[RFI] Noisy or Quiet Power Supplies?

[Howard Lester]

On Tue, Oct 19, 2010 at 8:24 PM, Michael Coslo  wrote:

>
>  Now for the real disadvantage of the doublet fed with ladder line. At
> say my setup, roughly 100 feet at a bit over 50 feet, 80 meters will act
> about like any antenna at that frequency/height. A fair amount of the
> power is going up. but you can still work just fine with it.
>
> 40 meters, and it works very well.
>
> Above 40 meters and the antenna pattern gets pretty squirrley, both via
> height and length/frequency. In some respects it's almost
> omnidirectional, but with some pretty deep nulls here and there. IMO,
> those nulls can be worse than the NVIS characteristics on 80 meters.
>
> Hi Michael,

I figure that, with my 140' antenna I am going to get some severe nulls on
the higher bands, but that should mean I'm also getting some strong lobes.
Whatever directions they're in is fine with me. Being a slightly inverted-V
with a 140 degree included angle, it may have a little more omnidirectional
characteristics than that of a straight dipole. In any case, I love it when
a European comes back to me in a contest on 20 or 15 m saying "Big signal!"
OK, I'm in New York, but still....  ;-)

Howard N7SO