Created a Yagi DualBand 2m/70cm from old TV Antenna

I ended up building a Yagi DualBand from an old TV Antenna

I was inspired by the videos at:

Since I had a 80″ boom I decided to create my own custom measurements, I used 440Mhz and 146Mhz on a 80″ boom and got the calculations from this Yagi Calculator at:

It came out to be 6-elements on 2m (146Mhz) Estimated Gain = 9.165 dBd and 9-elements on 70cm (440Mhz) = 11.311 dBd.

Took me about 4 hours of labor to put together.

After getting it up on the rotator at work, I tested it with my recently purchased MFJ-269 Antenna Analyzer.

The SWR on 2m is 1.0 at 148Mhz, and between 1.1 and 1.4 SWr on the whole 440Mhz band.

There seems to be alot of crackling on some frequencies, not sure what the issue is, though the signal strength is S9++.

The Yagi beats the Log Periodic by 2-S on 148Mhz, when pointed at my house in Brea, but the Elk beats the Yagi by 3-S on 440Mhz. Maybe it’d be better to separate the 2 yagi’s onto 2 booms and use a duplexer to split the signal.



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