[Elecraft] Analog vs. Digital Front Ends
Guy Olinger K2AV
k2av.guy at gmail.com
Wed Sep 16 11:58:06 EDT 2015
In the late 60's W4BVV put a full size 3 el 40m yagi on a 70 foot boom up
150 feet. This would qualify as a passive front end. Pointed at Europe, at
the shack end of coax, peak to peak RF on a scope would measure five to ten
volts when the band was open.
What will today's direct samplers do with 10 volts RF in band on the
antenna terminal?
73, Guy K2AV
On Wednesday, September 16, 2015, Rick Stealey <rstealey at hotmail.com> wrote:
> Barry says:
> >During the past 3 years, I've worked one CQWW and one ARRLDX
> > contest from the Northeast with a SteppIR yagi feeding an ANAN-100D with
> > 0dB attenuation and never experienced overload during the weekends.
>
> And Joe presented a very useful tabulation showing how signals combine.
> One thing that we should keep in mind is that single band antennas like
> Steppirs, single band dipoles, etc. greatly attenuate out of band signals.
> And from Joe's data look what a difference 10-20 db can make. This might
> be a good case against 80/40 fan dipoles and trap tribanders.
> Rick K2XT
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