“The Quad Antenna uses a single, central-fed frame with a feeder-line. Therefore you must use an ATU for operating this antenna. Excellent would be a “Z-Match”, a 1-KW-Tuner will be described on another page.
The reflector has one loop for each band, self-resonant without stubs.
The first DK7ZB-Quad was introduced in 1995 and contented a mistake and had not the best performance. In 2000 the Quad was optimized for 1-Lambda reflector loops with “EZNEC” by W7EL.
See all details:
Recent Posts
ANTENNA LAUNCHER – THE AIR BOSS DEMONSTRATION
The AIR BOSS antenna launcher was designed to launch a light fishing line over trees in order to create temporary antenna for ham radio operators. Sin... Read more
Coaxial cable quality review
Coaxial cable quality review – Read full Article: Read more
Release: WSJT-X Version 1.9.0-rc4
Changes from WSJT-X Version 1.9.0-rc3 include the following: – Corrected a number of flaws in Fox and Hound behavior, FT8 DXpedition Mode... Read more
China Plans Lunar-Orbiting Amateur Radio Satellites
China’s Harbin Institute of Technology is developing a pair of lunar-orbiting satellites — DSLWP-A1 and A2. According to Mingchuan Wei, BG2BHC, DSLWP... Read more
Ofcom requests destruction of RSGB Callbook 2017
The UK communications regulator Ofcom has admitted it released radio amateurs‘ private home address instead of their mailing address This inform... Read more
The March Issue of Digital QST is Available
March QST is our annual antenna issue and it is available now. • Try an easy two-band HF ground plane antenna • Create an effective HF apartm... Read more
JUENTAI JT-K10A VHF/UHF 10 Watts
JUENTAI JT-K10A JUENTAI JT-K10AT Function: 01. Outpower: 10W 02. Adopting newest polymer Li-ion battery 03. Adopting imported PC material in case t... Read more
![Ham Radio 360: Shopping Show v3.0 [ Podcast ]](https://qrznow.com/wp-content/uploads/2016/11/100_4135-265x168.jpg)
Ham Radio 360: Shopping Show v3.0 [ Podcast ]
“It’s that time of year again! With Black Friday in sight and our mailboxes full of catalogs, it’s time to talk Ham Radio Shopping! George and... Read more
The ARRL Library Goes Live!
“After several months of planning, The ARRL Library is now live! The online Library is a free repository of educational presentations and... Read more
Icom IC-7610 Real Time FT8 Diversity Reception
“Jarrad VK3BL demonstrates how to use Dual Watch and 2 instances of WSJT-X (the primary can TX as we will show in another video) to achieve a fo... Read more
ME3000-V 2m EME – VHF Amplifier ( 3KW – 144MHz )
VHF Amplifier Frequency Coverage: 144-146MHz amateur band. extensions and/or changes on request. • Power Output: 3000 W CW/SSB • Intermodu... Read more
Amateur Radio Volunteers Support 2017 Boston Marathon
Nearly 280 Amateur Radio communication volunteers on April 17 participated the 2017 Boston Marathon, the 121st running of the event organized by the B... Read more
UN Headquarters’ 4U1UN Making Slow but Steady Progress in Returning to Air
Responding to inquiries noting the lack of 4U1UN activity, the United Nations Amateur Radio Club (UNARC) indicated on its Facebook page this week that... Read more
![YAESU FTDX10 [ VIDEO ]](https://qrznow.com/wp-content/uploads/2020/12/127933142_1316110978725336_3068618992769129607_n-90x60.jpg)
![YAESU FTDX10 [ VIDEO ]](https://qrznow.com/wp-content/uploads/2020/12/127933142_1316110978725336_3068618992769129607_n-180x120.jpg)
