This video from Michael Martens (KB9VBR) has changed my mind.
In this video, Michael discusses the pros and cons of this simple, effective vertical antenna. Michael feels the J-Pole may be the "ultimate" vertical antenna for the 10 meter band.
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=RZv94BvNxrQ.
Here are some comments from Michael (KB9VBR):
was looking for a powerhouse antenna for the ARRL 10 meter contest. Will the J-Pole vertical antenna pull in the DX? Build one along with me and find out.
My favorite amateur radio gear: https://amzn.to/3QXrYgz
VHF/UHF J-Pole Antennas: https://www.jpole-antenna.com
KB9VBR Wire 10 Meter J-Pole Antenna Plans: https://bit.ly/41h0ypB
Parts list
17' - 14 gauge stranded wire
7' 10" - 450 Ohm Windows Line
SO-239 Chassis Connector or
Scrap piece of coax with PL-259 installed
Want to build this for the CB or 11 meter band? Add 3 inches to the window line length (8' 1") and 6 inches (17' 6") to stranded wire. Follow the same construction steps and keep the feed point at 6 inches from the base. This will drop the frequency down to 27 MHz.
As a bonus, patrons can view unedited content from the ARRL 10 meter contest. Visit my page on Patreon for details: 
/ kb9vbrantennas
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Links may be affiliate links. As an Amazon Associate, I earn from qualifying purchases. This does not affect the price you pay.
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Like what you see? You can leave me a tip:
https://www.paypal.me/kb9vbr
Support Ham Radio Q&A by shopping at Amazon: http://amzn.to/2kO6LH7
Timestamp
00:00 Introduction
00:41 Why I don't sell 10 meter antennas
02:20 What is a J-Pole antenna
03:22 10 meter J-Pole antenna dimensions
04:00 Building a 10 meter J-Pole Antenna
06:10 Deploying the antenna
09:44 Testing the J-Pole during the ARRL 10 meter contest
13:48 Contest results and my thoughts on the 10 Meter J-Pole
My Parks on the Air setup:
Transceiver: https://amzn.to/3lmHoei
Battery: https://amzn.to/3xBGgbv
Tuner: https://amzn.to/2ZCNM9l
Folding Table: https://amzn.to/3xFIp5Z
Throw Weight: https://amzn.to/32QW2nB
Video Production Equipment:
Camera https://amzn.to/32UaXNX
Lens https://amzn.to/31mmDrX
Wireless Microphone: https://amzn.to/3xFVBb4
Microphone: https://amzn.to/3daoAdq
GoPro: https://amzn.to/3pkmP30
Music by license:
http://www.soundstripe.com
Contact Information:
Questions, comments, or business inquiries may be directed to kb9vbr@jpole-antenna.com. If you wish for your product to be featured on my channel, please contact me.
#Hamradio #AmateurRadio #POTA #ParksOnTheAir #PortableHamRadio
#10meterband #11meterband #JPoleAntenna #JPOLE #10meterantenna
#CBantenna #hamradiohowto
/ kb9vbrantennas
************
Links may be affiliate links. As an Amazon Associate, I earn from qualifying purchases. This does not affect the price you pay.
*************
Like what you see? You can leave me a tip:
https://www.paypal.me/kb9vbr
Support Ham Radio Q&A by shopping at Amazon: http://amzn.to/2kO6LH7
Timestamp
00:00 Introduction
00:41 Why I don't sell 10 meter antennas
02:20 What is a J-Pole antenna
03:22 10 meter J-Pole antenna dimensions
04:00 Building a 10 meter J-Pole Antenna
06:10 Deploying the antenna
09:44 Testing the J-Pole during the ARRL 10 meter contest
13:48 Contest results and my thoughts on the 10 Meter J-Pole
My Parks on the Air setup:
Transceiver: https://amzn.to/3lmHoei
Battery: https://amzn.to/3xBGgbv
Tuner: https://amzn.to/2ZCNM9l
Folding Table: https://amzn.to/3xFIp5Z
Throw Weight: https://amzn.to/32QW2nB
Video Production Equipment:
Camera https://amzn.to/32UaXNX
Lens https://amzn.to/31mmDrX
Wireless Microphone: https://amzn.to/3xFVBb4
Microphone: https://amzn.to/3daoAdq
GoPro: https://amzn.to/3pkmP30
Music by license:
http://www.soundstripe.com
Contact Information:
Questions, comments, or business inquiries may be directed to kb9vbr@jpole-antenna.com. If you wish for your product to be featured on my channel, please contact me.
#Hamradio #AmateurRadio #POTA #ParksOnTheAir #PortableHamRadio
#10meterband #11meterband #JPoleAntenna #JPOLE #10meterantenna
#CBantenna #hamradiohowtoChapters
Introduction
Why I don't sell 10 meter antennas
What is a J-Pole antenna
10 meter J-Pole antenna dimensions
Building a 10 meter J-Pole Antenna
Deploying the antenna
Testing the J-Pole during the ARRL 10 meter contest
Contest results and my thoughts on the 10 Meter J-Pole
Transcript
KB9VBR Antennas
