This video shows how I have made a mains filter that is extremely effective in reducing and in some cases eliminating completely EMC from the electricity supplying my shack. The filter consists of three turns of earth, neutral and live wires wound round a type 31 Fair-Rite ferrite core, part number 0431177081. I found details of how to make this on the website of Ian White, callsign GM3SEK, so thank you Ian for the information. You will see how this filter performs when comparing filtered and non-filtered mains power on 160m, 80m and 40m.
Antenna
Antenna Yagi MB8 15-20 Separate Feed line – MomoBeam
The MB8 15-20 SF is a fullsize antenna for 14 MHz and 21 MHz. No traps or adapting systems where used to obtain fantastic performances and the best ba... Read more
W1ZR Wins August QST Cover Plaque Award
The winning article for the August 2016 QST Cover Plaque award is “Antenna Analyzers — the Basics” by Joel R. Hallas, W1ZR. The QST Cover Plaque... Read more
Bushcomm Ranger HF-2 – Portable HF Antennas
Portable HF Antennas Antenna, HF-2, Broadband HF, Portable, Kevlar Reinforced, Black PVC Sheath, 80-10 Meters,125W PEP/40W CW, Each Portable Antenna B... Read more
Steel Slinky Dipole Antenna 10 to 80 meters band
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Transmission Line Calculator by AA3RL
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Review
Yaesu FT-991 vs FT-991A
Yaesu FT-991A The New FT-991A – HF/50/144/430 MHz All-Mode “Field Gear” Transceiver – Coming October 2016 The FT-991A is the next-generation of the wi... Read more
GMRS Midland Micromobile Review, MXT275, MXT400 Radios
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A close look at the MFJ-1708SDR T/R switch
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Equipment
Hi-Z Antennas Shack Switch 2 SS2
Hi-Z Antennas Shack Switch 2 is a modern array direction selection console with an easy to use, large manually operated knob with a continuous rotatio... Read more
Icom AH-705 Announced on Christmas
AH-705 HF/50 MHz Automatic Antenna Tuner Features Covers the 1.8 MHz to 50 MHz bands, using a long wire element 2-way power sources using alkaline bat... Read more
DXMini Pi-Star Hotspot for Amateur Radio
DXMINI is your gateway to digital HAM radio… Our devices enable your digital radio to communicate over the internet sending your communications... Read more
K-Pod Control Panel for the K3S & K3
A Compact Accessory Panel for Contesting, DXing, and Customized Station Control Our new K-Pod is the ideal companion to your Elecraft K3 or K3S Transc... Read more
News
Yaesu FT-DX10 HF Transceiver – Is it Right for You?
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What is the Base Holding Up My Hexbeam?
William Noble asks about the base used to hold up my MFJ-1846 Hex Beam antenna. The actual base that allows for a fold-over mast was designed by frien... Read more
ARISS APRS Testing
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Moldova Peace Corps to Sponsor March 3 Amateur Radio on the International Space Station Contact
An Amateur Radio on the International Space Station (ARISS) contact between youngsters and youth in Moldova and an International Space Station (ISS) c... Read more
John Portune, W6NBC, Wins the February 2021 QST Cover Plaque Award
The winning article for the February 2021 QST Cover Plaque award is “Create Your Own 1:1 Coax Choke Balun,” by John Portune, W6NBC. The... Read more
