Homebrew HF SWR/Power Meter - na0tc.org
May 04, 2012 · RF Power Meter Components Forward Reflected Sensor Meter* RF IN RF OUT X X Directional ... Cost! $800 ~$0-50 $30 up Alpha 4520 5/4/2012. Digital Power/SWR Meters ... (Germaniums are best for QRP) Shield on coax used as a Faraday shield (grounded on one end only) Tandem Match Coupler
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The 43 Foot Vertical
www.na0tc.orgSep 03, 2016 · Electrically Short Antennas-The shorter the antenna, the lower the Rr -A Hustler 6BTV 80/40/30/20/15/10 meter vertical is 24 feet tall -On 80 meters, it is only 0.092 wavelength long -2Rr decreases approximately as 1/(length) -So Rr is approximately 5 ohms -With 10 ohms ground loss, the efficiency is 33% - Assumes no trap/inductor losses (trap loss could add 2dB)
Baluns & Common Mode Chokes - na0tc.org
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