COMTEK ACB-4 Hybrid Four-Square Systems are phased array Relay Units and Control Consoles that are affordable, simple to install, and easy to use. A phased array consists of two or more elements fed in phase relationships and power ratios that produce a directional pattern. Four-square arrays offer over 5 dB of forward gain and fantastic front-to-back rejection over 25 dB! Ground-mounted vertical arrays are easier to build and less costly to maintain than towers and beam antennas. Four-Square arrays are a practical solution for building a high performance directional HF antenna system, especially for Low Band DXing. Click the Instructions link for more information on COMTEK ACB-4 Hybrid Four-Square Systems.
COMTEK ACB-4 Hybrid Four-Square Systems can be used with two elements for two directions, but are designed for use with a four element vertical arrays for an excellent cardioid pattern with four selectable directions. COMTEK ACB-4 Hybrid Four-Square Relay Units are single-band, available for each major Amateur band from 160 meters to 10 meters. Four-Square arrays are band-specific, due to antenna spacing and phasing feedline lengths.
DX Engineering also offers our newly designed, upgraded Hybrid system called the “Transmit Four Square” or TFS4 series. Hams around the world are enjoying the addition of an Omni-directional position, hot-switching lockout for amp keying, better relays and components for 5kW capability, push-button directional switching and more with the DX Engineering TFS4 series.
DX Engineering offers a full line of cables, antennas and accessories for your phased array installation.
The original COMTEK ACB-4 Hybrid Four-Square Systems now include new COMTEK ACB-4A Four-Square Control Consoles. Specially designed to be useful as replacements for existing COMTEK ACB Hybrid four-square antenna systems, ACB-4A consoles now feature a 12 Vdc input to be easily integrated into all stations, including those that can be run on 12 Vdc emergency power. They have four scratch pad labels and LEDs to indicate the array directional positions. COMTEK ACB-4A Four-Square Control Consoles are ready to control your COMTEK Hybrid Array with your low-cost three conductor control cable.
COMTEK ACB-4 Hybrid Four-Square Systems include the 90 Degree Hybrid Relay Units with these features:
* 2 kW rating for Amateur SSB and CW
* 15 amp gold plated contact relays with dust covers
* PTFE silver stranded wire over fiberglass tape-wound toroids
* Balanced temperature, frequency, and voltage stable capacitors
* Double-sided printed circuit board
* MOVs for lightning surge protection with RF bypass caps
* Brushed aluminum Z-chassis and cover with riveted seams
* Mounting clamp included
ON-LINE LOSS & POWER CALCULATOR MOBILE DEVICE VERSION Read more
Designed for Weak Signal, Tropo Scatter, Meteor Scatter, Digital, & Contest Operation! The BEKO HLV-1250 is a special 25th Anniversary Amplifier c... Read more
The QTH Locator App was developed for HAM Radio use. This is the extended version of “Maidenhead Grid Locator” using Google Maps to show a... Read more
The world’s longest-lived satellite, AO-7, turned 45 years old this month. It was launched on November 15, 1974, from Vandenberg Air Force Base in Cal... Read more
“The ARRL is inviting nominations for the Hiram Percy Maxim Award, the League’s premier award honoring a young Amateur Radio licensee. The ARRL... Read more
“FT8 is the newest weak-signal mode from Joe Taylor, K1JT, and friends. It operates very much like JT65 but is four times faster and more automa... Read more
JH1CBX Masaco introduces AH-705 designed for IC-705. Descriptions ・Covers the 1.8 MHz to 50 MHz bands 30 m, 98.4 ft or longer antenna: 1.8 – 54 MHz, 7... Read more
ARRL CEO Tom Gallagher, NY2RF, talks about FirstNet, a broadband network for first responders, and a potential role for Amateur Radio operators.... Read more
See More: link Read more
Carbon Fiber Masts from Gigaparts for your Ham Radio Antenna – these masts come in 3 different sizes, this one being the 50′ version. This... Read more
Recent Posts
Coax Cable Loss – Ham Radio Basics
BEKO HLV-1250 2 Meter RF Power Amplifier with 1,250 Watts RF output
QTH Locator Droid – Mobile App
Happy 45th Birthday, AMSAT-OSCAR 7!
ARRL Solicits Nominations for Six Awards
Everybody’s Trying the New FT8!
Introduction for Icom AH-705 Automatic Antenna Tuner
FirstNet and Amateur Radio : ARRL 60-Second Century:
Grounding Tips – DX Engineerings Q&A Wednesday – Part 1
Carbon Fiber Mast for Ham Radio Antennas
Warning: file_get_contents(https://plusone.google.com/_/+1/fastbutton?url=https%3A%2F%2Fqrznow.com%2Fcomtek-acb-4-hybrid-four-square-systems%2F): failed to open stream: HTTP request failed! HTTP/1.0 404 Not Found in /home/qrznow/public_html/wp-content/themes/goodnews5/framework/functions/posts_share.php on line 151
