Adding topband to a full sized elevated 80m vertical and putting N6LF’s QEX data to the test
This antenna started out as an 80m vertical – with160m capability added as a secondary consideration. In reflection, I’m very glad to have added the 160m operation as that is a fascinating band.
It’s now on it’s second version (v2), with a conversion from a trap-based to relay-based band selection and full matching net now complete.
From the diagram, you can see that 50 ohm feed line runs to the 2×6 switch (mounted on a tower about half way to the vertical), and from the switch onward to the vertical, it’s 75 ohm RG-11. The LC network is a few feet below the vertical’s base. It’s an elevated structure, with 10 elevated radials at head-height. A control line runs from the shack to the vertical allowing some relay switching which engages the cap hats to shift the resonant point of the vertical from 80m to 160m – and to likewise set the L/C for the band in operation….. READ MORE
More
GRA-ULT01 Lightweight Portable Antenna Mast Mount Tripod Tower UHF SO239 Connector
GRA-ULT01 is a telescopic portable tripod for UHF connector portable antennas. Made by Gabil Radio in Taiwan. Designed as part of a portable, backpack... Read more
Force 12 FPA-20-OCF Vertical running through 8 to 6 meters
Does your neighborhood forbid antennas but allow flagpoles? Is tearing up your lawn to lay 64 radials not an option? Or maybe you just want a high-per... Read more
Tuning an Antenna without an Analyzer
“Lee, KD9SWA, wants to know how to tune his antenna without an analyzer as he does not have one right now. He has an SWR meter and some good met... Read more
Build your own Roll Up Slim Jim Antenna for the 2 Meter Ham Radio Band.
Build your own Roll Up Slim Jim Antenna for the 2 Meter Ham Radio Band. Read more
THE COKE LOOP Antenna by PY1AHD
“The Coke Loop is a Small Magnetic Loop Antenna tuned by a trombone-style variable capacitor made with standard soda cans. In Brazil we... Read more
Acom HF antenna V101
Acom HF antenna V101 FEATURES The V101 – 03AT antenna system consists of the Broadband Inverted Vee Dipole Antenna V101 and the automatic... Read more
DxGlider52: Ultimate DX-Contest Tribander 18 elements ~ 52ft boom
18 elements ~ 52ft boom ~ Amazing! WA3FET has done it again! The aptly named DX Glider is the Ultimate Triband Yagi. No compromise monoband pe... Read more
Folding Hexbeam
The design The folding Hexbeam is a 2-element directive antenna for five amateur bands (20/17/15/12/10m band, 6m band optional). It cons... Read more
