[Elecraft] Receivers?

Fri Dec 11 19:25:40 EST 2015

Dave,
     You are so correct. I didn't re-read what I wrote after I did a few 
edits.

     This is what I was trying to say.  If another station is on the same 
band,  you may not know he is there if he is operating in another 
portion of the band. However, if he is in the same portion and far 
enough away, you will know he is there, but you may be able work through 
him. Hopefully, this reads better. But, remember I said we keep our 
antennas as far apart as we can and we operate QRP.

73,
Barry
K3NDM

------ Original Message ------
From: "dave" <ho13dave at gmail.com>
To: "Barry LaZar" <k3ndm at comcast.net>
Sent: 12/11/2015 7:10:54 PM
Subject: Re: [Elecraft] Receivers?

>Barry,
>
>Re-read your note carefully. It doesn't make sense. You first say you 
>will not know he is there, then you say you will know he is there but 
>you can work through him? What does that mean?
>
>73 de dave
>ab9ca/4
>
>
>
>On 12/11/15 5:49 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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>>
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