I am speaking of the radius of the coax bend. To have a coax bend
radius of 3" the torroid would be huge.......the size of a large coffee
can. A 3" OD, x 1.5" ID torroid would typically have a winding radius
of less than ~1", even with 2 stacked cores. For my "ugly balun"
project I use 4" ID PVC which has an OD of ~4.5" and which provides a
bend radius of 2.25".
73
Bob, K4TAX
On 2/7/2016 10:32 PM, Chuck Catledge wrote:
It’s quite practical to use 25 to 35 mm radius bends of RG400 for large ferrite
cores including both the one-piece and the snap-on varieties. RG400 has the
same diameter as RG-58, i.e. 0.195”. See K9YC’s tutorial here:
http://audiosystemsgroup.com/RFI-Ham.pdf
All of the RF common mode chokes I have made using small cable (i.e. RG400
through RG6) use radii of 1-3 inches with the RG6 tending toward 3” and greater
due to the foam dielectric.
---
Chuck, AE4CW
From: Mel Farrer [mailto:[email protected]]
Subject: Re: [Elecraft] Balun Questions
SORRY, but the min static bending radius for RG-303 is 25 mm and RG-400 is 35
mm. For torroid wrap which is better?????
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