Hi,

Would someone be able to advise me how I would calculate new dimensions
to scale the 9-Element Yagi
(described at http://www.qsl.net/ve3cvg/antennas/900b/index.html)
down to say a 4 or 5 element version.

(ie. I would like the same physical construction method and frequency
but shorter boom length - around 350mm), around 7dBi gain would be fine

Thanks in advance

Regards

David