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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