Re: [TowerTalk] CM Choke

["Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>]

Just wind the choke using Jim Brown's (K9YC) tutorial. The chokes a so 
broad banded that the need to measure the resonant frequency is unlikely.
73, Roger (K8RI)

On 10/10/2017 Tuesday 5:15 AM, Máximo EA1DDO_HK1H wrote:
> Hi Carol,
>
>
> 43 mix works fine for CM chokes, but it depends the frequencies you need to 
> cover.
>
> Best procedure is to use a VNA and "tune" the choke for best choke impedance 
> over the required frequencies.
>
> Basically the number of turns, diameter, etc.
>
>
> I've been testing some 43 mix cores some days ago, and depending on those 
> variables, the choke will present the higher impedance over different 
> frequencies.
>
> You can hava a look at next link; http://foro.ea1ddo.es/smf/index.php?topic=3.0
>
>
> I am sure more experienced colleagues will you explain further next.
>
>
> 73, Maximo
>
>
> ________________________________
> De: TowerTalk <towertalk-bounces@contesting.com> en nombre de Carol Richards 
> <n2mm@comcast.net>
> Enviado: lunes, 9 de octubre de 2017 21:11
> Para: towertalk@contesting.com
> Asunto: [TowerTalk] CM Choke
>
> Hello all...
>
>
> Quick question... I know 31 mix is better, but I have 8 cores, 43 mix. I
> was thinking of 5 cores, 6 or 7 turns RG213 Or RG8X. Yes or no?
>
>
> Carol
>
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--

73

Roger (K8RI)


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