70 element 1296MHz yagi designed by G4CQM


1296MHz SCQM70UC AOWA...

SCQM70UC seen in 4nec2...
SCQM70UC seen in 4nec2

 

SCQM70UC built by G4ZTR...
SCQM70UC built by G4ZTR

There are very few modern 1296MHz yagi designs available to build, all the top ham yagi antenna designers have an empty portfolio when it comes to the SHF bands!

SCQM70UC is a Low Q Low Noise 50Ω Direct Feed yagi design by G4CQM. It has 70 elements in total and benefits from the use of a simple to build Split Dipole Driven Element. The design works very well with the G4CQM Coaxial Dipole implementation. Boom is only 4778mm in length (20.65λ)!...

This design was first created in K6STI's YO7 Professional then tuned and improved in AO Professional along with the free and powerful 4nec2 by Arie Voors!

Dimensions have been rounded to the nearest 0.5mm to aid ease of construction by the home constructor. Sincere thanks goes to John Lemay G4ZTR who has now built several SHF yagi designs by G4CQM...

A kit of parts for the home constructor can be obtained from Richard Mason G6HKS at PowAbeam Antennas...

Design was first created in K6STI's YO7 Professional
Design was first created in K6STI's YO7 Professional

 

SCQM70UC Gain and F/R
SCQM70UC Gain and F/R
SCQM70UC Impedance (R Vs X)
SCQM70UC Impedance (R Vs X)
SCQM70UC SWR
SCQM70UC SWR

SCQM70UC Q-factor

Horizontal PlaneVertical Plane
Horizontal PlaneVertical Plane

 

SCQM70UC in AGTC LITE
SCQM70UC in AGTC LITE

 

Construction images from John Lemay G4ZTR...

SCQM70UC built by G4ZTR...PowAbeam ParAclips designed by G4CQM...
SCQM70UC built by G4ZTRPowAbeam ParAclips designed by G4CQM
Elements cut and inserted into ParAclips...Mounting on the boom...
Elements cut and inserted into ParAclipsMounting on the boom
PTFE Driven Element Housing...Driven Element under construction!...
PTFE Driven Element HousingDriven Element under construction!

 

Antenna Files...

SCQM70UC.nec
SCQM70UC.YAG.txt
SCQM70UCGNU.xls

 



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