Another was from the
Central States VHF Society and gives results of their 2004 gain
comparisons of many different antennas. Gain of these versus boom length
looks very ragged.

Best regards, Richard Harrison, KB5WZI



Gain vs. boom length makes sense only when comparing or tracking the same
antenna design i.e. Yagi with multiple elements. One can design lousy antenna
on a long boom.

Jim Lawson, W2PV was one who after some modeling showed that gain in the
properly designed antenna is roughly proportional to the boom length rather
than to number of elements. Some manufacturers "beefed up" their antennas by
sticking more elements on the same boom claiming better performance.

Yuri, K3BU.us

Yes but I believe that the early computorisationd he used was based first on
mechenical designed elements which were then imputted.He did not mess with
the element diameters after that.As an aside if you densly populated a boom
with elements many are put off by the low impedance being totaslly unaware
that an additional reflector an up the input impedance back again......
another example of what coupling can do for antennas
Art
"Yuri Blanarovich" wrote in message
...
Another was from the
Central States VHF Society and gives results of their 2004 gain
comparisons of many different antennas. Gain of these versus boom length
looks very ragged.

Best regards, Richard Harrison, KB5WZI



Gain vs. boom length makes sense only when comparing or tracking the same
antenna design i.e. Yagi with multiple elements. One can design lousy
antenna
on a long boom.

Jim Lawson, W2PV was one who after some modeling showed that gain in the
properly designed antenna is roughly proportional to the boom length
rather
than to number of elements. Some manufacturers "beefed up" their antennas
by
sticking more elements on the same boom claiming better performance.

Yuri, K3BU.us