Re: [Elecraft] K3 w/ Steppir

[Mike K2MK]

Hi Fred,

Yes the Elecraft Key line interrupter and either the SteppIR built-in tuning
relay or the N8LP external tuning relay are critically needed with any
SteppIR antenna. 

73,
Mike K2MK



Cady, Fred wrote
> I don't have a stepper but you might need to have a key line interrupter
> so you don't key the KPA500 while the stepper is tuning.
> 
> -Original Message-
> From: Elecraft [mailto:

> elecraft-bounces@.qth

> ] On Behalf Of pkhjr via Elecraft
> Sent: Friday, November 14, 2014 3:44 PM
> To: 

> elecraft@.qth

> Subject: [Elecraft] K3 w/ Steppir
> 
> Want my steppir to track my K3, is the Y cable from steppir all I need?  I
> have the KPA500, P3 and KAT500 if that makes any difference.  Just got my
> steppir up last week..WOW.
> 
> Thanks
> 
> 73 Tex
> ka5y





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Re: [Elecraft] [K3] N3fjp rig control problem

[Kyle N4NSS via Elecraft]

Gene,Here are the settings for ACLog:Baud Rate: 38.4
Parity: NONE
Data Bits: 8
Stop Bits 2
Connection: RTS
Mode Determined by: RIG
Radio Polling: 2 secThese setting works for me.
73---
Kyle N4NSS
Enjoy the Magic of HF Radio
It's just not a hobby, it's an adventure.
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[Elecraft] K2 + Field Day

[aj4tf]

Looks like our small, insignificant, High Point (North Carolina) Amateur
Radio Club (W4UA) made the top 20 in our category.
A few guys, a few radios, including K2 #7006, and a few pieces of wire are
#13 in the 3A Commercial category.   

73, de AJ4TF



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[Elecraft] K1 Power Out flaky

[w1dwz w1dwz]

I am an  ELECRAFT Newbie. Just finished  a K! and it works great  out
of the box. I am slowly learning the operating stunts with the TAP  /
HOLD   feature .
One little glitch . To set  the output power  , it sets properly , say at
4.0 Watts,   with the   WPM  +/-   buttons  ,  but after a few seconds
it dribbles around and goes down to   0.5 Watts or whatever Tweaked the
cans on the Filter Board  but still NG  .Wonder if others have
experienced this anomaly.   Dave   W1DWZ  RI
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[Elecraft] For Sale LP-PAN + EMU0202 sound card for Panadapter

[Wim Dewilder via Elecraft]

For sale LP-PAN and EMU-0202 USB soundcard as a package for use with K3 as a 
panadapter.
The LP-PAN has the build-in I.F. amplifier and is setup for the K3.
Sale is as-is no returns but units worked great when packaged no issues at all. 
I used
it with Power SDR and NAP3 panadapter software.
Comes with all needed cables (power, audio, USB, I.F.)
My price: $250 shipped via priority mail to CONUS ONLY. Sorry no international 
orders. 
Paypal preferred (only to a confirmed Paypal address).
You can see the panadapter at work on my QRZ page, my address and email are ok 
on QRZ.com
It's posted on QRZLP-PAN for K3 and EMU0202 USB soundcard

|   |
|   |  |   |   |   |   |   |
| LP-PAN for K3 and EMU0202 USB soundcardFor sale LP-PAN and EMU-0202 USB 
soundcard as a package for use with K3 as a panadapter. The LP-PAN has the 
build-in I.F. amplifier and is setup for the K3. Sale... |
|  |
| View on forums.qrz.com | Preview by Yahoo |
|  |
|   |

73 de K6TE Wim

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Re: [Elecraft] [NCCC] K3 Remote - Losing rx audio on Focus swap & other operations

[iain macdonnell - N6ML]

[BCCing cross-posted lists]

On Fri, Nov 14, 2014 at 9:49 PM, Rick Tavan N6XI  wrote:
> Need some help with a memory jog here: I'm running a K3 with N1MM Logger
> Plus in SO2V mode and a YCCC SO2R Box. When I change TX focus between VFO A
> and B, the K3 audio disappears until I jog the gain control. Then it comes
> back. Other operations like closing certain menus also blank the audio. I've
> heard about this problem and suffered it occasionally, sporadically, but
> don't recall the cause. Two weeks ago in SS CW it didn't happen at all. But
> I've been doing lots of configuration work and now it's persistent, happens
> every time. Any thoughts on how to fix it?

