[TowerTalk] Common-mode choke

[Steve Hunt]

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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