• For sale — TE Systems 2M repeater amp (100W FM)

    Looking for a 2M repeater amplifier? This is a continuous-duty, 100-watt, FM (class C) amplifier with a very large heatsink. Factory spec: max power 100 watts at 147.10 Mhz, and it will operate from 144 to 148 Mhz. Asking just $100 plus shipping.

  • For sale — FT-920 transceiver

    It’s time to clear out the DXing shack. I am offering for sale a great FT-920 HF+6M transceiver complete with an RTL-SDR system (IF-output) that provides full-band spectrum display with N1MM Logger, FSK and CW interface cables, and a SignaLink for audio RTTY, PSK, FT8 and meteor scatter modes.

  • Tracking progress with Athena log analysis

    View your real-time totals during a contest, and compare them in real-time with previous contests. Athena, created by PC5M (sk), does exactly that.

  • WSJT-X 2.0 — Why some FT8 stations don’t respond

    If you’re working FT8 using WSJT-X version 1.9.1 or earlier, you may not be able to work stations using the latest release candidate of WSJT-X 2.0. Update your software to the latest release version and all will work.

  • Adding 7 elements on 6M

    6M is about to be a whole lot more fun from VA7ST with the addition of an M2 6M7JHV yagi — 7 elements on a 30-foot boom.

The 80M elevated wire vertical array

Written by admin On August - 26 - 2010 0 Comment

Here’s a great 80M antenna: a pair of raised 1/4-wave (68′) verticals in the pine woods, using Christman phasing, and capable of firing in either of two directions. Mine aim east and west.

A cheap 40M DX machine: the twin half-square array

Written by admin On August - 19 - 2010 1 Comment

This may be the cheapest, lowest, no-radials-required, no fancy networks, way to get great gain on 40M. If you have some rope, trees, junkbox wire, a couple of DPDT relays, and some coax laying around, you have all it takes to build this antenna.

Phased 40M Wire Verticals

Written by admin On August - 15 - 2010 5 Comments

Here’s a two-element array of wire verticals for 40M — read about using passive phasing, then Christman phasing. Includes a handy online calculator for phasing line lengths, and audio clips of the array in action.