[RFI] tips on building common mode chokes

[Jpock]

Jim,

Do you have a planned date for your pending publication?  I would like to be able to read what you have to say.

Regards,
Jim N9PXO

Life is Good☺

-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Jim Brown
Sent: Wednesday, October 31, 2018 6:45 PM
To: rfi at contesting.com
Subject: Re: [RFI] tips on building common mode chokes

Hi Bill,

I strongly suggest that you hold off on this, pending publication of 
major work that I've been doing on these chokes over the past year.

73, Jim K9YC

On 10/31/2018 11:56 AM, bill K7WXW wrote:
> I am building a set of feed line common mode chokes to test in my 
> shack, using K9YC's published test data and charts (mahalo, Jim!).  
> Since the chokes will be inserted into existing feed lines, each 
> choke, wound on a type 43 or 31 2.4 inch toroid, will be terminated 
> with SO239 and PL259 connectors.  I run 200W maximum though my normal 
> operating power is less than twenty.
>
> The bifilar chokes use #14 or #12 THHN wire. I can install a PL259 
> solder connector designed for LM400 pretty easily on either but the 
> SO239 side of things is giving me fits. I just can't figure out how to 
> nake a solid solder connection with wire this size and the standard 
> SO239, whether in bulkhead or panel mount form.  Is there some version 
> of the connector I just haven't managed to locate? Some trick to 
> getting big wire in a small hole? I've been staring at photos of other 
> people's chokes for a couple of days and haven't figured it out.
>
> I will also be making coax versions with both toroids and the clamp on 
> ferrites though I am inclined to the bifilar versions based on Jim's 
> data. The idea is to compare them all side by side in operation and 
> see which work the best in my situation. I'd also test them on a 
> vector analyzer if I had one, but alas I don't.
>
> Thanks in advance!  73 de bill K7WXW
>
> ______________
> brevity is beautiful.
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi


_______________________________________________
RFI mailing list
RFI at contesting.com
http://lists.contesting.com/mailman/listinfo/rfi