> Just replaced the 2 resistors in the control box of the
> g800 AGAIN, this time with 120 ohm 2 watters, if they go I
> am going to chuck this piece of s__t out the door & put up
> the ham 4.
> Mark
> ps:the last set of 120ohm 1 watters lasted less than 2
> weeks, Yaesu claims their aren't any problems with the
> design of the g800s control box, the first set of resistors
> died at 3 months (they supplied replacements) the second at
> 13 months (send it in we will fix it for around $100), this
> is now the 6th pair of resistors & the control board has
> burnt through so bad that I have had to replace traces with
> wire! The g800s control box is JUNK!!!
You'd be better off taking a breath of fresh air and finding out
what OUTSIDE the control box is making it fail. The most common cause
of problems is RF getting into the rotor cable.
Most common is poor lead dress. People commonly like to
install rotor cables in overhead spans. Not only is that a lightning
hazard, it just begs for severe RF problems.
I knew one guy who had problems with his rotor box (a Ham-M), burning
it up over and over again. Turned out an antenna about 50 feet from
the rotor cable was causing so much RF current to flow in the
control box some resistors actually smoked.
Exactly how do you route the leads, and how are all the antennas
installed? Do you use baluns? Do you bring all the cables down the
tower taped to the legs to ground level? Are the cables buried? Do
the cables come into the house at ground level? Do you shunt feed a
tower or use a Slopper antenna that exites the tower and everything
on and around it with high RF currents?
73, Tom W8JI
w8ji@contesting.com
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