[TowerTalk] lightning arrester suggesstions

[J. Hunt]

 Polyphasers block DC and have pre-determined frequency and RF power level. Once exceeded, the Polyphaser shorts all energy to ground.  The response time is ~10 nanoseconds.   A person can not blink that fast :}   
Gas discharge units pass DC and can allow dangerous energy past the discharge tube.  
For folks that need to send a DC signal to a radio tower device, a separate control cable is used.  
A Bias Tee device inserts /  removes a DC signal from a feedline.  This Bias Tee device also creates an impedance bump (seen by an IFR oscilloscope) = signal loss.  Hence, I do not use them, use a separate control cable as needed.  
Thanks n 73,JamesKI5DQ   On Monday, December 15, 2025 at 09:06:16 PM CST, john at kk9a.com <john at kk9a.com> wrote:  
 
 That's a good point, Ron.  I am not sure if there is even a static discharge
with the GDT.  The Polyphaser coax protectors are in a nice easy to mount
enclosure and not terribly expensive but I have not used them in 20 years.


John


Ron WV4P wrote:

" Once again, most commercial sites use Polyphaser lightning
suppression They provide maximum protection, when compared to other
manufactures.
Thanks and 73,James KI5DQ"

Compared to what manufacturers ? What Data ? Please back up these claims of
"Maximum Protection" when it's just a GDT.

Ron, WV4P


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