On Thu, 14 Feb 2008 20:53:55 -0700, Tim Groat wrote:
>The technical data is available online:
There is MEASURED data on my website for 1-14 turn chokes wound with #18 wire
on 2.4" toroids in #31, #43, #61, #77, and #78. There is also MEASURED data
for coaxial chokes on #31 cores.
http://audiosystemsgroup.com/RFI-Ham.pdf
>To get the same impedance on the 160M band, you need about ten times as
>many turns with #2 powdered iron (mu = 10) as you would with #31 ferrite
>(mu = 1000), or about eight times as many as with #43 ferrite (mu =
>600)--all for the same size core.
WRONG! For suppression, what matters is u'' (resistance), not u'
(inductance). See the tutorial in the link above.
73,
Jim K9YC
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