[600MRG] OFF Topic - Need info for toroid to choke RF on phoneline

[Edward Larsen]

Lower frequency higher ui material would be easiest to wind a choke on.  I
suggest 75 material, perhaps a FT75-240 core which is 2.4" outside
diameter.  The website below has a calculator that one can use to determine
the amount of choking inductance in uH for different core materials and
core sizes.
73
Ed, KI6R

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On Fri, Aug 4, 2023 at 10:13 PM Andy - KU4XR via 600MRG <
600mrg at mailman.qth.net> wrote:

> Hello Gentlemen:
>
> I am needing a toroid that will choke off 2.5 KW on 1390 KHz
> on a phoneline in the TX building connected to a dial up
> remote control unit.
>
> What material is good for this , and sources to obtain it.
>
> Thanks for suggestions: 73
>
> Andy - KU4XR
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