[TowerTalk] Resistor Across a Choke Balun

[Máximo EA1DDO_HK1H]

If the vertical is monoband, you can use a 1/4 coax stub, with closed far end, connected to ground/earth.

73, Maximo EA1DDO

<http://foro.ea1ddo.es/>


________________________________
De: TowerTalk <towertalk-bounces at contesting.com> en nombre de WW3S <ww3s at zoominternet.net>
Enviado: viernes, 1 de julio de 2022 1:16
Para: Jeff Blaine <KeepWalking188 at ac0c.com>; towertalk at contesting.com <towertalk at contesting.com>
Asunto: Re: [TowerTalk] Resistor Across a Choke Balun

so what is the best way to drain static off a vertical with either a
resistor or choke?

------ Original Message ------
From: "Jeff Blaine" <KeepWalking188 at ac0c.com>
To: towertalk at contesting.com
Sent: 6/30/2022 8:49:31 PM
Subject: Re: [TowerTalk] Resistor Across a Choke Balun

>After getting my hands on a floating 80m vertical one summer and then getting up off the ground, I decided then and there that the 50K 200W resistor in my junk box could do some good and maybe save me a future surprise.  Ran it that way for a few years until it came down in 85 mph winds once night.  Never got shocked again. I'm more careful now - don't need to learn that lesson more than once...
>
>73/jeff/ac0c
>alpha-charlie-zero-charlie
>www.ac0c.com<http://www.ac0c.com>
>
>
>On 6/30/22 7:45 PM, Jim W7RY wrote:
>>You are correct Ed.
>>
>>73, Jim W7RY
>>
>>On 6/30/2022 7:01 PM, Edward McCann via TowerTalk wrote:
>>>I think the query had to do with static-relieving resistor or choke across his antennas terminals effective at DC, if I read it correctly.
>>>
>>>Ed McCann
>>>AG6CX
>>>
>>>>On Jun 30, 2022, at 3:34 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
>>>>
>>>>On 6/30/2022 2:57 PM, KD7JYK DM09 wrote:
>>>>>I've looked on and off over the years for a tutorial, but not had any luck, can anyone suggest a route of study for me?
>>>>Yes. k9yc.com/RFI-Ham.pdf includes an extensive tutorial on how ferrite chokes work, as well as a lot of other fundamental EMC concepts.
>>>>
>>>>k9yc.com/publish.htm includes two choke "Cookbooks," one for MF/HF, another VHF/UHF. The MF/HF cookbook is based on more than a year of winding and measuring more than a thousand chokes; the VHF/UHF cookbook is based on Fair-Rite data sheets for specific cores. This material has been in the ARRL Handbook for a while.
>>>>
>>>>There's also an applications note on identifying RF noise by type and providing advice on how to locate and kill it. It includes winding guidelines for clamp-ons at the source of noise.
>>>>
>>>>73, Jim K9YC
>>>>
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