A 5 element wide spaced yagi for the 20m long path to Europe was installed at ZL6QH in May 2005. A photo of this “monster” antenna is shown above. Brian ZL1AZE can be seen on a ladder making the final adjustments to the open wire feeder connections, just before darkness arrived!
The yagi has a 16m boom length and is approximately 15m AGL on the Quartz Hill ridge. It is a light weight and rugged design, using aluminium tubing and ropes, as shown in the detailed drawing below. Conventional yagi designs with self supporting elements are not employed at ZL6QH as they would not survive the severe storms that are regularly experienced at the station.
Like other ZL6QH antennas, the antenna is fed with a 600 ohm open wire feed line. The feed line is matched to the antenna using a “3 wire” folded driven element.
The software model for the antenna shows that the maximum gain of the antenna (at 15m AGL) is close to 15 dBi at an elevation angle of 18 deg. The SWR is less than 1.5:1 over the range 14.0 to 14.3 MHz.
Recent tests in the 2005 CQ WPX CW contest indicate that the yagi offers performance similar to and often better than that provided by the existing Europe long path vee beam (300m legs).
This video shows the demo we showed at Ham Radio 2022, in Friedrichshafen, Germany. This demonstrates the core underlying technology behind what we’re... Read more
This is the review of a Mini portable PWR and SWR meter with built-in battery and High SWR warning buzzer. There are also the Xiegu X6100’s outp... Read more
23cm Band After review and approval by the IARU Region 1 Executive Committee and the IARU Administrative Council a presentation on preliminary Amateur... Read more
Dave, KZ9V stops by the shack, and share with us his memory keyer remote control box he built for the Yaesu FT-891 Read more
SCC Contest Committee has decided to cancel EUHFC 2022 due to the current situation in Europe related to the war in Ukraine. We do not see the point i... Read more
Due to some inquiry by Eric, KB0YDN, I decided to make this video discussing the incident of the Ham Firefighting Interference in Idaho Last year. Thi... Read more
“Let us understand what happens if you have a hill or mountain in the way of your radio signal because I recently published a video showing you... Read more
Remote Antenna Switch 2022 saw the return of the Dayton Hamvention and also celebrated the 70th anniversary of the world’s largest ham radio tra... Read more
DIAMOND VX-30 Peter Waters G3OJV, explains why the Diamond VX-30 could be the ideal antenna for those new to ham radio who would like to operate on th... Read more
Here we take a look at the RTL433 Plugin for SDR Sharp, making it easy to decode ISM RF Packets. https://github.com/marco402/plugin-Rtl433-for-SdrShar... Read more
IARUMS newsletter IARU Monitoring System (IARUMS) Region 1 newsletter reports an increase in unidentified intruders in the amateur radio bands followi... Read more
“I’m Jherica Goodgame, KI5HTA, and I’m a 2022 summer intern at ARRL HQ. Join me while I show you around some of my favorite parts of... Read more
“This video is a response to a video I saw by @NotaRubicon Productions where he claims that GMRS is better than Ham Radio. I found the video fun... Read more
RFI from Solar Inverter Lee, KI5ODH, built an off grid solar system for his station. But he is having some trouble. “The inverter is putting out... Read more
“Various terrain and Antennas: You can make the slope work to your advantage. I know your next question already. Hang on. I’ll make a vide... Read more
Solid State Amplifier Powerful: 1.5 kW typ. (+/- 0.5dB) Very Light: about 10 kgs (about 22 lbs). Very Small: H 12, W 28, D 36 cm. (4.72″ X 11.2... Read more
Here we take a look at the ADSB Exchange Deluxe Dual SDR Feeder Kit for an easy installation experience. Metal case holding a Pi 4B, and two SDRs... Read more
Xiegu GNR1 digital audio noise filter is an audio processing device integrating digital noise reduction and digital filtering. It will effectivel... Read more
SHF-P1 For more than half a century, Icom has created new technology for Amateur Radio. Our engineers have a new project, “Icom SHF Project – Super Hi... Read more
By Nick Sinanis, callsign SV3SJ, President of the International Amateur Radio Club (IARC), and Attila Matas, callsign OM1AM, Vice-president and Statio... Read more
Hamvention Icom PW2 Amplifier Take your contesting experience to the next level with the latest LDMOS power device with features supporting a SO2R ope... Read more
The Federal Communications Commission is proposing to fine an amateur radio operator for alleged interference with firefighting efforts in Idaho last... Read more
2022 saw the return of the Dayton Hamvention and also celebrated the 70th anniversary of the world’s largest ham radio trade show. Ham Radio Out... Read more
Thanks to Tristan and Jason for talking to me about the Eagle One Antenna. There seems to be some confusion about this antenna what it is and what it... Read more
New Hams Tips – What is the Noise Blanker used for? Read more
Stack Match is designed to stack, match and power split to one,two or three antennas or to split driving power into more PAs for the multibeaming.It w... Read more
Decibels (dB) can be slightly confusing. Here is a simple short video explaining. Callum. Read more
In this video, I’ll work Band-Countries (DXCC Challenge) #2,175 & #2,176! I demonstrate how to configure and use Ham Radio Deluxe HRD Alert... Read more
Icom Japan have been working on a concept of a new radio looking to revitalize the use of the SHF (Super High Frequency) bands. Recently a concept mod... Read more
Review of the features and operating controls of the FX-4C – a great little SDR Transceiver designed by BG2FX. Transmission frequency range: 3.5... Read more