The new 6-4-20 is a serious performer with an 11.1m computer optimised tapered boom and 10 elements on both 50MHz and 70MHz with a single feed point.
The 6-4-20 provides impressive performance on both bands with 14.46dBi free space gain on 70MHz and 13.41dBi free space gain on 50MHz. Placed 12m above average conductive ground, gain increases on 70MHz to over 20dBi and on 50MHz to almost 19dBi.
In addition, the 6-4-20 has been optimised for FT8 frequencies as well as the traditional operational areas of the band so as can be seen from the plots, SWR is flat through both bands os no amplifiers will have issues.
The previous longest dualbander for these bands was the 8-8-8- which has an 8m boom with 8 elements on each band sells well. The new dualbander has been in operation at OH5LK and EA5GF this summer with excellent results.
Want a monster on your tower for both 50MHz and 70MHz? There is just one place to look.
Photo below shows the 6-4-20 @ EA5GF nested between an HF Yagi and long-boom 2m Yagi.
Justin Johnson G0KSC
Antenna House, 20 Sanders Road,
Canvey Island, Essex SS8 9NY
Tel UK: +44 (0) 203 384 0072
George and Tommy, from Amateur Logic review the IC-7610 with Ray Novak from Icom. During their review they discuss the radio’s key features and... Read more
Kenwood TH-D74A 144/220/430 MHz TRIBANDER. Triband Amateur radio packed with convenient features and the advantage of a digital transceiver with D-STA... Read more
FLEX-6400M Radio Server SDR Features 100W PEP HF-6m operation All modes/all bands Integrated Remote Operation with Maestro, PC/ Laptop, iPad® or iPho... Read more
X-SERIES BTECH MOBILES The X-Series Mobiles introduce our new fully customizable Multi-Color LCD display screen. You can adjust the complete display t... Read more
MAIN FUNCTIONS 3072 Channels 1024 Contacts 255 Receiving Groups 250 Zones 16 Scan List Radio ID Radio TX Contacts Duan Band and Dual Display Radio Co... Read more
FCC Enforcement Advisory – Baofeng Update APRS Digipeaters and Wide1-1 path: 01:03 Buying Used Ham Radio Gear: 05:04 Update to the Illeg... Read more
The Array Solutions RATPAK System – Remote VHF Antenna Switch Features Six antennas to one feed line All Aluminum WX proof and RF proof construc... Read more
ICOM ID-51A-PLUS2 Handheld ICOM ID-51A-PLUS2 Handheld Transceivers offer global D-STAR connectivity! These dual band transceivers have a super-compa... Read more
Icom IC-M73PLUS PROFESSIONAL VHF MARINE TRANSCIEVER The IC-M73PLUS builds on many of the features that made the IC-M71 the choice of many marit... Read more
14-year-old Snehal Vagadia VU3WHO successfully received his first Slow Scan TV image from the International Space Station on Sunday, February 10. It w... Read more
Thomas Lindner, DL2RUM, is happy to announce the availability of version 3.5.2 of his RUMlogNG2Go logger for the iPhone and iPad. RUMlogNG2Go can be ... Read more
Yeasu 817 The 817 Companion app is dedicated to all the proud owners and users of the Yeasu 817 amateur radio. The Yeasu 817 is a fantastic radio bu... Read more
EchoLink for iOS version 2.6.14 is now available in the App Store. This is a 64-bit build that is fully compatible with iOS 10 and modern iOS devices.... Read more
FlexRadio Systems announces the release of SmartSDR for iOS v2.6.2 is now available for download or update from the Apple App Store. This App requires... Read more
Ham Radio App If you’re a member of ARRL, the national association for Amateur Radio, install this app and have QST, the ARRL membership journal... Read more
Station Genius can control: 4 Square Antenna Systems Antennas Antenna Switches Band Pass Filters Beam Stacks Beverages Rotators RS-232 Devices Station... Read more
Microprocessor-based data processing. A distinctive feature of the transceiver is the modern technology of processing data in DSP and output informati... Read more
Xiegu X108 QRP Transceiver Kit 9 Bands – AM – SSB – CW 1 – 20 watts The X-108 is a single-conversion transceiver for all ama... Read more
Yamaha CM500 Headset The Yamaha CM500 is a Circumaural headset that combines a pair of comfortable, noise-attenuating earcups and flexible headband wi... Read more
AnyTone AT-5555N GENERAL SPECIFICATIONS Frequency Coverage: 28.000 to 29.699 Mhz Antenna Impedance: 50 ohm, unbalanced Frequency Control: Digital Phas... Read more