[Elecraft] K3 and whats next from Elecraft
Edward Dickinson III
softblue at windstream.net
Thu Aug 22 19:20:19 EDT 2013
I've recently been using an MFJ-1025 Noise Canceling Signal Enhancer. I'm
having a lot better success with than I did with a ANC-4, now produced by
Timewave. These units, along with a similar one from DX-Engineering, in
general work by having a 2nd antenna as a 'sense' antenna. The unwanted
noise is picked there and inverted in phase and mixed with the same noise as
received with the main antenna.
I credit most of my recent success over previous attempts to having a
bandscope. That factor is making all the difference in the world in terms
of usability. Rather than listening to a single frequency and attempting to
hear a null amongst perhaps all kinds of noise, one can observe changes and
adjustments across some bandwidth and directly observe the result of not
only 'background noise,' but birdies and odd frequency specific noises.
There are times when 40 meters would be inoperable for me because of line
noise. I am able to near completely remove that and don't have to deal with
distortion products.
It might be an interesting design project to create such a unit as an add-in
option for the K3.
73,
Dick - KA5KKT
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