Re: [Elecraft] [K3] Noise on wsjt-x waterfall

[Bill Frantz]

Jim, K9YC suggested some places to look that I hadn't thought 
of. When I turned off the "Flatten" option in the waterfall 
window, the noise bands went away. What I think is happening is 
that the algorithm in wsjt-x that flattens the response for the 
window sees the total lack of energy outside the K3's selected 
band and boosts the levels of the signals and noise near it as 
part of its compensation strategy.


73 Bill AE6JV

On 11/30/17 at 2:11 PM, fra...@pwpconsult.com (Bill Frantz) wrote:


I have a K3 which has been upgraded to have the Elecraft internal USB sound 
card.

I tried adjusting the DSP bandwidth when running FT8 to 
eliminate a strong signal above the FT8 subband and noticed 
that there was a strong noise bar on the water fall for about 
400 Hz below the high cutoff. Further playing with the controls 
showed a similar noise bar just above the low cutoff. Note that 
these noise bars are in the requested pass band.


Has anyone else observed this noise? Does anyone have an explanation?

73 Bill AE6JV


---
Bill Frantz| Truth and love must prevail  | Periwinkle
(408)356-8506  | over lies and hate.  | 16345 
Englewood Ave
www.pwpconsult.com |   - Vaclav Havel | Los Gatos, 
CA 95032


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Re: [Elecraft] Experience with KX2 indoors

[Bob Nielsen]

As I mentioned previously on this list, I operated WPX CW from 
northeastern France in 2004 with my 10 watt K2 (running 5  watts) and a 
W6MMA MP-1 mini-screwdriver antenna plus counterpoise from a 6th floor 
hotel room.  The antenna was sitting on a table near the window and I 
worked quite a bit of DX, including Tunisia and United Arab Emirates.  
Being the only entrant in the 20M QRP category, I naturally came in 
first place.  Prior to the contest I worked many additional stations 
including Aland Islands at 10 watts.  Of course, propagation was a bit 
better than is currently the case.


Caveat: This was the Elecraft version of that antenna (no longer 
available) which had the loading coil painted in Elecraft grey, which 
obviously added some additional mojo.


I'm planning on setting up the same antenna for use with my KX2 from my 
ground level apartment but don''t expect quite the same performance.


Bob Nielsen, N7XY


On 11/30/17 8:22 AM, Paulette Quick wrote:

What is the experience of operators with the KX2 indoors.  I am going to start 
using a KX2 with a W4OP antenna and I am concerned about getting out a signal.
Paulette WB9VHFMadison WI USA
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Re: [Elecraft] [KX3] KX2 max output now 12 watts (experimentaafield test l)

[Walter Underwood]

A similar change was released in KX3 firmware 2.38 on 1/3/2015. Max power was 
increased from 12 W to 15 W.

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

> On Nov 30, 2017, at 2:44 PM, Larry Reynolds lreyn...@verizon.net [KX3] 
>  wrote:
> All
> 
> Is there a similar  field test in latest firmware for the KX3?
> 
> Larry, K4MLA
> 
> 
> 
> #e lates1/30/2017 11:13 AM, Wayne Burdick n...@elecraft.com 
>  [KX3] wrote:
> 
>>  
>> The latest KX2 field-test firmware allows power output to be set as high as 
>> 12 watts on 80 through 20 meters. (Max out is still 10 watts on 17-10 
>> meters.) Supply voltage must be 12.8 V or higher on key-down. ~14 V supply 
>> recommended. 
>> 
>> Yes, this is only about 1 dB, but it did help me snag XF1IM this morning on 
>> 20 CW.
>> 
>> We consider the change experimental at this point. Not all KX2s are 
>> guaranteed to hit 12 W on all of these bands, and this level is recommended 
>> for low duty-cycle use, i.e. hunt/pounce.
>> 
>> If you’d like to give it a try, please email me directly.
>> 
>> 73,
>> Wayne
>> N6KR
>> 
>> 
> 
> 
> __._,_.___
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[Elecraft] QRPworks Sale

[Shel KF0UR]

Hi All,

 

It's time for our first sale at QRPworks.  From now until the end of
December 2017 we are offering...

 

- free shipping within the US

- $15 international shipping discount

- PLUS $10 discount on the SideKar and SideKar packages

- PLUS $9 discount on the Key Line Pi, our unique swivel paddle bracket.

 

73,

 

Shel KF0UR & Steve KB3SII

www.QRPworks.com

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[Elecraft] [K3] Noise on wsjt-x waterfall

[Bill Frantz]

I have a K3 which has been upgraded to have the Elecraft 
internal USB sound card.


