I live in a place where there is a ham with a legal limit rig and a big
beam less than 1 km. away. Antennas are line of sight. His signal
renders about 10-20 kHz of the (CW) band unusable, with lesser effects
extending out farther. He does not have clicks; it is phase noise (or
something like that).
I have experimented with attenuators and they have NO effect on the
apparent width of his signal. Therefore I conclude that the problem is
not in my receiver (K3, not S, upgraded synthesizers).
I don't know what kind of transceiver he is using, but I think more
attention needs to be paid to transmitter cleanliness, rather than to
continue the race for dynamic range.
73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/
On 09/06/2021 4:57, Al Lorona wrote:
<snip>
Here's my opinion on ranking receivers by 2 kHz 3rd order dynamic
range: almost any modern receiver has enough dynamic range to make
this ranking more and more meaningless as time goes on. Sherwood
himself has said that 90 dB or above is plenty enough. To understand
why, see this post from 2016 by one of the old guys on this
reflector:
http://elecraft.365791.n2.nabble.com/K3-The-Way-We-Rank-Receivers-long-td7623639.html
Lastly, if you've been enjoying your rig for years and then hear
someone else complain about a flaw you weren't even aware of, don't
panic. There are a million reasons why his concerns might not involve
you in the least.
Above all, have fun.
Al W6LX/4
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