Hello Brendan,
I have two ten meter 5 el yagi antenna arrays that are just under 300 ft
apart. One is on a 70 ft tower and consists of three yagis. The other is a
single yagi at 30 ft. If the two yagis are boresighted on each other, I see
only 17 dB of attenuation between them. I checked the isolation with a
signal generator and a crystal detector with an HP 415E meter. This can blow
out a front end even running 100 watts. Each yagi has almost 9 dBd gain in
free space. I guess it depends on what ur antenna is, but yagis on the
higher bands can cause problems when aimed at each other. I did fry one K3
using an amp with this setup. I took out a diode.
Be careful, and make a few checks to avoid surprises.
Dave K1WHS
----- Original Message -----
From: "Jim Brown" <[email protected]>
To: <[email protected]>
Sent: Wednesday, January 20, 2016 12:30 AM
Subject: Re: [Elecraft] Nearby Ham Interference
On Tue,1/19/2016 3:05 PM, Ian wrote:
Consider one of these:http://www.dxengineering.com/parts/dxe-rg5000hd
The K3 is pretty well protected -- if, for example, you hit it with too
much signal, the attenuator will kick in and the preamp will turn off. And
if that doesn't reduce the signal enough, you'll get a HIGH SIGNAL warning
on your display. In addition to that, there's a diode on the front end.
I'd verify that an RX is getting overloaded before spending dollars on
this product. With antennas 300 ft apart, it's unlikely that you're going
blow anything up unless the other station is running an amp.
73, Jim K9YC
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