I tried adjusting the DSP bandwidth when running FT8 to 
eliminate a strong signal above the FT8 subband and noticed that 
there was a strong noise bar on the water fall for about 400 Hz 
below the high cutoff. Further playing with the controls showed 
a similar noise bar just above the low cutoff. Note that these 
noise bars are in the requested pass band.


Has anyone else observed this noise? Does anyone have an explanation?

73 Bill AE6JV

---
Bill Frantz| There's nothing so clear as  | Periwinkle
(408)356-8506  | a design you haven't written | 16345 
Englewood Ave
www.pwpconsult.com | down.- Dean Tribble  | Los Gatos, 
CA 95032


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Re: [Elecraft] CW Contest and Elecraft K3s decoder

[Bob McGraw K4TAX]

Yes, I find this to be true as well.   I also suggest one tweak the TEXT 
DEC value to something other than AUTO.  In my experience a value of 3 
or 4 works well.


73

Bob, K4TAX


On 11/30/2017 3:45 PM, Bill Frantz wrote:
I get "reasonable" results. What I find is that the faster the sender, 
the better the decode. The ways I have found to improve decode are:


  Use CWT to exactly tune the signal.
  Use narrow bandwidth -- 250 Hz or less on the DSP filter
  Adjust the RF gain to minimize noise while still having signal.

I use CW 5--40 as my usual decoder setting.

73 Bill AE6JV



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Re: [Elecraft] CW Contest and Elecraft K3s decoder

[Bill Frantz]

I get "reasonable" results. What I find is that the faster the 
sender, the better the decode. The ways I have found to improve 
decode are:


  Use CWT to exactly tune the signal.
  Use narrow bandwidth -- 250 Hz or less on the DSP filter
  Adjust the RF gain to minimize noise while still having signal.

I use CW 5--40 as my usual decoder setting.

73 Bill AE6JV

On 11/27/17 at 3:46 AM, jstengrev...@comcast.net (John 
Stengrevics) wrote:


I too have never been able to get the CW decoder to work well.  
It only works if signals are super strong - precisely when I 
don’t need it.


Anybody have any suggestions?


---
Bill Frantz|Security, like correctness, is| Periwinkle
(408)356-8506  |not an add-on feature. - Attr-| 16345 
Englewood Ave
www.pwpconsult.com |ibuted to Andrew Tanenbaum| Los Gatos, 
CA 95032


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Re: [Elecraft] KX2 max output now 12 watts (experimental)

[George]

Wayne   

Please send file for the KX2 as I would like to try.

Thanks 73

George wb5xx

Sent from Mail for Windows 10

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Re: [Elecraft] Experience with KX2 indoors

[Steve Sergeant]

I often use the KX2 indoors with one of two temporary antennas:

1) A 3.9, 7.2, and 14.3_MHz 76' trapped and coil-shortened center-fed
inverted-V (dipole) with a SOTAbeams 1:1/15W  balun, pitched on a 10m
MFJ "fishing pole", and terminated on some 6' wooden fence posts. This
connects to my shack using a 75' length of RG58.

2) A 36' helical-wrapped vertical wire on that same "fishing pole", five
random non-resonant radials varied between 12' and 33' long at 6 to 12
inches above the ground, and a SOTAbeams 4:1/15W balun. I use this on
7.0 through 29.7_MHz. This connects to my shack using a 35' length of RG-8x.

With this setup I have worked 47 states and 3 Canadian provinces on
JT65, and 8 states on SSB. I regularly check-in to a couple of
multi-state public service nets on 75m as well.

I also carry those same two antennas into the field for camping trips,
but instead of RG58 or RG8x, I carry a 60' piece of RG174. Around the
time of the recent solar eclipse, I made about 20 contacts in 3 hours
from my campsite in Idaho outside Yellowstone N.P. with stations from
the west coast all of the way to the Great Lakes region on 80m and 20m.

When I used the KX2 with a Chameleon "P Loop" I was underwhelmed with
the results.

Steve, KC6ZKT, San Jose (CM97)


On 11/30/17 8:22 AM, Paulette Quick wrote:
> What is the experience of operators with the KX2 indoors.  I am going to 
> start using a KX2 with a W4OP antenna and I am concerned about getting out a 
> signal.
> Paulette WB9VHFMadison WI USA
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Re: [Elecraft] KX2 max output now 12 watts (experimental)

[Chris Tate - N6WM]

Wayne I will load it on my KX2 and test..  

From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on 
behalf of Wayne Burdick [n...@elecraft.com]
Sent: Thursday, November 30, 2017 8:13 AM
To: Elecraft Reflector
Cc: k...@yahoogroups.com; QRP-L; HF Pack Pack
Subject: [Elecraft] KX2 max output now 12 watts (experimental)

The latest KX2 field-test firmware allows power output to be set as high as 12 
watts on 80 through 20 meters. (Max out is still 10 watts on 17-10 meters.) 
Supply voltage must be 12.8 V or higher on key-down. ~14 V supply recommended.

