Thanks Tim. I should have done my homework. Now I have 8 580’ terminated
beverages with Array Solutions transformers and terminating resistors. They are
quite robust but when the warmer, less stable weather comes I disconnect both
ends of each antenna to protect the hardware. Even so the odd Dec/Jan
thunderstorm can cause a problem so I have a supply of 450 ohm resistors of the
type recommended on this reflector, on hand for quick repairs! The maintenance
never ends! Steve, NN4T
From: Tim Shoppa [mailto:tshoppa@gmail.com]
Sent: Wednesday, January 13, 2016 8:47 AM
To: Steve Daniel
Subject: Re: Topband: 4 square
The DX Engineering arrays use hi-impedance verticals that need a preamp. The
preamp is especially susceptible to lightning damage and does not matter
whether it is powered on or not.
There are other 4-squares and 8-circles that use passive low-Z elements that do
not use preamps and have no circuitry that is susceptible to lightning damage
(although of course they can still be damaged by lightning.) W3LPL talks a
little about the use of hi-z elements vs lo-z elements (he uses Low-Z elements)
:
http://www.contestuniversity.com/attachments/W3LPL_Receiving_Antennas_2014.pptx
Tim N3QE
On Wed, Jan 13, 2016 at 8:17 AM, Steve Daniel <nn4t@comcast.net> wrote:
Used both the 4 square and 8 circle array by DX Engineering. Both work but, in
my thunderstorm environment, I spent many hours and as many dollars as the
systems originally cost repairing them over three seasons. This is despite
keeping the systems powered off, except when being used. The guys at DXE said
doing so would protect the systems. Unfortunately that proved not to be the
case at my middle Tennessee qth. Steve, NN4T
Sent from my iPhone
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