Inthis video I show more of the 2m Yagi build and more close up video of the antenna.Dimensions,Check out the Ham Radio Adventures Merch shop: https://shop.

Thecombined data of Tables 1 and 2 let us do this as an estimate of Directional Forward Power. Gain for 2-Element Antenna in dB: 7 Lit LEDs at 20 watts for dipole and 5 watts for Yagi. dB = 10 x Log (20/5) = 6.0 dB (= 1 S meter unit) Gain for 3-Element Yagi in dB: 15 Lit LEDs at 40 watts for dipole and 5 watts for Yagi.

AFive-Element, 2-Meter Yagi for $20 (457,324 bytes, PDF file) QST July 1999, pp. 34-37 Get about 10dB from a modified Radio Shack FM broadcast receiving antenna. An LPDA for 2 Meters Plus (839,246 bytes, PDF file) QST October 2001, pp. 42-46 This Log-Periodic Dipole Array (beam) antenna covers 130-170 MHz for those who also like monitoring.
5element 2-meter Yagi-- From The ARRL 2M 9 Element Yagi BiQuad For 2m/440 - FROM KE4UYP Building A 2-meter J-Pole Antenna By Jaden Cheap Yagi Antennas for VHF/UHF -- From Kent WA5VJB The Simplest Collinear-- From Ross W1HBQ Cycloid Collinear, a CP Omni for 2M from Ross W1HBQ Desk Buddy 2M Antenna - From Bob W2IK
MA6Vin the clear, up 20 feet. Here my experience has been surprising given the prevailing wisdom that you must be horizontally polarized for VHF DX. I would imagine that is true above six meters. But my own experience has been eye-opening. In 2011 I purchased a Cushcraft MA6V vertical that covers 20 to 6 meters.
Herewe take a look at building a short, loaded dipole for 20 Meters, 14 MHz.In fact, this is going to be half of a 2 element yagi for the 20M band.L/C Meter
HereI throw together a very simple beam antenna, for 144 mhz. It worked surprisingly well. I was able to make several qsos on only 1 watt. This is not my
Ineffect build one yagi antenna with the gain properties of two stacked yagi antennas. If even they are not exactly stacked at a long enough distance, or are compromised a bit on the bandwidth. However on 20 meters these antennas will not be as good as the longer boom tribanders or Steppir types, but will still work fine. The manufacturer
\begingroup$ Interesting. So there must be an effect, but a fairly slight one. By the way, if you're planning on actually building an antenna according to a 4nec2 model then you'll want to initially make the elements a few percent longer than the model specifies, and then trim to get the impedance you're looking for, usually resonance or low SWR.
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    • how to build a 2 meter yagi antenna