Barry,
You said "Our Field Day operation uses all KX3s,
QRP ... ". Well that's a tad different than if
you have some 500 W stations nearby operating near
your frequency. And that is more typical of the
situation I described. So rather than disagree
you provided the exception that proves the rule :-)
And "the KX3 can handle any intelligently crowded
environment": Would that all our bands were
"intelligently crowded"!
73, Phil W7OX
On 12/11/15 3:49 PM, Barry LaZar wrote:
Phil,
I will take the given opportunity to
disagree. Our Field Day operation uses all KX3s,
QRP, That accounts for 3AB + a GOTA station.
There have been times when we found one of our
GOTA ops on the same band and in the same
portion of the band. What we have found is that
if the other radio is not in the same part of
the band, you may not even know he is there.
However, you know he's there. If he is far
enough away, you could work through him. There
is one caveat. We do have our antennas really
spread out. Our GOTA antenna(s) can be any where
from 200'-400' away depending on which of our
many antennas are being used at the time. And
secondly, all of our radios are using the 8 KHz
offset. I was amazed at the demonstration the
first time it happened. I would say that the KX3
can handle any intelligently crowed environment.
73,
Barry
K3NDM
------ Original Message ------
From: "Phil Wheeler" <[email protected]>
To: [email protected]
Sent: 12/11/2015 6:23:11 PM
Subject: Re: [Elecraft] Receivers?
Scott,
I agree with all that Ron says -- and have the
K2, K3 and KX3 .. and like them all.
Re "I am considering the KX3": The one caveat I
would add, and others can expand on (or
disagree with) this, is that if you operate in
a dense ham environment like Field Day or with
other nearby hams operating on the same bands
the direct-conversion KX3 will not be as good
as the two superhets because you may have more
difficulty hearing weaker signals with those
strong, nearby signals at adjacent frequencies.
In Auckland this may or may not be an issue for
you -- but as I recall 70% or so of New
Zealand's population is in the Auckland area.
73, Phil W7OX
On 12/11/15 1:40 PM, Ron D'Eau Claire wrote:
Scott, the three rigs use different design
formats:
The K3 and K2 and conventional superhetrodyne
formats with an Intermediate
Frequency in the H.F. range and crystal
filters to set the passband. The K2
has an adjustable crystal filter and the K3
uses fixed crystal filter
bandwidths. The basic K2 bandwidth is
established by the crystal filter
while the K3 adds an adjustable DSP filter
after the crystal filter. (The K2
has an optional audio DSP for enhanced
filtering.)
Although you will often see Elecraft rig
owners refer to "roofing filters"
the Elecraft rigs avoid them, using an I.F. in
the H.F. range instead that
avoids a lot of the compromises involved in
up-converting to a first I.F. in
the VHF range with a VHF "roofing filter" to
set the initial selectivity.
The KX3 is quite different. It is a
high-performance direct conversion
receiver using phasing to suppress the
unwanted sideband followed by
filtering of the resulting audio.
I'm a casual, mostly QRP operator who avoids
pile-ups (and so contests) and
enjoy all three. If I had to settle on one or
the other I'd probably take
the KX3 as my first choice because of its
small size, the "transparent"
sound of a direct conversion format and
options such as the PX3 panadapter.
My second choice would be my trusty and ever
dependable 15 year old K2
simply because I'm basically an "analog" sort
of guy. But I have no
complaints about the K3/K3S. I'm sure others
who enjoy busting "pileups"
will have more to offer about the advantages
of the K3/K3S.
For detailed test comparisons check out the
results published by Sherwood
Engineering on their web site:
http://www.sherweng.com/table.html
-----Original Message-----
From: Elecraft
[mailto:[email protected]] On
Behalf Of Scott
Gillen ZL1CHM
Sent: Friday, December 11, 2015 1:09 PM
To: [email protected]
Subject: [Elecraft] Receivers?
Can anyone compare the receivers in the KX3
versus K3 versus K2? Is there a
significant difference? I am considering the
KX3.
73
Scott
N0HOK / ZL1CHM
Auckland New Zealand
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