[RFI] #73 beads

[Michael Aust]

It the interwinding capacitance that lowers
Isolation at 6 meters
73
Mike

Sent from my iPhone

> On May 24, 2021, at 8:37 AM, Michael Aust <wb6dji_dx at icloud.com> wrote:
> 
> FYI 
> Type 31 clamp on type chokes work at
> 6meters if you put many in series to drive
> Up the usable frequency compared to
> FT-240-31 since the 2.4 inch chokes are
> More inductive with multiple turns but work
> Great for <30MHz applications 
> ( More turns on 2.4inch donut cores lowers
> the high end isolation due to interwinding 
> Capacitance between the turns )
> 73
> Mike
> 
> 
> Sent from my iPhone
> 
>> On May 24, 2021, at 8:23 AM, David Hale <astronomerdave at gmail.com> wrote:
>> 
>> Okay, so I gave all the #73 beads to my daughter; maybe she can make
>> something clever out of them, jewelry or something. I guess I'm still
>> wondering if I should add a few sets of 2T #31 or if the two 10T #31
>> (2631803802) chokes don't provide any resistance at 6m. Dave N3WTK
>> 
>> 
>>>> On Thu, May 20, 2021 at 9:28 AM David Hale <astronomerdave at gmail.com> wrote:
>>> 
>>> 
>>> 
>> The tables for K9YC's chokes stop at 10m but I wonder if they don't still
>>> supply some resistive choking impedance at 50MHz.
>>> 
>>> After doing that I got to thinking, I wonder if leaving the five #73 beads
>>> is maybe good for 6m? Or maybe I should follow the guide here
>>> http://k9yc.com/ChokesVHF.pdf and include a series of 2T through #31
>>> clamp-ons? Are the #73 beads detrimental for the other bands?
>>> 
>>> 
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