Here are just 3 sites from a simple Google search on "single point
Non DC grounded antennas (those without a trifiler wound balun or system NOT
measuring 0 ohms with an ohm meter across the coax) should always have a
high impedance choke or resistor to discharge static! A Polyphaser will NOT
normally dissipate static unless it has a DC ground path inside.
From: "Bill Jackson" <email@example.com>
Sent: Friday, December 31, 2010 12:48 PM
Subject: [TowerTalk] Recommended Coaxial Surge Protector for HF
> Happy New Year!
> I have a question for the Group about the various brands of coaxial
> Without going into a lot of detail, I have a SPG copper buss bar in the
> basement that serves as my coax and control cable entrance panel. Each
> and control cable has an appropriate Polyphaser protector mounted to the
> For my HF antennas, I currently have a Polyphaser IS-50UX-C0 protecting
> single run of 1/2" Heliax out to the tower where I have a remote antenna
> This morning during a heavy snow and sleet squall, I walked into the shack
> the sound of "tick, tick, tick" coming from the Drake LP-1000 low pass
> connected to the coax line running to the SPG in the basement. As soon as
> turned the antenna switch to the "off" position, which grounds the
> feeding the remote antenna switch on the tower, the "tick, tick, tick"
> stopped. This is the first time in the 15 years the antennas have been
> installed that I have ever heard a static discharge inside the shack.
> My first assumption is that the Polyphaser surge protector on the coax
> feeding the coax switch has lost it ability to shunt a high voltage
> build-up on
> the center conductor to ground. However, I have not seen any other
> such as high SWR indicating the protector may have gone bad. I do not
> have a
> schematic of the protector, but I assume there is some type of gas
> device from the center conductor to ground? Short of having a Hi-Pot
> is there any other way to verify the protector is still working as
> Reading some of the reviews on eHam.net would suggest there have been
> control issues with Polyphaser since the company merged with Transtector.
> anyone performed any evaluation or testing of the various brands of
> surge protectors, such as ICE or Alpha Delta that would recommend a
> for the Polyphaser? The current price of a IS-50UX-C0 is about $60. I do
> want to spend good money on a protector that is questionable or is going
> fail prematurely under QRO operating conditions.
> Thanks and 73
> de Bill, K9RZ
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