Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Drew Arnett]

To follow up.

Had a 20m cw station 3 elements 56 ft up.  I spent some time with the
GOTA station using my KX3 on 20m phone with 3 elements 30 ft up.
Preamp off, att off.  210 ft separation.

Could faintly hear the CW as broad background noise, but only
detectable, not strong or bothersome.  No thumping.  Could have been a
function of how clean/dirty the CW transmitter is than anything else.
So, in this situation, completely fine coexistence.

Yes, I'd still prefer a richer set of performance numbers from bench
measurement of both radios, but then it's like work instead of hobby.
:-)

Anyway, the GOTA operator who had never made a QSO before was tossed
into the deep end of the pool of trying to work SSB phone during the
madhouse that we call Field Day.  :-)  When he was done, he said he
wasn't a fan of the extreme challenge of FD contesting.  I told him he
should try any other day of the year.  And I'm sure he will.  Could be
he's really a CW op.  Maybe he'll find out.  Sitting with him and
coaching him through the patience and the 20 million subtleties, I was
impressed watching him bust through the pileups some of the loud
stations on 20 had going.  Got one by pausing before dropping call and
another by picking up on an out of rhythm cue.  When he was picked out
of the horde, the QSOs themselves were easy.

Best regards,

Drew
n7da

On Wed, Jun 2, 2021 at 2:23 AM Drew Arnett  wrote:
>
> Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
> Day?  How does the RX hold up with loud signals on other bands?  Plan
> to run external band pass filters of course.  The KX-3 is so great at
> everything else.  And it's great for single op HF contesting.  Just
> wondering if it will fold in a strong signal environment.
>
> Thanks and best regards,
>
> Drew
> n7da
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Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Jim Brown]

On 6/1/2021 8:02 PM, Paul GACEK via Elecraft wrote:

I had very little noticeable interference from one kx3 to the other.


It's the proximity of ANTENNAS that matters, NOT the radios. Here are 
slides for a talk I gave a couple of years ago at Visalia on all the 
issues that arise with multi-transmitter operation.

http://k9yc.com/Multi-Station.pdf

73, Jim K9YC


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Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Igor Sokolov]

Drew, KX3 is not the best radio for multi-multi environment. The radio 
automatically protects itself by switching preamp off if 59+20 signal 
appears on the band. With even stronger adjacent signal the radio 
engages attenuation. Blocking dynamic range of the radio is not for 
multi-multi. You would be much better off with several K3. They are 
probably still the best choice for this kind of operation both TX and RX 
wise.


73, Igor UA9CDC

02.06.2021 7:23, Drew Arnett пишет:

Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
Day?  How does the RX hold up with loud signals on other bands?  Plan
to run external band pass filters of course.  The KX-3 is so great at
everything else.  And it's great for single op HF contesting.  Just
wondering if it will fold in a strong signal environment.

Thanks and best regards,

Drew
n7da
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Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Paul GACEK via Elecraft]

Drew

I suspect the issue is not so much with the KX3 assuming smart deployment and 
separation but rather with the brand of your other station’s rigs.

As you already know, I was possibly with one of them and my biggest issue 
(using a K3s) was the CW “thumping” I heard.

When I built and ran my portable kx3 S02r station which ran both occasionally 
through a trixplexer, filters and into a HexBeam, I had very little noticeable 
interference from one kx3 to the other.

Paul

> On Jun 1, 2021, at 7:29 PM, Drew Arnett  wrote:
> 
> Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
> Day?  How does the RX hold up with loud signals on other bands?  Plan
> to run external band pass filters of course.  The KX-3 is so great at
> everything else.  And it's great for single op HF contesting.  Just
> wondering if it will fold in a strong signal environment.
> 
> Thanks and best regards,
> 
> Drew
> n7da
> __
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Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Walter Underwood]

Here are some KX3 tips from Wayne back in 2012.

http://elecraft.365791.n2.nabble.com/Field-Day-Operating-Tips-including-some-KX3-specific-td7557858.html
 


And to save you some typing, it is “KX3”, no need for a hyphen.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jun 1, 2021, at 7:23 PM, Drew Arnett  wrote:
> 
> Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
> Day?  How does the RX hold up with loud signals on other bands?  Plan
> to run external band pass filters of course.  The KX-3 is so great at
> everything else.  And it's great for single op HF contesting.  Just
> wondering if it will fold in a strong signal environment.
> 
> Thanks and best regards,
> 
> Drew
> n7da
> __
> Elecraft mailing list
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> Message delivered to wun...@wunderwood.org 

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[Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Drew Arnett]

Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
Day?  How does the RX hold up with loud signals on other bands?  Plan
to run external band pass filters of course.  The KX-3 is so great at
everything else.  And it's great for single op HF contesting.  Just
wondering if it will fold in a strong signal environment.

Thanks and best regards,

Drew
n7da
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