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
http://www.alphaantenna.com The Alpha Loop http://chameleonantenna.com The CHA-P-Loop http://www.alexloop.com My Alex Loop Antenna http://www.elecraft... Read more
Authorities in Bahrain have notified the International Amateur Radio Union (IARU) that the Amateur Radio Association of Bahrain (ARAB) is not authoriz... Read more
“CW Morse (cwmorse.us) makes a variety of inexpensive, 3D-printed Morse code keys. They’ve now added paddles for iambic keyers to their li... Read more
The 2015 CQ World-Wide WPX Contest SSB: March 28-29, 2015 CW: May 30-31, 2015 Starts: 0000 UTC Saturday Ends: 2359 UTC Sunday Objective:For amateurs... Read more
14 MHz OWA yagi beam – MOMOBEAM MONO 5 20 is a fullsize antenna for the band of 20 meters (14 MHz OWA beam) designed for maximum performance. M... Read more
“Members of the Malaysian Amateur Radio Transmitters Society (MARTS) are supporting emergency communication in the wake of monsoon-season... Read more
In this show I introduce you to a simple 40 meter receiver kit. This receiver is highlighted on the cover of QST July 2016 magazine. It is sold by the... Read more
Motorola Solutions on March 29 announced that it had filed patent infringement complaints with the Regional Court of Düsseldorf, Germany, against Hyte... Read more
Recent Posts
Alex Loop vs CHA-P-Loop vs Alpha Loop Whats best for you? K6UDA Radio Episode 33
IARU Suspends Amateur Radio Association of Bahrain
Review of CW Morse Paddles with weighted base
The 2015 CQ World-Wide WPX Contest
MONO 5 20- is a fullsize antenna for the 5 el band of 20 meters
Amateur Radio Volunteers Supporting Emergency Communication Following Flooding in Malaysia and Thailand
K7AGE Builds The ZZRX-40 Receiver Kit
Motorola Solutions Expands Patent Infringement Complaints against Hytera
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
![The Icom IC-9700 manual is now available [ ENGLISH ]](https://qrznow.com/wp-content/uploads/2019/01/ic9700_manual-265x168.jpg)
