDT)
> Subject: Portable Repeaters
>
> I've not been too successful in convincing the various Upstate New
> York Amateur Radio Associations that simplex repeaters are the answer
> for providing portable repeaters in critical incident response
> situations. They are relying on the fixed repeaters to provide
> adequate coverage but there are areas where it would be advantageous
> to bring the repeater to the incident instead of trying to reach
> fixed repeaters with hand-held units from some isolated locations.
> There are, of course, coordination problems with portable duplex
> repeaters and there is no apparent interest in agreeing on a wide-
> split pair of odd frequencies to avoid the conventional-frequency pairs.
>
> What experience has there been with the use of portable cross-band
> repeaters to enable hand-held units using a 440 MHz simplex channel
> to reach the portable repeater that will relay the message through to
> a two-meter fixed repeater?
>
> Paul Yonge, W2ARK
> MIDLAKES REPEATER
>
> [EMAIL PROTECTED]
>
>
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