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
Vertical Antenna 8 bands trapped (10-12-15-17-20-30-40-80m) with wire radials 1/4 lambda for each one band.
10-40m Full bands coverage. 80m about 120Kc/s RF chocke for electrostatic protection. 2 KW pep SO239 Technical specifications: Height: 11.3 m approxim... Read more
Long Range Wi-Fi Dish Antenna by AB9IL
Long Range Wi-fi Dish Antenna THIS INEXPENSIVE WI-FI DISH ANTENNA OUTPERFORMS ALL OTHERS! Presented here is a project showing how to convert common sa... Read more
HF Antenna Traps V3.0
Version 3.0 of our popular traps are now available. Version 3.0 are supplied with 4 high quality Cornell Dubilier CDV16 RF Mica capacitors for greatly... Read more
A Simple Wire Tuner
Here’s a basic, but effective and efficient, antenna tuner for feeding random wires, especially half-wave end-fed wires. Read more
Tape Measure Yagi Beam Antenna – Ham Radio Q&A
Tape Measure Yagi Beam Antenna Parts List 1 25 foot 1 inch wide steel tape measure 1 10 foot piece of 3/4 inch Schedule 40 PVC Tube 2 3/4 inch... Read more
Review
Why You Should (and shouldn’t) Upgrade Your Amateur Radio License – Ham Radio Q&A
“Congratulations! You just earned your FCC Technician amateur radio license. I bet when you took the test, one of the examiners asked if you wis... Read more
Icom AH 705 Auto ATU for IC-705 – Review, and Mystery Solved?
Automatic antenna tuner specifically designed for IC-705 Read more
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TERMN-8R Radio: Third Party Review and Walkthrough [ Video ] – Anytone
Anytone TERMN-8R Radio: Third Party Review and Walkthrough Read more
Equipment
New DV4Home V2 digital IP transceiver for D-Star, DMR, C4FM, NXDN
DV4home V2 The DV4home V2 is another member of the successful family of DV4 products. As usual it supports all digital modes, while simplifyi... Read more
Xiegu X108G
X108G Outdoor is X108’s upgraded version, It is a compact single conversion HF transceiver covering 0.5 to 30 MHz. Special optimized the Receive Chann... Read more
PANADAPTER For Any Radio DC – 160 MHz SDR Antenna Switch
PANADAPTER For Any Radio DC – 160 MHz SDR Antenna Switch Read more
HF Clock / Satellite Tracker /Solar Index Touchscreen Terminal
HFClock Internet Based Clock System – 9″ Tiger Maple Frame The HFClockTM represents the industry’s first highly integrated clock designed... Read more
A compact 5 band QRP SSB transceiver in SMD technology
A compact SSB transmitter/receiver will be presented. This unit covers 5 bands within the amateur radio spectrum (3.5, 7, 14, 21 and 28 MHz). Receiver... Read more
News
ARRL Now Provides Free RF Exposure Calculator
The FCC has adopted guidelines and procedures for evaluating environmental effects of RF emissions. Under the new FCC rules, some amateurs need to per... Read more
Faith Hannah Lea, KD3Z, is Amateur Radio Newsline 2021 Young Ham of the Year
Faith Hannah Lea, KD3Z, of Palm Coast, Florida, has been selected as the 2021 Bill Pasternak WA6ITF Memorial Amateur Radio Newsline Young Ham of the Y... Read more
Just Released: More Arduino for Ham Radio
The new book More Arduino for Ham Radio by popular author and experimenter Glen Popiel, KW5GP, builds on the success of his two previous titles, Ardui... Read more
Woody White, KZ4AK, Wins the July 2021 QST Cover Plaque Award
The winning article for the July 2021 QST Cover Plaque award is “A Sensitive Field Strength Meter for Foxhunting,” by Woody White, KZ4AK. The QST Cove... Read more
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SSTV Transmissions Scheduled from ISS [ August 6 – 7 ]
Friday and Saturday, August 6 – 7, Russian cosmonauts onboard the International Space Station (ISS) will transmit slow-scan television (SSTV) images f... Read more
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