When at the remote site, set the RF and AF gain controls to your most
commonly-used positions. There are various events that cause the
remote K3 to reset the gain levels to whatever those pots are
physically set to - notably turning on or off the sub-receiver. It's
rather annoying when trying to work a weak DXpedition running split on
SSB, and I/we need to bug Wayne about this again :)

73,

~iain / N6ML
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[Elecraft] For Sale LP-PAN + EMU0202 sound card for Panadapter

[Wim Dewilder via Elecraft]

The LP PAN and EMU have been sold, thanks Alan
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Re: [Elecraft] K1 Power Out flaky

[Don Wilhelm]

Dave,

That sounds like the behavior of an unsoldered or poorly soldered 
connection that is heating when you transmit.  I don't know where to 
tell you to start looking, but if you want to shorten the search, you 
might be able to tell something from the Transmit Signal Tracing steps 
in the back of the manual.  It has a chance of leading you to the 
failing stage and then you can examine that stage in detail.


Alternately, you can reflow the soldering over the entire RF Board with 
a hot (750 degF) iron and dwell on each connection long enough to watch 
the solder melt and flow.


73,
Don W3FPR

On 11/15/2014 11:02 AM, w1dwz w1dwz wrote:

I am an  ELECRAFT Newbie. Just finished  a K! and it works great  out
of the box. I am slowly learning the operating stunts with the TAP  /
HOLD   feature .
One little glitch . To set  the output power  , it sets properly , say at
4.0 Watts,   with the   WPM  +/-   buttons  ,  but after a few seconds
it dribbles around and goes down to   0.5 Watts or whatever Tweaked the
cans on the Filter Board  but still NG  .Wonder if others have
experienced this anomaly.   Dave   W1DWZ  RI



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[Elecraft] Filters excess to your needs?

[Daniel Goodier]

Hi All,
 
Before placing an order with Elecraft I thought I would ask if anyone had
the following filters that they are no longer using.
 
KFL3A-2.8K  2.8 kHz, 8-pole
KFL3A-1.8K  1.8 kHz, 8-pole 
KFL3A-250250 Hz, 8-pole
 
If anyone is interested I will have a KFL3A-500500 Hz, 5-pole available
after making the changes.
 
Please direct any responses to me off the list . . . dgoodier at gmail dot
com
 
Thanks
Daniel  VE3NI / NI2D
 
 
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[Elecraft] Amp for a K2

[Ken Miller]

All,

Have updated the firmware and put in the keying mods on my K2.  Also had
a friend with some great test equipment verify that the new keyinh
waveform is as it should be to prevent key clicks when using an amp.

Now the dilemma. Torn between the K2/100 amp, and maybe a KAT100 in a
separate EC2 case or a KXPA100.

I'd like to hear comments from those that have used the KXP100 with or
without the tuner to amplify a K2.

Are there any special considerations that need to be taken into account
when using the KXPA100?

How easy is it to add the tuner later to the KXPA100?

Thanks in advance for any/all comments.

73 - Ken Miller, K6CTW   K2 # 455




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[Elecraft] KX3 na K3 Memory Editor help needed

[Jim GM]

Hi

Ok I down loaded  K3FreqMemoryEditor_1_3_3_0.msi  file.  I have a Mac Mini
computer, Apple CPU.

Where do I move the above file into so I can run the program insert my .XML
file and load the frequiency memory file, the XML file, inot the KX3?

I have never done this before and have no instructions.  HOW do I do all of
this?

A friend of mine was kind enough to send me a copy of his frequency
memories so I do not have to manually do all of it.

-- 
Jim K9TF
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Re: [Elecraft] Amp for a K2

[Matt VK2RQ]

I use the KXPA100+KXAT100 built in tuner with my K2, and it works great. Of 
course, the integration isn't quite as tight as it is with the KPA100+KAT100. 
For example, when I change bands, I need to hit the "dit" paddle to give the 
amp/tuner a squirt of RF and let it know my new QRG. But the tuner immediately 
selects the right antenna and recalls the last tuning solution for that band 
segment. I also set the power knob to 3W when doing a tuning cycle, and then 
maybe crank it up to 5W if I want a full 100W out of the amp.

In order to make the amp work the the K2, you need a key out line. The basic K2 
doesn't have this, but it is easy to add one. Here is what I did, based on an 
article from the Elecraft website:
http://www.mwrs.org.au/2014/04/20/elecraft-k2-amplifier-keying-circuit/

The benefit of using KXPA100 solution is that I can leave it at home if I want 
to take my K2+built in QRP ATU out into the field, or I can bring it along. I 
can also use the KXPA100 with my KX3, in which case it is a fully integrated 
solution. The KXPA100 is completely silent, with no fans, and relays only used 
for antenna selection/tuning/protection, whereas I understand the KPA100 has 
some noisy fans when it warms up.

