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
The TS-990S comes equipped with dual receivers for simultaneous reception on different bands, it also features narrow-band roofing filters on the main... Read more
“This is the ultimate jewelry for your dream ham shack! The Geochron Digital 4k UHD gives viewers beautiful displays of the Earth with the sunri... Read more
DMR DSTAR FUSION “If you are considering trying out one of the digital voice modes but don’t know where to start, WATCH THIS VIDEO before... Read more
“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
IC-7300 Video Review IC 7300 Download´s Read more
Taken from Facebook from IZ7FLS Nico Hi everybody.. News from the South of the World.. As some of you surely remember, Pieter v51pj created a work gro... Read more
BaoFeng UV-82HP WHAT MAKES IT UNIQUE? * It has 3 Power Levels (1, 5, 7 watt) * VFO/ MR (Frequency Mode) can be locked via software * The Dual Push-to-... Read more
PROJECT: CROSS BAND REPEATER WITH 2 BTECH MOBILES Read more
Walk-through steps for manually programming the BaoFeng handheld radios. Easily program your BaoFeng for Repeater or Simplex Channels along with addin... Read more
“Don’t let the lack of a repeater keep you from playing with DMR or another digital mode. DMR repeaters are springing up everywhere. There are c... Read more
This program teaches you to receive Morse Machine code (CW). It starts with two letters and adds more when it sees that you are ready. This is the eas... Read more
WSPR WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Normal transmissions carry a station’s... Read more
Hold a mega-station in the palm of your hand. Wherever you are, you can work DX and log it. Operate from our 18 unique stations to snag a new country,... Read more
This app was developed to help HAMs during DX operation, cluster viewing and award tracking. Main Features: * Send alerts to user devices – Our backgr... 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
HPA-8000B-54 1kW Out Linear Amplifier 1.8 … 54 MHz Amateur Radio Bands 160 / 80 / 40 / 30 / 20 17 / 15 / 12 / 10 / 6 m All-Mode AM / FM / SSB /... Read more
Description The SS-30DV is designed to supply 25 Amps continuous (up to 5 minutes) and 30 Amps surge at 14.1 VDC. It is the perfect companion s... Read more
RigExpert AA-230 ZOOM – Antenna and Cable Analyzer 100 kHz to 230 MHz The analyzer is designed for measuring SWR (Standing Wave Ratio), Return... Read more
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
LA-1K 1 kw LDMS Solid state amplifier – coming soon! RF Sensing 1000 Watt Amplifier covering 160m to 6m bands with LCD touch-screen display to... Read more