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[RFI] Balun designs chokes

To: <rfi@contesting.com>
Subject: [RFI] Balun designs chokes
From: e73m@e73m.com
Date: Sun, 08 Jan 2012 14:14:52 -0600
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
Hello,

  did anyone measured balundesigns.com chokes. I have tried to make 
replica with FT240-K core and wound as on pictures but simple S21 
measurements shows poor response below 21MHz, nowhere near their 
published charts.

It looks like their core is a bit different then then standard FT240-K 
core as used in Comtek/DXengineering chokes.

73 Danny E73M

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