What length do I make a vertical antenna to match on 144.39MHz using 75 ohm RG6?

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What length do I make a vertical antenna to match on 144.39MHz using 75 ohm RG6?

Using about 30 feet of RG6.
Making a vertical ground plane antenna for APRS.
Will be using about 40-45 watts.

2007-09-01 13:11:32 · 2 answers · asked by Anonymous in Consumer Electronics ➔ Other - Electronics

2 answers

The problem I see here is that ham radios are 50 ohm devices. So are the antennas. 144.39 is in the ham 2 meter band. Using 75 ohm cable may not work well. 75 ohm cable is used for TV operation.

2007-09-01 16:40:17 · answer #1 · answered by Anonymous · 0⤊ 0⤋

Using this site
http://www.crompton.com/wa3dsp/hamradio/antcalc.html

The half wavelength is 3.241221 feet.

2007-09-01 21:58:36 · answer #2 · answered by TV guy 7 · 0⤊ 0⤋