Navassa 5 Elements [ K7AGE ]

JK Navassa-5

2 Elements on 10M / 2 Element on 12M / 2 Elements on 15M / 2 Elements on 17M / 2 Elements on 20M / 12ft Boom

JK Antennas Navassa-5 Multi-Band Yagis interlace full-size 20, 17, 15, 12 and 10-meter elements on a single 12 ft. boom with a rugged 2 in. diameter. Named after the Navassa Island DXpedition, these antennas are based on a collaborative design effort by Daniel Horvat, E73M/N4EXA and JK Antennas.

JK’s unique design places full-size elements on a single boom and produces amazing 2-element mono-band performance on all 5 high bands! This results in producing good gain and great SWR bandwidth on all 5 bands. An optional 6-meter kit adds 2-more elements to make these antennas work on the 50 MHz Magic Band.

Mechanical details:

* Boom Length: 12 ft.
* Boom Diameter: 2.0 in.
* Wind Area: 8.97 Sq. ft.
* Maximum Wind Speed: 100 MPH
* Maximum Turning Radius: 19.45 ft.
* Longest Element: 36.8 ft.
* Element Construction: Stainless-steel through-bolts (no rivets or worm clamps)
* Mast size: Heavy duty U-Bolts supplied for 2 in. OD Masts
* Approximate Weight: 59 lbs.
* Power Handling: 5,000 watts (limited by balun selected)
* 1:1 Balun is required (not supplied)

These antennas have been designed to give the ham radio operator an excellent antenna for operation on all 5 high bands with automatic band switching and a single feed line. The short boom length was employed to keep the antenna compact and the installation simple. Navassa-5 antennas use direct 50-ohm coaxial feed with the all driven elements connected by a robust metal strap balanced transmission line. A high-quality 1:1 current balun is required. The COMTEK COM-BAL-11150DT is recommended for full power handling and best performance.

Like all JK Antennas, Navassa-5 beams are manufactured with high quality materials and hardware; like their larger low-band Yagis. A 1/4 in. (6mm) thick mast plate and all mounting hardware is included with these antennas.

When you think about working DX on the WARC and Classic High Bands using a high-performance Yagi, think about JK Antennas Navassa-5 Multi-Band Yagis.

10M	12M	15M	17M	20M	Optional 6M
Active Elements	2	2	2	2	2	2
Gain at 65ft above ground	12.56 dbi	12.4 dbi	11.79 dbi	11.82 dbi	11.39 dbi	12.44 dbi
Gain in Freespace	7.0 dBi	6.8 dBi	6.24 dBi	6.36 dBi	6.2 dBi	6.65 dBi
Peak F/B	12 dB	12 dB	12 dB	12 dB	12 dB	16 dB
Peak F/R	12 dB	12 dB	12 dB	12 dB	12 dB	16 dB
2:1 SWR Bandwidth	800 Khz	Less than 1.5:1	450KHz	Less than 1.5:1	Less than 1.5:1	800 KHz
1.5:1 SWR Bandwidth	600 KHz	100 KHz	350 KHz	100KHz	350KHz	600 KHz
Max Element Length	18.7 ft	19.8 ft	24 ft	28.2 ft	36.8 ft	9.4 ft

** All pricing shown assumes the basic mounting hardware. Additional costs may apply for customized mast plates and hardware.

** Pricing shown above includes Mast Plate and mounting hardware

Price : US$1,285.00 **

20

Use your Privileges Properly – Ham Radio

June 21, 2022 in: News No comments

Due to some inquiry by Eric, KB0YDN, I decided to make this video discussing the incident of the Ham Firefighting Interference in Idaho Last year. This video is to address the issue and remind fellow Ham’s about the rules and laws par... Read more

ISM Packet Decoder Plugin For SDR Sharp – RTL 433

June 17, 2022 No comments
Increase in unidentified intruders

June 17, 2022 No comments
I’m an Intern at ARRL Headquarters!

June 15, 2022 No comments
Antenna on Sloping Ground – What happens?

June 13, 2022 No comments

20

DIAMOND VX-30 Antenna Review

June 17, 2022 in: Antenna No comments

DIAMOND VX-30 Peter Waters G3OJV, explains why the Diamond VX-30 could be the ideal antenna for those new to ham radio who would like to operate on the VHF bands. The Diamond VX-30 is a 2m/70cm base station antenna with a frequency ran... Read more