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OK -
time for my "stupid question of the day". I have access to several 800 MHz
Maxtracs. Can these be moved up sufficiently to get them into the 902/903
MHz range? We want to start adding remote receive links to our 444.55
repeater, and we'd like to use 902/903 for the link freqs. (We already have
acquired a 6-channel voter...)
I'm
totally new to this voter thing, so please be gentle!
:-)
Thanks!
Mark -
N9WYS
Maxtracs, GM300, and CDM series are all good
radios!
[EMAIL PROTECTED] wrote:
Hi All!
As the title suggests, I have a couple of questions about the use of
Maxtracs as repeater radios, links, etc. I'm a die hard Micor man with
3 Micor and 1 Mastr II repeaters on the air so forgive me as I
move from 1970s to 1990s technology! Hi Hi!! I hope these
don't sound to elementary.
All the time. If yours will allow you to program
the pins .. its easy. I have used S-com, and Link-Comm controllers on
Maxtracs, CDM series, GM series radios.
1. I've seen the MRT articles for linking 2 maxtracs together,
besides the RICK and these adapters, has anyone rig a full blown
controller, say a Scom 7k to these bad boys using the 16 pin plug on the
back?
2. Under the software control of these radios (RSS) can the RF power
out be dialed down low enough as not to mess the finials and still drive an
external PA? Low enough maybe to drive a Micor 60-100 PA. (In
the Micor, if you turn the power down to low the finals don't like it... a
lot!) Is your radio a 40 or 45 watt version ... then it will
only go down to 20 watts and still hold specs. If it is a 20 watt version,
then it will go all the way down to 1 watt
(model # beginning with D44 is
UHF high power, D43 is VHF hi power, D33 is VHF low, D34 is UHF low)
3. Not being as robust as a micor/mastrII, what about heat, cooling,
fans? Do these radios have any kind of continuos duty
rating? I use cooling fans on even the ones that are just
link radios. I also run them at 20 watts for hiigh power units, or 10 watts
for low power units.
4. Some have called these radios "barn doors" for being so wide open on
the front end. Has this been a problem? Can they be
preselected? This was a good thing on the Micors! I
preselect them using bandpass cavities, or you can use the DCI filters or
celwave preselectors (the latter mentioned is sold as an option with this type
unit for repeater use.)
5. What other pit falls have I missed? Check the PA
transistors, I usually resolder them with silver solder. If you do not do
this, and they get a little too warm, they will unsolder themselves. The
silver solder gives you a little more temperature range.
A couple of Club members in our weather spotter group are crossbanding
an UHF to VHF maxtracs to get back to the repeater and it sounds good and is
surprising simple (KISS) to rig and operate. It almost seems to
simple.
I know this is basically a GR300 so how do they
compare? A GR300 is just two GM300 mobiles in a box with a
Rick interface and usually a celwave notch only duplexer with 15 amp
supply.
They have done their homework so now I need to do mine!
Thanks all!
Keep the flames to a minimum!
Brian, WD9HSY
PS ... OH Boy! SMT! Just what I need with
Bifocals!
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