[TowerTalk] Common Mode Choke Question

[Carol Richards]

Jim,

I purchased them many, many years ago when they were relatively 
inexpensive. Thank you for enlightening me as to their content and quality.



Carol



On 9/27/2017 6:30 PM, Jim Brown wrote:
> Hi Carol,
>
> Amidon does not make cores, they sell stuff made by other companies, 
> and terribly high markups. 2.4-in cores are made from dozens of 
> different magnetic materials, all very different from each other.  
> Study k9yc.com/RFI-Ham.pdf  and http://k9yc.com/KillingReceiveNoise.pdf
>
> 73, Jim K9YC
>
> On 9/27/2017 11:43 AM, Carol Richards wrote:
>> Hello,
>>
>> At present I have an inverted "L", 100+ feet vertical with 4 elevated 
>> radials, about 130 feet long at 10 feet in height. I am about to 
>> construct a CM choke. On hand, I have 4,  Amidon 2.4 inch cores. From 
>> the reading, it seems that I should have 5 cores and about 5 turns of 
>> RG8 coax. I can I get away with 4 cores?
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