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Re: [TowerTalk] Ferrite beads for LDF4-50?

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Ferrite beads for LDF4-50?
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sat, 23 Aug 2025 12:19:05 -0700
List-post: <mailto:towertalk@contesting.com>
On 8/23/2025 11:08 AM, john@kk9a.com wrote:
I mostly agree.  Connector loss is minimal.

Yes. About 15 years ago, I made up a lot of cables for a DXpedition, with soldered 83-1SP on 100 ft lengths of Commscope 3227, an RG8-size cable with a solid #10 copper center and foil/tinned copper braid that is superior to LMR400. For final test, I spliced all 13 of these cables together and measured loss by substitution using HP generator and spectrum analyzer. That's 12 barrels and 26 83-1SPs.

Loss at 200 MHz (as high as I went) was slightly less than the mfr's spec for the cable.

73, Jim K9YC



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