WOW!
That's a new one. I never thought you could have too many turns on the
torroid. I guess it makes sense, but I've always been told that the more
turns you can get around one of those, the better since the inductance (and
thereby RF resistance) goes up with every turn through the torroid.
I'll have to look into that.
Does anyone have a "practical" guide for winding torroids printed up? It
would be helpful because I think the common assumption is the more turns the
better..........
73,
Jon
NA9D
-------------------------------------
Jon Ogden
Sales Engineer
Cain-Forlaw Company
847-202-9898 (Voice)
847-202-9896 (Fax)
jon.ogden@cain-forlaw.com
> -----Original Message-----
> From: Palomar Engineers [mailto:Palomar@compuserve.com]
> Sent: Tuesday, November 20, 2001 5:17 PM
> To: owner-rfi
> Subject: [RFI] Interfacing to sound card RFI
>
>
> One possibility is too many turns on the -77 toroids.
> Capacitance across
> winding can leak the signal. For 20 meters try 5 turns
> closewound. Keep
> winding ends apart. Worth a try anyway -- Jack, K6NY, Palomar
> Engineers
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