3 element 27MHz OP-DES Yagi (2.2m)

A 3 element wideband 27-27.8MHz OP-DES (Opposing Phase Driven Element System) Yagi

The OP-DES is the newest in patent technology produced by InnovAntennas and is specifically designed for maximum performance, wide-band HF applications. Read more about the OP-DES Yagi Here. InnovAntennas use the latest in Electromagnetic Design Technology to ensure the very best results and the OP-DES Yagi is proof of that!

The OP-DES offers incredible wide-band performance with a flat SWR from 27-28MHz. No matching devices, coils or traps so ALL your power gets to the antenna and radiated !!

This antenna has a flat SWR curve covering 28-28.600MHz at 1.2:1 SWR.

Performance

Gain: 7.47dBi @ 27.500MHz

F/B: 13.44dB @ 27.500MHz

Peak Gain: 7.50dBi

Gain at 10m above Ground: 12.64dBi

Peak F/B: 14.23dB

Power Rating: 5kw

SWR: Below 1.2:1 from 27.000MHz to 28.00MHz  (Can be adjusted for 26.5MHz to 27.5MHz)

Stacking Distance: 5.0-6.5m ( 6.0m recommended)

2 Stacked Gain @ 6.0m spacing: 10.51dBi

2 Stacked F/B: 12.20dB

2 Stacked Gain @ 6.0m Spacing 10m above ground: 15.43dBi

Boom Length: 2.1m

Weight: 4.84Kg / 10.67LB

Turning Radius: 3.34m / 10.96ft

Wind Loading: 0.22 Square Metres / 2.37 Square feet

Wind Survival: 160KPH / 100MPH (125MPH version available upon request)

Other options available if higher wind loading/survival is required.

Specification

This antenna is made 5/8 inch (15.88mm) centre elements and 1/2 inch (12.7mm) outer elements with the OP-DES end sections 3/8 inch (9.525mm). The antenna has fully insulated elements which will ensure continuous, high performance for many years to come. Boom to mast brackets are included with all antennas which will support 2 inch (50mm) masts.  Boom is 1.5 inch square (38.1mm) 16SWG aluminum.

OTHER TAPER SCHEDULES ARE AVAILABLE FOR THIS ANTENNA, CALL OR EMAIL FOR DETAILS

Our antennas are constructed with the best quality materials in order the best mechanical construction can be achieved, not the cheapest and most profitable! Even a digital caliper is used (with an accuracy of .01mm) to measure the elements during production to ensure they are within 0.2mm of what they should be, this ensures they work as well as our software model predicts.

Note: Much development time has gone into our antennas, not just on basic electromagnetic design, we are able to model the effect of insulators, booms and other objects to ensure the make up of our antennas have least effect on performance and pattern degradation. More information can be found here

• Marine grade Stainless Steel Fittings
• Original Stauff Insulation clamps
• Mill finished boom and elements for highest levels of accuracy

Azimuth Plot

Elevation Plot

Single 3 element OP-DES up 10m above ground

2 x 3el OP-DES Yagi 5.5m apart with the bottom antenna 10m above ground

SWR

Manufactured the right way, not the cheapest way!