VHF/UHF HAM Mobile Antenna From Old TV Antennas

by TqW in Workshop > Science

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VHF/UHF HAM Mobile Antenna From Old TV Antennas

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Weekend, I grab an old TV antenna amplifier trashed around, to boost up my V/U handheld-radio, and I did it from all scrabs.

Easy Parts

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Other than Cat50 caxial cables, these are only things we need.

Attach the Telescop Antenna to PVC Albow

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One hole and screw it. as I am not planning to leave this antenna outdoors, there is no concern for rain protection.

Another Bigger Hole

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Drill another hole to pass the cable and split it.

Prepare for Soldering

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To brush the negative mash out, and bind them together.

Ring the negative and positive ends, are ready for soldering

Soldering and Tighting

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This is simple, ugly but works, since it's first run, no need to be beautiful or fine finish.

SL16 Plug Soldering

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Simple too, perhaps everyone has different theory / technique of doing this job, I wellcome you post your experience and advice. :-)

Gluing a PVC Pipe

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No text here.

Measure ROE and Test Run

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As the VHF band wavelength has 2Mts, we need about 47-50cm of each side of the telescoping antenna extended only, the original TV antenna has about 75cm each, we need to leave one or 2 ranges in.

The ROE test wasn't ideal (2.81) after adjustment, I got about 1.3 reading. this is just fine to make a test with friends, unfortunately, these days here in the north of Buenos Aires Argentina, the band is quite desert.

Enjoy the DIY. 73

LU9DDD