NW PA and have used them all.For full duplex,best results were with
folded dipole antennas.Stationmasters on VHF were always a problem.Ice?
Yeah,we get a lot on lake Erie's south shore but both types hold up well
as long as the tower doesnt collapse! 500 feet of Rohn 65G with 27 mixed
sticks and dipoles,5 Db-230's,an 8' dish with radome and an 800 meg
Bogner on top.The Rohn engineers nearly fainted when they saw it! Been
that way for 20 years though...
mch wrote:
>Western PA, and Stationmasters, Superstationmasters, and clones made by
>several other companies. The best built was made by Telewave, but still
>had the same problem after some time. All were top mounted, so
>supporting the top of the antenna was not an option. I've seen it on
>several dozens of them. There is a 'small' multinational tower company
>in my area who uses nothing but dipole antennas for the same reliability
>reasons.
>
>Yes, stationmasters are more numerous than the others, but how many are
>on repeaters? In my area, most PS systems are not full duplex. This is
>duplex noise, so it won't show on half duplex or simplex systems. It
>also won't show on UHF. Apparently, they give more in the wind. I can't
>say I've seen the same problem on a single UHF stationmaster. Of all the
>stationmasters used in my area, probably less than 2% are on VHF
>repeaters. In fact, in one county near me, EVERY VHF repeater in the
>entire county with a stationmaster has had this problem (all were top
>mounted, FYI). If you replace it with another, they are problem free for
>6 months to a year, then develop the same problem again.
>
>Of course, just because something is popular doesn't make it the best.
>
>Joe M.
>
>Daron J. Wilson wrote:
>
>
>>
>>
>>>And if it's for a VHF repeater, stay away from the fiberglass
>>>
>>>
>>antennas.
>>
>>
>>>They develop cracks that create a ton of duplex noise. The elements
>>>
>>>
>>are
>>
>>
>>>too long to flex in the wind, and they create cracks at the solder
>>>joints.
>>>
>>>
>>
>
>
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