[TowerTalk] 1/4 wave vertical question

[Richard (Rick) Karlquist]

You forgot to mention that the full length on 40 is reduced
because the trap acts as a loading call.  IE, full length
will be less than 33 feet.  This also reduces the drive impedance
on 40 to less than 36 ohms.

Rick N6RK

David J. Sourdis - HK1A wrote:
> Tell me if I am wrong: The trap should be for 30m band, 10,1 MHz, not for 7MHzFrom the bottom of the vertical to the bottom of the 30m trap is around 1/4WL at 10.1 Mhz. NOT AT 7 MHz.At 7 MHz the RF is not trapped and uses the whole lenght of the antenna.
> 
> 
> 73
> 
> David  
> HK1A
> EC5KXA
> ex-HK1KXA