Ian White, G3SEK wrote:
"Drawing gain curves is a fun activity...but don`t try to read too much
into them."

I searched on "yagi boom". I got many responses. One showed Ian as the
custodian of a computer program to design yagis. 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