[RFI] #73 beads

[Michael Aust]

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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