[TowerTalk] New 9 circle PCB with CMCs

[Stan Stockton]

Thanks for the work, Steve.  You are a good man and we appreciate it.

73...Stan, ZF9CW



On Tue, Feb 1, 2022 at 11:22 AM VE6WZ_Steve <ve6wz at shaw.ca> wrote:

> Today I uploaded a YouTube video describing my new 9 circle combiner board
> PCB design that has small Murata SMD CMCs on each RG-6 feedline.
>
> I include PCB file links to download in both KiCad format or a zipped
> Gerber folder if you want to build your own.  A BOM and an image of the
> schematic is included as well.
> This is the 9-circle array that was designed by John W1FV.
>
> I review why we need these CMCs, I talk about these small Murata chokes
> and some VNA tests I did and how these same units can be used as Magic-T’s.
> The new design also has a pin-out for the vcc and relay control lines, has
> the option for gas discharge tubes on the vcc and control lines, and the
> board has a slightly larger footprint than my previous designs so its its
> easier to access the F-connecters for field installation.
>
> The evaluation is still on-going at VE6WZ, but the board tested very well
> in the shop with the VNA, and I used it this weekend for the CQWW 160m test
> and it performed well.
>
> I know there are many that don’t like to watch a video, and I may build a
> PDF document, but in my prior life, all I did was make technical/
> scientific documents and I’d rather not do that anymore.
> It’s much easier to say things quickly in a video.  If a picture is worth
> a 1,000 words, then a video is worth a million.
>
> https://youtu.be/lVW1CmrzP7c <https://youtu.be/lVW1CmrzP7c>
>
> 73, de steve ve6wz
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