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20m Twins - Phased Vertical Setup & Operation

MM0OPX Field Radio

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I had a small daytime window to once again setup 20m phased 1/4 wave verticals in my garden. These are spaced 1/8th wavelength apart (2.5m)

The phase/feed lines are 157 degrees
The Delay line is 39 degrees

This system is based on a design from the ON4UN Low Band DXing book. I still need to purchase this book myself.

Please also check out Justin's KG2RG YouTube channel.

channel

Any questions, please leave them in the comments below.

9 Comments

@mewintle 2 years ago

Perfect. Thank you for the detailed explanation of the antenna parts, then the nice shack and then a great real-world demo, then a wonderful wrap-up. All with frank discussion that didn’t just gloss over the unpredictability and need for patience. Just perfect!

@BenTrem42 1 year ago

Just what the doctor ordered. Plan is focus on QRP 14.060 ... top of mind is EFHW (long narrow site) but earlier today phased verts came to mind! (Norht/South)

@SteveH-TN 2 years ago

Thanks for sharing this video and information
73 Steve AA4SH

@vincenzofidanza2539 3 years ago

Hello Colin, in my opinion the simplest way to have a phased vertical array is to use a half square antenna antenna (+3db) that if you double it you can have a Bob Tail Curtain.
for even more gain. Feeding the half wave with a 1:49 balun on one hand you can also have multiband operation

@mikes6844 5 years ago

No apologies needed, radio waves don't necessarily behave at the time you want them too. Multi path behaves strangely and I would think the front to back takes effect when a greater distance is involved. I'd be interested in adopting a couple of raised tuned radials as to whether they aid directivity. Well done Colin this is another masterful vid produced from the heart - 73 Mike

@GM6DX 5 years ago

When your near a CW signal Colin just hit the Auto Tune button below the LED to the left of the main dial. It will zap the VFO right to that CW signal

@ianmono51 5 years ago

I've been thinking about a similar system to experiment with. This one looks really well put together. Have you considered adding to more poles for more direction?