[time-nuts] Lightning arrestors for GPSDO antenna

Martin A Flynn maflynn at theflynn.org
Fri Oct 17 11:35:55 EDT 2014


Dave,
We have a 26 dB Lucent  (TMG-HR-26NCM) antenna mounted on the gable end 
of the N2MO station.  The feed line (1/2 superflex) runs straight down 
to a watertight steel box with a Polyphaser GPS protector.   The 
superflex shield is tied to the ground with the standard Andrew kit.

Both the antenna mounting pipe and protector have a #2 grounding wire to 
an 8' rod.   When the ring ground is replaced we will weld it to 
existing rod from two directions.

I can prove links to pictures if it helps.

Martin Flynn

.



  26dB
On Thu, Oct 16, 2014 at 4:34 PM, Dave M <dgminala at mediacombb.net> wrote:

I'm looking for effective coaxial lightning arrestors for my GPSDO
antennas.
I've seen several types; those completely enclosed in a one-piece metal
enclosure (no replaceable components) and those having a replaceable gas
discharge tube seem to predominate the list.
I'm looking closely at the gas discharge tube types, and am curious as to
their effectiveness and durability.  I'd like to know stuff like; are they
effective in dissipating a static charge, how do I know when the gas tube
needs to be replaced, are the gas tubes of a special type, are replacement
gas tube easily available, etc.

I'm interested in opinions and experiences with arrestors and
recommendations for which type is most effective.

Thanks for comments,
Dave M
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