[TowerTalk] Resistor Across a Choke Balun

[Michael Tope]

Some lightning arrestors use a shunt-inductor from coax center-conductor 
to ground followed by a capacitor in series with the center-conductor. 
This works in conjunction with a gas-discharge tube:

https://www.arraysolutions.com/as-303u     <Scroll down for the schematic.>

There is a short explanation of the theory of operation here:

https://www.arraysolutions.com/pdfs/AS-3xxManual.pdf

73, Mike W4EF....................

On 7/1/2022 9:22 AM, Chuck Dietz wrote:
> I’m not sure what “AC coupling the feed line” is.
>
> Chuck W5PR
>
> On Fri, Jul 1, 2022 at 11:05 AM John Keating <john.keating at sbcglobal.net>
> wrote:
>
>> Either a resistor or choke will work to bleed off static, as others have
>> stated.
>>
>>
>>
>> But, note that a suitably sized resistor introduces a high RC time
>> constant,
>> which in the event of a lightning strike will not bleed fast enough nor
>> survive the high voltage level to prevent equipment damage. The ultimate
>> protection is provided by AC coupling the feedline and shunting to ground
>> with chokes and gas discharge tubes on the antenna side of the coupling
>> capacitor.  See article by Eisenbrey, AB5WG, Electric Radio magazine, #284,
>> Jan 2013.
>>
>>
>>
>> AI6LY
>>