[TowerTalk] F12 Delta 240 performance observation

[SPWoo]

Hi John,

Thank you for the reply.  I haven't been able to confirm whether the beam has a 20db F/B at the resonant frequency.  If that is really true I would consider moving the resonant frequency to the SSB portion.  However based on several replies I received it seemed the F/B is not only frequency dependent but also angle dependent.  Perhaps the F/B would be better at lower angles, whereas at higher angles the antenna becomes more omni-directional.  In any case without further proof that there is a lot to be gained by moving the frequency I won't bother with it, yet.  It's a lot of work tuning a high Q antenna since the performance characteristics change with antenna height.  73.

 
Best Regards,
Jonathan Woo
(970) 646-1711
20dB F/B would be incredible for a short 2el 40m beam AT the resonant
frequency.  You should have adjusted your beam for a higher frequency if
you mostly use the phone band. John KK9A