17m Antenna

This antenna is later removed and replaced by a 5 el yagi with 12m boom placed in the second tower.

image

image

The 4 element 17 m yagi is made of a CueDee 4 el 20m Yagi. The elements are of course shortened but the boom is extended to 9 m (29.5 ft). As the 17 m band is very narrow the antenna can be optimized for Gain and F/B. Mike SJ2W has made the final design.

Boom legth (diam 50/60 mm/ 2/2.5″) 9 m (29.5 ft)
Longest Element 7.49 m (24.5 ft)
Turning Radius
Weight
Forward Gain (free space) 7.3 dBd
F/B 23.2 dB

 

 

 

 

 

 

VNA plot when antenna was tested at 7m.

image

The gamma match is orginal CueDee just refurbished with new stainless steel screews.

 

image

MMANA plots with antenna at 20m (65 ft) without the gamma match.

image

image

image

 

 

 

image

HFTA plots looks resonable for all paths

image

image

image

image

image

FInal feeder 0.5 wave length of RG-213, Phase shift 179.99 degrees. Loss 0.23 dB

image