KOHJINSHA TOP > Versa

VERSA BEAMS is designed 100% in Japan with many well respected and active DXers as performance testers Mosta dvanced IT technologies were incorporated to achieve the most user-friendly operations from the shack-intensive field testing, including typhoon conditions were carried out for about 1 year and half prior to the offcial introduction of the VERSA BEAM. Precision manufacturing is incorporated to all mechanical parts, ensuring proper assembly. Top cover is designed with slant angle so that snow/ice could slip off easily. Hi-Q center loading coils are employed for the modeles covering 7MHz. The elements are about 30% shorter than the full size elements and operate without any inferiority to a full size antenna. This Hi-Q coil assures the VERSA BEAM work effciently even under RTTY operation. The center loading coil is by passed by a vacuum relay when oprated at 10MHz and higher. The contacts used are made of a special alloy that assures solid connections. The boom material is MIL standard aluminum with anti corrosion characteristic. Elements are secured by use of silicone rubber and durable plastic. The glass fiber poles are painted grey which helps to get more weeather resistance.

	■Each element has home position sensor so that the controller detects the home position to stop movement. Two separate reels driven by gear belts are used for elements. The reels are installed side by side which brings two major merit for VERSA antenna. One is that it reduces the floating capacitance between elements, and the other is elements move smoothly without stress.	■Models that can be used on 7MHz have Hi-Q loading coil reducing the physical length about 30% for the band. The 4mm OD copper coil makes you possible to operate heavily like RTTY contest operation.	■The contact made of special alloy without cadmium that efficiently pass the transmitting power to the element. For the antennas with 7MHz, Hi-Q coil vacuum relays are employed. VERSA antenna works as full size antenna 10MHz and above.
■The controller is designed user friendly, making for easy use. It has NORMAL, 180°, and DIPOLE modes. Because the SWR changes depending on its circumstances, element lengths are adjustable. You can fine tune the SWR at your location. KA-1 controller is equipped with a communication interface for most transceivers in today’s market. To protect your amplifier and VERSA antenna, the controller has a protection circuit that opens the TX Ground line between your amplifier and exciter while the elements are moving.	■The boom material is MIL standard aluminum, ensuring durability and corrosion resistance qualities. The plate that supports the elements is des igned for maximum durability. To ensure proper element position, silicon rubber and high strength plastic holders are incorporated without adverse effects on higher bands.	■The antenna element supports are high strength fiber glass and are secured in place by means of clamps. This greatly reduces the gravitational effects on the AEU. There are 2 models, depending on the radio frequency in use. One model is designed for 14MHz and above. This model is 5.2 meters long and is comprised of 3 sections with a weight of about 1 Kg. The 7MHz and higher model is 7.4 meters long and is comprised of 4 sections with a weight of about 2.3 Kg.	■Water proof connectors are preinstalled with the junction cable and the control cable, saving time and ensuring proper connectivity. Wiring size and type are designed for this application. The end user needs only to determine cable length required.
■Controller interface ・Power connector　　・CI-V（3.5mm monophonic）　　・Linear AMP（RCA)　　・PC⇔RIG（Toggle）　　・Transceiver（RCA）　　・USB（Type-B） ・Antenna Connection（Amphenol36P）　　・RC232C（D-sub9pin） ■Models confirmed working with VERSA BEAM [KOHJINSHA]　KL-1 / [KENWOOD]　TS-990,TS-590,TS2000、etc / [YAESU]　FTDX-9000,FTDX-5000,FT-2000、etc [ICOM]　IC7800,IC7700,IC-7600、etc [ELECRAFT]　K2,K3
■SMITH CHART KA1-406 at 14MHz	■SWR KA1-406 at 14MHz	■Balun characteristic chart
The above Smith Chart shows the KA1-406's 14MHz measurement by HP8752C. You see both impedance and reactance are within the best position.	The above KA1-406 SWR chart is measured at 14MHz. Measuredfrequency is fixed in above case:Note the SWR is below 1:1.5 with in the band. VERSA antenna elements (10MHz and above) move every 50 KHz and incorporate full length elements, allowing the SWR to remain below 1:1.5 at all points of the bands.	Both independent Balance-Unbalance (balun) and 9:4 impedance matching transformers are built utilizing properly matched Toroidal cores ensuring continuous duty cycle. Both characteristics are shown above. The upper display is the matching transformer and the bottom display is the balun. 7MHz through 50MHz the SWR is below 1:1.1 ensuring unwanted power loss from the coaxial cable.

Model	KA1-203	KA1-204	KA1-205	KA1-403S	KA1-432S	KA1-403	KA1-404	KA1-405	KA1-405S	KA1-406S
Gain/Size
Frequency Range	14/18/21/24/28/50MHz			7/10/14/18/21/24/28/50MHz
Element	3	4	5	3	3	3	4	5	5	6
Number of Elements for Each Band	3	4	5	7-10MHz 2 Elements	7MHz 2 Elements	7-10MHz DP	7-10MHz 2 Elements	7-10MHz 2 Elements	7-10MHz 3 Elements	7-10MHz 3 Elements
				14-50MHz 3 Elements	10-50MHz 3 Elements	14-50MHz 3 Elements	14-50MHz 4 Elements	14-50MHz 5 Elements	14-50MHz 4 Elements	14-50MHz 5 Elements
Power Rating	14-50MHz 5kW CW			7MHz 3kW SSB		7MHz 5kW SSB
				10MHz- 50MHz 3kW CW		10MHz-50MHz 5kW CW
Longest Element（m）	10.73			15.1
	Φ38			Φ45
Boom Length（m）	4.8	7.3	10.3	4.8	4.8	4.8	7.3	10.3	10.3	10.3
Turning　Radius（m）	5.82	6.41	7.33	7.89	7.89	7.57	8.34	7.94	9.07	9.07
Weight (kg）	31.6	42.4	62.4	42.4	47.42	36.7	52.6	72.7	77.9	85.8
Wind pressure area (�u)	0.76	1.01	1.27	0.96	1.05	0.86	1.21	1.46	1.56	1.81
Wind pressure area fit mast (mm)	Φ48〜Φ61		Φ60〜Φ77	Φ48〜Φ61				Φ60〜Φ77
Price	US$2,700	US$3,700	US$4,500	US$4,100	US$4,500	US$3,400	US$5,000	US$5,900	US$6,300	US$7,700
	Price is subject to change without notice.
For All Models (Antenna parts & Accessories)	All antenna parts
	Controller Adapter/1 Junction Box/ A set of cables to connect AEUs with Junction Box
	Tranceiver Interface/Antenna Protection Circuit / Assembly Manual/ Operation Manual

★ All types of KA1 have not only impedance matching transformer but BALUN with SO-239. 　★ Wind rating: 45m/S(100mph )

※ Designs and specifications are subject to change without notice as we develop and improve the performance of the antennas.	Option list and price list.