Whichever way you go, the K2 is a lot of fun :-)

73,
Matt VK2RQ

> On 16 Nov 2014, at 6:33 am, Ken Miller  wrote:
> 
> All,
> 
> Have updated the firmware and put in the keying mods on my K2.  Also had
> a friend with some great test equipment verify that the new keyinh
> waveform is as it should be to prevent key clicks when using an amp.
> 
> Now the dilemma. Torn between the K2/100 amp, and maybe a KAT100 in a
> separate EC2 case or a KXPA100.
> 
> I'd like to hear comments from those that have used the KXP100 with or
> without the tuner to amplify a K2.
> 
> Are there any special considerations that need to be taken into account
> when using the KXPA100?
> 
> How easy is it to add the tuner later to the KXPA100?
> 
> Thanks in advance for any/all comments.
> 
> 73 - Ken Miller, K6CTW   K2 # 455
> 
> 
> 
> 
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Re: [Elecraft] Amp for a K2

[Matt VK2RQ]

One other thing I forgot to mention, with KPA100, you get a KIO2 RS232 CAT 
interface "for free". I had to pay extra to add one into my QRP K2. Of course 
if you are swapping the top of your K2 to change between "QRP" and "QRO" modes, 
then you might want a KIO2 for the QRP lid anyway. Of course, you can run a K2 
fitted with a KPA100  in QRP mode by powering it off the coaxial power 
connected instead of the Anderson power pole input, but then you won't have a 
KAT2 ATU, and will need something external.

Anyway, you can see we are spoiled for choices :-)

73,
Matt VK2RQ

> On 16 Nov 2014, at 7:09 am, Matt VK2RQ  wrote:
> 
> I use the KXPA100+KXAT100 built in tuner with my K2, and it works great. Of 
> course, the integration isn't quite as tight as it is with the KPA100+KAT100. 
> For example, when I change bands, I need to hit the "dit" paddle to give the 
> amp/tuner a squirt of RF and let it know my new QRG. But the tuner 
> immediately selects the right antenna and recalls the last tuning solution 
> for that band segment. I also set the power knob to 3W when doing a tuning 
> cycle, and then maybe crank it up to 5W if I want a full 100W out of the amp.
> 
> In order to make the amp work the the K2, you need a key out line. The basic 
> K2 doesn't have this, but it is easy to add one. Here is what I did, based on 
> an article from the Elecraft website:
> http://www.mwrs.org.au/2014/04/20/elecraft-k2-amplifier-keying-circuit/
> 
> The benefit of using KXPA100 solution is that I can leave it at home if I 
> want to take my K2+built in QRP ATU out into the field, or I can bring it 
> along. I can also use the KXPA100 with my KX3, in which case it is a fully 
> integrated solution. The KXPA100 is completely silent, with no fans, and 
> relays only used for antenna selection/tuning/protection, whereas I 
> understand the KPA100 has some noisy fans when it warms up.
> 
> Whichever way you go, the K2 is a lot of fun :-)
> 
> 73,
> Matt VK2RQ
> 
>> On 16 Nov 2014, at 6:33 am, Ken Miller  wrote:
>> 
>> All,
>> 
>> Have updated the firmware and put in the keying mods on my K2.  Also had
>> a friend with some great test equipment verify that the new keyinh
>> waveform is as it should be to prevent key clicks when using an amp.
>> 
>> Now the dilemma. Torn between the K2/100 amp, and maybe a KAT100 in a
>> separate EC2 case or a KXPA100.
>> 
>> I'd like to hear comments from those that have used the KXP100 with or
>> without the tuner to amplify a K2.
>> 
>> Are there any special considerations that need to be taken into account
>> when using the KXPA100?
>> 
>> How easy is it to add the tuner later to the KXPA100?
>> 
>> Thanks in advance for any/all comments.
>> 
>> 73 - Ken Miller, K6CTW   K2 # 455
>> 
>> 
>> 
>> 
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Re: [Elecraft] KX3 na K3 Memory Editor help needed

[Dick Dievendorff]

The program is a Windows executable, but several users have reported success
with Windows emulators on Mac (Parallels, etc.).  A file extension of .msi
is a Microsoft Installer file.

Once the program is installed, there is a Help menu item that describes how
to use the program, it's on the top menu bar.

