Happy New Year! I have a question for the Group about the various brands of coaxial lightning protection. Without going into a lot of detail, I have a SPG copper buss bar in the basement that serves
I have PolyPhaser coax and control-line surge protectors, but they were all purchased before the company became part of the Smiths Group (to which Transtector -- of which I had not heard previously -
Now that I have looked again at ICE's document comparing their devices with PolyPhaser's, and at the description of the Polyphaser devices on the DX Engineering Web site, I see that both say that Pol
The common coaxial surge protectors use gas cartridges for protection. It takes hundreds of volts to cause the gas cartridge to fire and conduct to ground (off the top of my head, I think it is aroun
I simply put 3 Mohm in resistors into the balun I built for my 160 vertical. I hope that will stop static from building up :) Other things can take care of real surges (eg. the gas discharge tube sur
Here are just 3 sites from a simple Google search on "single point grounding" http://www.astrosurf.com/luxorion/qsl-lightning-protection3.htm http://www.w8ji.com/ground_systems.htm http://www.k1ttt.n
MOVs typically have too high capacitance to be used at RF (it low-passes the signal). -- Charles M. Coldwell, W1CMC "Turn on, log in, tune out" Belmont, Massachusetts, New England (FN42jj) GPG ID: 85
You can get spark gaps (aka gas discharge) that will conduct as low as 90V. Its a might higher voltage than a MOV, but like I said upthread, MOVs have too high capacitance for RF. -- Charles M. Coldw
PolyPhaser at one time used solid state rather than gas discharge as all of the ones I have here are solid state. Unlike gas discharge they are not self healing. Of course any of them take a big enou
You can easily check your lightning arrestor with a resistor and HV power supply. Use 500k-1 meg in series with the + lead. This will limit the current to 1 ma if the voltage is 1KV. Put a voltmeter