Based on my understanding, the answer would be most probably yes. Is
this Polyphaser panel above ground? If there is not a very low
resistance/impedance connection from that to your SPG (single point
ground), then yes the surge energy will not all be shunted to ground by
the arrestors which are mounted above grade. My understanding, after
much discussions with Polyphaser and ICE folks, is the the best bet
would be to drop the cables down to the ground at the shack end, to your
arrestors mounted right at the SPG and then route them up to the
entrance. My only concern is that if this up route was long enough,
then a nearby surge may be induced into that length and end up in the
equipment. Email or call Polyphaser or ICE and ask their opinions; they
are the experts. Phil KB9CRY
ab5mm wrote:
One of my towers is a 114' Rohn 25 with the usual antennas on top. All
the control wires and coax come from the top down to the 25' level. A
tag line of 1/4" steel cable departs the tower at 25' elevation and
runs 55' over to the shack. This cable end is attached to the wooden
structure via a steel plate bolted to the fascia board with 2x8
backing. The coax and control wires are suspended from this cable and
enter the shack via a PolyPhaser panel. The tower is grounded well, as
are the guy post and guy wires.
Have I just invited Mother Nature over to burn my shack down with this
tag/support line?
Thanks for any input & 73,
Steve
ab5mm
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers",
"Wireless Weather Stations", and lot's more. Call Toll Free,
1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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