Yes, this is only about 1 dB, but it did help me snag XF1IM this morning on 20 
CW.

We consider the change experimental at this point. Not all KX2s are guaranteed 
to hit 12 W on all of these bands, and this level is recommended for low 
duty-cycle use, i.e. hunt/pounce.

If you’d like to give it a try, please email me directly.

73,
Wayne
N6KR


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[Elecraft] Experience with KX2 indoors

[w4sc]

I have a W4OP 40-10 meter end-fed mounted in the peak of the attic of my single 
story home.

I managed to work VP6DX (Elecraft sponsored) a few years back with a 10W K3 on 
40M SSB (two times, early mornings local) as no one else seemed awake to call.  
Also into Europe since on 40, 20 and 17.

More recently with a 10W KX2 I have managed to work into KH6, W6, Europe, 
Caribbean, and South America using CW and SSB, again on 40 mostly. 

You just need to “pick your battles”, as you will (probably) not crack large, 
alligator pileups.  Band conditions and timing is everything

Have fun!!

73 de Ben W4SC
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Re: [Elecraft] USB Charger from KX3 Battery

[Don Sanders]

Lots of info on Google and Amazon has 5 pieces for about $6, free shipping

Dr. Don W4BWS

On Thu, Nov 30, 2017 at 12:24 PM, K9MA  wrote:

> I'm planning to take the KX2 on a long trip, and it occurred to me that it
> might be useful to be able to charge my phone from its battery.  I just
> took apart a cheap automobile charger and wired a socket to its input.  It
> works down to about 8 V.  You could build your own, but at $3 it's hard to
> beat.  If weight weren't an issue, you could just make an adapter from the
> battery plug to a cigarette lighter socket.
>
> If you really want to build your own, look at the data sheet for the
> MC34063A.
>
> 73,
>
> Scott K9MA
>
> --
> Scott  K9MA
>
> k...@sdellington.us
>
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[Elecraft] USB Charger from KX3 Battery

[K9MA]

I'm planning to take the KX2 on a long trip, and it occurred to me that 
it might be useful to be able to charge my phone from its battery.  I 
just took apart a cheap automobile charger and wired a socket to its 
input.  It works down to about 8 V.  You could build your own, but at $3 
it's hard to beat.  If weight weren't an issue, you could just make an 
adapter from the battery plug to a cigarette lighter socket.


If you really want to build your own, look at the data sheet for the 
MC34063A.


73,

Scott K9MA

--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] Experience with KX2 indoors

[Don Wilhelm]

Paulette,

As with any antenna, if you can get it outdoors and in the clear, your 
noise pickup will be drastically reduced compared to using it indoors.


Although when mounted outdoors, the manual tuning may make it difficult 
to tune from the KX2 location - so put on a short length of coax, and 
carry the KX2 to the antenna location for tuning.  After tuning, connect 
a coax extension onto the antenna, and go into the shack for operating.


73,
Don W3FPR

On 11/30/2017 11:22 AM, Paulette Quick wrote:

What is the experience of operators with the KX2 indoors.  I am going to start 
using a KX2 with a W4OP antenna and I am concerned about getting out a signal.

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[Elecraft] Experience with KX2 indoors

[Paulette Quick]

What is the experience of operators with the KX2 indoors.  I am going to start 
using a KX2 with a W4OP antenna and I am concerned about getting out a signal.
Paulette WB9VHFMadison WI USA
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[Elecraft] KX2 max output now 12 watts (experimental)

[Wayne Burdick]

The latest KX2 field-test firmware allows power output to be set as high as 12 
watts on 80 through 20 meters. (Max out is still 10 watts on 17-10 meters.) 
Supply voltage must be 12.8 V or higher on key-down. ~14 V supply recommended. 

Yes, this is only about 1 dB, but it did help me snag XF1IM this morning on 20 
CW.

We consider the change experimental at this point. Not all KX2s are guaranteed 
to hit 12 W on all of these bands, and this level is recommended for low 
duty-cycle use, i.e. hunt/pounce.

If you’d like to give it a try, please email me directly.

73,
Wayne
N6KR


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[Elecraft] K3 PRE function question

[Randy Lake]

This is a pretty simple question regarding the K3 PREamp (not PR6). If I do
not have the PR6 does the PRE on the front panel help with RX on 6m/2m (int
module) or does it merely increase noise?
Thanks

-- 
Randy Lake N1KWF
73 Gunn Rd.
Keene,NH
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