InnovAntennas
An Excellent Dual Band Yagi for 70/144MHz on a 2.4m boom and single feed point
The 4-2-12 Dual Band Yagi has a total of 12 elements, 5 elements are used on 70MHz while 7 elements are used on 144MHz. The 4-2-12 InnovAntennas Dual Band Yagi stands aside from the crowd due to the methods used for it’s design. The 4-2-12 uses no traps or coils, no phasing arrangements and has no need for ‘compromise’ spacing between elements as the antenna has a set of correctly spaced elements for either band but still deploys only one feed point. An excellent antenna with great SWR bandwidth and performance in one package.
Performance
Gain on 70MHz: 9.78dBi @ 70.20MHz
F/B on 70MHz: 21.11dB @ 70.20MHz
Gain on 70MHz at 10m above Ground: 15.46dBi
Gain on 144MHz: 11.96dBi @ 144.300MHz
F/B on 144MHz: 19.02dB @ 144.300MHz
Gain on 144MHz at 10m above Ground: 17.82dBi
Power Rating: 3kw+
SWR 50MHz: Below 1:1.4 from 70.00MHz to 70.400MHz
SWR 70MHz: Below 1:1.5 from 144MHz to 144.800MHz
Boom Length: 2.4m
Weight: 6Kg / 12.2LB
Turning Radius: 2.396m
Wind Loading: 0.2 Square Metres
Wind Survival: 241KPH / 150MPH
Specification
This antenna is made with (10mm). The antenna has fully insulated elements which will ensure continuous, high performance for many years to come. Boom to mast brackets are included with all antennas which will support 2 inch (50mm) masts. Boom is 30mm square aluminum with 2mm wall thickness.
Our antennas are constructed with the best quality materials in order that the best mechanical construction can be achieved, not the cheapest and most profitable! Even a digital caliper is used (with an accuracy of .01mm) to measure the elements during production to ensure they are within 0.2mm of what they should be, ensuring they work as well as our software model predicts.
Note: Much development time has gone into our antennas, not just on basic electromagnetic design, we are able to model the effect of insulators, booms and other objects to ensure the make up of our antennas have least effect on performance and pattern degradation. More information can be found here
JIANPAI 8R Four Band LED Color Screen VHF/UHF Handheld Radio 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
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
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
From the Dayton Hamvention 2022, John Kruk talks to us about the differences between the FTM-200 and FTM-300 radios from Yaesu Read more
VHF
JIANPAI 8R Four Band LED Color Screen VHF/UHF Handheld Radio
Amateur/RNSS Coexistence – 23cm Band
World Debut of the SHF-P1, 2.4 GHz / 5.6 GHz Concept
The ULTIMATE Challenges Facing the Icom SHF Project
Yaesu FTM-200 vs FTM-300 at Dayton Hamvention 202
West Mountain Radio 2022 saw the return of the Dayton Hamvention and also celebrated the 70th anniversary of the world’s largest ham radio trad... Read more
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
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
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
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
Equipment
West Mountain Radio – Dayton Hamvention 2022
SDRplay SDRconnect demo at Friedrichshafen 2022
Building a Yaesu FT-891 remote control box
4 Way Remote Antenna Switch with WiFi
Expert Linear 1.5-FA Solid State Amplifier [ Hamvention ]
RX ANTENNA MINIWHIP MOVIL 100Khz- 30Mhz Price : 79,00 € More: Read more
“In this video I want to show you the 40M band UltraLight Magnetic Loop Antenna, how to setup it and testing in the real QRP conditions. During... Read more
Frequency: 7, 14, 21, 28 MHz Number of elements: 7 MHz – 3 el. 14 MHz – 4 el. 21 MHz – 4 el. 28 MHz – 6 el. Gain dBd: 5,8... Read more
Here we take a look at building a simple 20M Vertical Dipole purely from RG58 Coax. Read more
by David B. Murray, KD1BL Background: While taking the Level II Emergency Communications Course, my mentor, Ron Kane (AD6KV) presented information on... Read more
Antenna
RX ANTENNA MINIWHIP 100Khz- 30Mhz- HAMBUY
40M UltraLight QRP magnetic loop antenna + TEST [ XIEGU X5105 ]
Antenna Yagi 17 elements 4 bands – GPX Antennas
20M Vertical Dipole – Amazing Performance – T2LT Design
A Portable 75/40* Meter NVIS Antenna
Hello Operators. In this episode of the OH8STN ham radio, we are discussing replacing the raspberry pi field computer build, with the Microsoft Surfac... Read more
FT8 is a mode in the WSJT-X software developed by Dr Joe Taylor K1JT. In this video I show how to get started and make contacts with FT8, introduction... Read more
The WSJT-X development team has announced the general availability release of WSJT-X version 2.5.1. This release mainly contains i... Read more
Does WSJT-X display errors when you transmit with your radio? Try this simple fix which has helped me get rid of those frustrating errors. Read more
WSJT-X version 2.5.1 releasedThe development team have announced the General Availability (GA) release of WSJT-X version 2.5.1. This release mainly co... Read more
Digital Modes
The Ultimate Portable Ham Radio Computer
Get Started with FT8 – An Introduction for Beginners
WSJT-X Version 2.5.1 has been Released
WSJT-X Errors? Try This Simple Fix
WSJT-X version 2.5.1 released