[Elecraft] [K3] Issue with HI CUR on 12m

[Bill Coleman]

While it may not be a “perfect” material, it was what I had on hand, and I measured over 800 ohms choking impedance on the band of interest. 

It’s definitely doing something useful.

I have your cookbook, and will use it for future projects.

> On Oct 12, 2020, at 10:05 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> On 10/12/2020 5:55 PM, Bill Coleman wrote:
>> It is unlikely the balun is “breaking down”. It’s a current balun - #43 ferrite beads on RG-313 coax. It can easily handle a kW or more.
> That's a common mode choke, and #43 is a terrible material for the HF bands. See my "cookbook" at k9yc.com/publish.htm as well as the Ham's RFI tutorial, which explains things conceptually.
> 
> "handle a kW," perhaps, but only because it's also unlikely to be doing anything useful. :)
> 
> 73, Jim K9YC
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Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
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