Here is a simple to make quagi for 70cm. We made ours for an uplink antenna for AO40, but you could use this quagi for other birds as well.

The instructions are fairly simple to follow. The cost for a quagi like this is about 60FMk ($12USD). To buy this type of yagi in a shop would set you back about $200 bucks easy.

Please send an email to (OH8GBP@ nospam sral.fi) and let him know if you like this antenna or not. He was the mechanical guru behind this light weight and neat design.

The Demensions are as follows.

Reflecter 71.12cm

Driver element 66,19875cm Directors start at 29.845cm to 28.051cm in 0.254 increments longest being closest to the driver element.

spacing is as follows.

from reflecter to driver 17.78cm--driver to d1 13.335cm--d1 to d2 27.94cm--d2 to d3 14.560--d3 to d4 22.1742--d4 to d5 22.1742--d5 to d6 22.1742

So I hope you enjoy this quagi. make sure to look here for other antenna ideas.

For construction we used 2.5cm PVC pipe and 2.5mm copper welding rods. We also used an N connecter for straight to the driver element to reduce any losses as much as possible.

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HUOM!!! Design hints

Remember when building at VHF or above, millimeters do matter. Dont waste your time with fractions of inches, measure it out to exactness with millimeters and youll get it right the first time.