Archive of low Q VHF/UHF yagi designs
by Derek Hilleard G4CQM (2017)

23cm Band (1296MHz) - SCQM70UC...

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70 element SCQM70UC built by John Lemay G4ZTR
70 element SCQM70UC built by John Lemay G4ZTR

 

SCQM70UC is a follow on design from tried and tested SCQM60UC yagi built by GW4WND, ZL3RC, G4KCT and others...
Designing for 1296MHz is a significant challenge for a host of reasons including practical build constraints, this design was originally conceived as a 70cm yagi and then scaled within YO7-Pro to 23cm which in this case provided a successful/reliable outcome.

If you are interested in the challenge specialist parts can be obtained from Richard Mason G6HKS Yagi Kits & Parts.

 

SCQM70UC calibration seen in AOP
SCQM70UC calibration seen in AOP

 

E-Plane NEC2 calibrationH-Plane NEC2 calibration
E-Plane NEC2 calibrationH-Plane NEC2 calibration

 

E-PlaneH-Plane
E-PlaneH-Plane

 

Build dimensions - All elements 3/16 Inch OD rod
Table 1Table 2
Table 3Table 4

 



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