The gentleman who began this thread was concerned with eliminating the OUCH!
he got when disconnecting the transmission lines when storms were
approaching.
Another question might be "do I really want to leave an open transmission
line in the shack that might receive a direct or induced lightning strike?"
In my case, the answer is NO. I saw one installation that took a big
induction hit with an open coax on a rig in the kitchen. The strike arced
from the PL-29 a foot or so to a built-in home intercom system, then to a
sink faucet on one side, and a central vacuum system outlet on the other.
Destroyed the intercom and piped vacuum system, and damaged the plumbing.
I have always left my lines connected to the rig. I have taken 4 or 5
induction hits and the only harm was antenna relays and power supplies
(easily and inexpensively fixed), as well as some consumer electronics
devices. Better that than jumping around to other stuff in the home, in my
opinion.
73, Sam AE5L
----- Original Message -----
From: "Grant Saviers" <grants2@pacbell.net>
To: "K2VI" <k2vi@cox.net>; <towertalk@contesting.com>
Sent: Saturday, May 14, 2011 7:52 PM
Subject: Re: [TowerTalk] zapped with my dipole. OUCH!
> My I.C.E. coax arrestors measure 680k to ground on the radio side. It
> seems like a good strategy to bleed off static with a high value
> non-inductive resistor. 10x that amount (6.8Meg) would handle 2500
> volts rms in a 2 watt carbon composition rated for the voltage.
>
> The antenna side I.C.E. has an toroid inductor to ground, value unkown.
> In a rare stroke of good luck the unit I measured was open circuit to
> ground on the antenna side. Inspection showed the center pin of the N
> connector hadn't been soldered. Now I have to take all of them apart
> :-( .
>
> Grant KZ1W
>
> On 5/14/2011 3:59 PM, Jim Lux wrote:
>> A 1meg resistor to ground?
>>
>> On May 14, 2011, at 13:29, "K2VI"<k2vi@cox.net> wrote:
>>
>>> It seems every time there's distant lightning and i go to disconnect the
>>> dipole i get this nasty discharge when i touch the pl-259. Im concerned
>>> it will eventually damage my tuner and or radio. The antenna is not dc
>>> grounded like my beam or vertical are. It is a ladder line fed antenna
>>> terminating into a 4:1 balun outside the shack and a 3' run of rg8 coax
>>> to the tuner. How can i bleed this static off? I heard from a ham friend
>>> the jump a 2.5 MH RF choke between the two terminals of the 4:1 balun
>>> where the ladder line connects.Any advice would be greatly apreciated.73
>>> tony k2vi
>>> _______________________________________________
>>>
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