[Elecraft] Receivers?
Phil Wheeler
w7ox at socal.rr.com
Sat Dec 12 03:18:43 EST 2015
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" <w7ox at socal.rr.com>
> To: elecraft at mailman.qth.net
> 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:elecraft-bounces at mailman.qth.net] On
>>> Behalf Of Scott
>>> Gillen ZL1CHM
>>> Sent: Friday, December 11, 2015 1:09 PM
>>> To: elecraft at mailman.qth.net
>>> 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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