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
Icom has introduced a mobile mount for the IC-SAT100 Satellite PTT Radio. The new solution comprises of a heavy-duty BC-247 cradle, an HM-222 fist mic... Read more
Yaesu FT-710 YAESU is excited to announce a new HF/50MHz 100W SDR Transceiver – FT-710 AESS. The new FT-710 AESS is a compact design yet provides 100W... Read more
“The CQ WW Contest Committee conducted a survey of contesters from September 2 to 29, 2015. Invitations were sent to everyone who had submitted... Read more
Expert Electronics MB1 In this video I demonstrate how to update your Expert Electronics (SunSDR) MB1, for both software (ExpertSDR2) and firmware (as... Read more
Gordon West (WB6NOA) talks about HF mobile antennas, and getting the feed-point impedance at 50 Ohms. Also covered, is a recommendation on the type of... Read more
Get radio active! In this video, you’re guided STEP-BY-STEP by ARRL member Rob Zielfelder, Jr., N1NUG, to build an End-Fed Half-Wave Antenna Kit... Read more
FT8CALL “FT8, as we know, has dominated the airwaves for over a year now. Imagine the ability to have keyboard to keyboard ragchew, with... Read more
RFinder has worked with the DMR network Brandmeister to create new usability enhancements. The new dashboard just released includes coverage maps gene... Read more
Baofeng RD-5R “Today we talk about the Baofeng RD-5R Dual Band DMR HT. I found it to be a decent radio, but lacking the features that we have se... Read more
Recent Posts
New Vehicle Mounting Solution for the IC-SAT100 Satellite PTT Radio
Yaesu FT-710 -Features and Pre Order
2015 CQ WW Survey Results – part 1
Expert Electronics MB1 – Software and Firmware update
HF Mobile Antennas – Ham Nation
End-Fed Half-Wave Antenna Kit | Part One: BUILD
FT8CALL – The NEWEST HF Digital Mode, Introduction and Demo
RFinder – The World Wide Repeater Directory kicks BrandMeister up a notch. DMR without CodePlugs!
Baofeng RD-5R Dual Band DMR HT Review
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
![HAM-Toolbox [ APP ]](https://qrznow.com/wp-content/uploads/2022/10/hamclock-1200x997-1.webp)
![FT-710 [ Update Sherwood Table of Receiver Performance ]](https://qrznow.com/wp-content/uploads/2022/10/308890099_5564727106936426_8010060531805418258_n-90x60.jpg)
![FT-710 [ Update Sherwood Table of Receiver Performance ]](https://qrznow.com/wp-content/uploads/2022/10/308890099_5564727106936426_8010060531805418258_n-180x120.jpg)
![XIEGU G106 [ Video Review ]](https://qrznow.com/wp-content/uploads/2022/09/g106-90x60.jpg)
![XIEGU G106 [ Video Review ]](https://qrznow.com/wp-content/uploads/2022/09/g106-180x120.jpg)
