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Re: [TowerTalk] Common-mode choke

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Common-mode choke
From: Steve Hunt <steve@karinya.net>
Date: Mon, 19 May 2014 12:45:30 +0100
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Steve,

You say you want maximum common-mode impedance at 28 MHz. The best I've achieved is around 15,000 Ohms using 9 turns of RG58 on an FT240-61 core, Mouser part 623-5961003801. Replace the RG58 with a PTFE coax if you want to run QRO

73,
Steve G3TXQ



On 18/05/2014 19:15, GW4BLE wrote:
Hi,

Need to make common-mode choke to give maximum impedance at 28 MHz, coax is 
RG-213, but unsure of Fair-Rite part number for mix-43 toroids (order would be 
to mouser, so an appropriate part number from them?).

I've read the YCC article (2006?) by W1HIS), but needed clarification.

Any advice appreciated.

Thank you


Steve
GW4BLE

Sent from my iPhone 5S
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