Topband: Commond mode choke for Beverage

[Filipe Lopes]

Hello JC,

Thanks for your answer.

I just ordered a few 2631803802 and 5943003801 from mouser.

With these ferrites I ask the same question, should I put the choke close
to the 9:1 Balun or near the switching box and how many turns? some bevs
have the feed point at +- 60m away from the switching box.


73's Filipe Lopes
CT1ILT - CR6K
F4VPX - TM3M

2015-10-12 15:40 GMT+02:00 JC <n4is at comcast.net>:

> Hi Filipe
>
> Zero , you should use material #31  or #77 , The core you have is not good
> for low bands.
>
> JC
> N4IS
> -----Original Message-----
> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Filipe
> Lopes
> Sent: Monday, October 12, 2015 8:46 AM
> To: topBand <topband at contesting.com>
> Subject: Topband: Commond mode choke for Beverage
>
> Hi guys,
>
> I am about to add a common mode choke to isolate the antenna from its
> feedline to each of my beverages and I only have FT240-61 ferrites. My
> question is how many turns should I do on the ferrite using RG58 (all my
> bevs are fed with RG58). Also should I put the choke near the 9:1 balun or
> near my bev switching box?
>
> Thanks in advance.
>
> 73's Filipe Lopes
> CT1ILT - CR6K
> F4VPX - TM3M
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