At 08:45 AM 08/25/08, you wrote:
OK, got the M-10's in the mail yesterday and will have to get them
over to the shop to program them. What I got for a freq spread is:
151.835 and 153.020 so I can t use a duplexer and will have to run a
dual antenna system. How far apart do I have to mount these to make
sure they work ok? I have a Motorola RICK to use and want to have
the units programmed for around 15 watts or so that way I don't burn
out the radios when we really need it. I am thinking that the
153.020 is going to be repeater input and the 151.835 is the output.
I will be running DCS on the system to avoid problems with the
system. The radios (CP200) are going to be programmed with MDC1200
signaling as the supervisors carry a HT1250 so they can see who keys
up and if there are any problems.
I need some help on getting the antennas set up and I can program
the rigs for the repeater use so no problem there.
Thanks
Peter Summerhawk-N0WRE
That split (under 1.2 MHz) is a little close for a baby notch-only duplexer.
Can you get a different input frequency further out?
If you can get a 4 mhz or so you will find it is much easier and much
cheaper to make it work.
A while back the Canadians surplused out a BIG bunch of high
band MSR2000s with 4-5mhz duplexers in them (inside the MSR
cabinet), and all of them that went into amateur service had them
ripped out and shelved.
If you can bump the receive channel further out then one of those
ex-Canadian would scratch your itch just fine, and the seller would
get some shelf space back, so it should be pretty cheap as well.
I wouldn't mind finding one of those myself - I have a use for one.
The repeater transmit channel would be in the 151-152 area and
the receive channel would be in the 156-158 area.
Mike WA6ILQ
