[TowerTalk] Resistor Across a Choke Balun

[Jeff Blaine]

Both ways work fine.

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com


On 6/30/22 8:16 PM, WW3S wrote:
> 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
>>
>>
>> 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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>