On Tue, 21 Feb 2006, Q wrote:
> Fellows...think about this,seriously! There are NO japanese mobile
> radio
> transmitters rated for 100% duty cycle,most are 20%! What happens when
> they overheat? Before they blow up,they put out spurs and junk all
over
> the spectrum! Adding a fan will help,but only delays the inevatible
> failure. Now on to the receiver...most are designed to be
> broadbanded,have lousy front ends and mixers,are prone to overload and
> intermod,not what you want. Why would you spend hundreds of dollars on
a
> pair of mobiles when the commercial surplus is available cheaper? You
> know-THE RIGHT TOOL FOR THE JOB!!! I am not just saying this to be
> mean,I have lived it! I have built repeaters out of the strangest
things
> and learned what works best at the most reasonable price. Leave your
> mobile rigs in your mobile stations! The right "tools" are out
> there....73,Lee
Equally, there are no scheduled disasters, diasaters don't have a
specified length, and disasters aren't catogorized as caused by American
Acts if God, or Jap Acts of God. The ability to use 2 transcivers to
make an quick repeater using the data jack is a useful tool.
I still run an Alinco DR-570 as one of my Crossband rigs. It is quite
old, and has been through a lot of abuse. I bought it 3rd hand.
In a pinch, I use one of my 2 Alinco DJ-580 Handhelds (They have
crossband repeat also). I bought one of them new in 1993. The other was
a basket case that I put back to gether.
I also use a Kenwood TM-V7 and a Yaesu FT-8900.
In comparison, using a Midland 70-0520CWB with a 70-2959-1 Vehicular
Repeater option (50 to 110W output on 6m) as a transmit station in
conjunction with a Kenwood TS-2000 at a remote site as receiving unit on
a one way cross band linked system resulted in tremendous heat from the
Midland; even at the 50 watt level. Using the Yaesu 8900 or the Kenwood
V7 at lower wattage levels yielded a muchlower operating temp. The
Midland LMR setup would not go be low 50W and the Ham rigs would operate
at 5W. At the operating levels built in to be user controlled, the LMR
product offered less power control and more heat, WHEN USED FOR
SOMETHING OTHER THAN WHAT IT WAS INTENDED FOR. I am sure the same can
be said about Jap/Ham units used for projects they weren't designed for.
If someone wants to use the DR-X35 series for repeater operation, that
is certainly their decision. I wouldn't try to move a mountain with
motorcycle, nor would I use a D9 Cat to clean up after my dog (he is
just not that big).
In other words, some community repeaters may only need 20% worth of duty
cycle, as they only get used 5% of the time. In some areas, some folks
talk a lot more, and there may be a lot more of them to talk.
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