[TowerTalk] Resistor Across a Choke Balun

[Edward McCann]

As long as we’re looking at static bleed once again, I pass on a brief note by AD5X you may find useful.

http://www.ad5x.com/images/Articles/Static%20Bleed.pdf


Ed McCann
AG6CX


> On Jun 30, 2022, at 7:10 PM, Jeff Blaine <KeepWalking188 at ac0c.com> wrote:
> 
> 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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