Essentially you open the xml file with the File - Open menu item.  That
reads the file and fills in the grid.  Then you can edit or amend the grid,
and then send one, several, or all "memories" to your transceiver.

73 de Dick, K6KR

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim GM
Sent: Saturday, November 15, 2014 12:08 PM
To: Elecraft
Subject: [Elecraft] KX3 na K3 Memory Editor help needed

Hi

Ok I down loaded  K3FreqMemoryEditor_1_3_3_0.msi  file.  I have a Mac Mini
computer, Apple CPU.

Where do I move the above file into so I can run the program insert my .XML
file and load the frequiency memory file, the XML file, inot the KX3?

I have never done this before and have no instructions.  HOW do I do all of
this?

A friend of mine was kind enough to send me a copy of his frequency memories
so I do not have to manually do all of it.

--
Jim K9TF
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delivered to d...@elecraft.com

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[Elecraft] Spurious Signals in KX3 and PX3

[Dauer, Edward]

Anyone have an idea where and how I might begin tracking this down . . .

KX3 (indoors with a Buddipole) has a signal every 18 Khz across almost all of 
the HF spectrum, worst on 15M.  It also appears on the PX3 display - in all the 
same places.  On both AM and CW it sounds like a buzzing, with about a 1+ Khz 
bandwidth..

The signal level changes on the KX3 as expected with PRE and ATT cycled.  On 
the PX3 display, PRE and ATT change the base level but not the absolute value 
of the peaks.

Here's the odd thing - the audible signal disappears from the KX3 when the 
antenna is removed, but it does not disappear from the PX3 - where, again, the 
base level changes but the magnitude above base level does not.  And it remains 
in the PX3 display even when the I/Q cable is removed.

Neither the KX3's NB nor NR change anything.

The KX3 is running from batteries, so it's not the outboard power supply.  
Neither is it the PX3's wall wart, since the signals are present in the KX3 
when that supply is removed from the source.

Unfortunately it will be a while before I can move the equipment to another 
location to see if that matters.  In the meantime, anyone know a signal source 
with harmonics at 18 Khz?

Tnx,

Ted, KN1CBR
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Re: [Elecraft] KX3 na K3 Memory Editor help needed

[Rick M0LEP]

On Sat 15 Nov Dick Dievendorff wrote:
> The program is a Windows executable, but several users have reported 
> success with Windows emulators on Mac (Parallels, etc.).

Some of them work some of the time, if you're lucky. I've found ones 
that deal with anything more than screen, mouse and keyboard tend to go 
belly-up with emulators.

It's a great pity the memory editing isn't incorporated into the main 
utility programs for K3 and KX3, as they do work on Mac (and, I think, 
at least some flavours of Linux too).

-- 
73, Rick, M0LEP   (KX3 #3281)
Message ends...Engage coffee making mode.

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Re: [Elecraft] Spurious Signals in KX3 and PX3

[Gerry leary]

Sometimes older answering machines can do that. Also some digital power 
supplies can do that. I would try unplugging things or turning off circuit 
breakers to see if you can make that noise go away. I have heard similar noises.

Sent from my iPhone this time 

> On Nov 15, 2014, at 3:42 PM, Dauer, Edward  wrote:
> 
> Anyone have an idea where and how I might begin tracking this down . . .
> 
> KX3 (indoors with a Buddipole) has a signal every 18 Khz across almost all of 
> the HF spectrum, worst on 15M.  It also appears on the PX3 display - in all 
> the same places.  On both AM and CW it sounds like a buzzing, with about a 1+ 
> Khz bandwidth..
> 
> The signal level changes on the KX3 as expected with PRE and ATT cycled.  On 
> the PX3 display, PRE and ATT change the base level but not the absolute value 
> of the peaks.
> 
> Here's the odd thing - the audible signal disappears from the KX3 when the 
> antenna is removed, but it does not disappear from the PX3 - where, again, 
> the base level changes but the magnitude above base level does not.  And it 
> remains in the PX3 display even when the I/Q cable is removed.
> 
> Neither the KX3's NB nor NR change anything.
> 
> The KX3 is running from batteries, so it's not the outboard power supply.  
> Neither is it the PX3's wall wart, since the signals are present in the KX3 
> when that supply is removed from the source.
> 
> Unfortunately it will be a while before I can move the equipment to another 
> location to see if that matters.  In the meantime, anyone know a signal 
> source with harmonics at 18 Khz?
> 
> Tnx,
> 
> Ted, KN1CBR
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Re: [Elecraft] Amp for a K2

[Kevin Stover]

KPA100 wins hands down.
The KXPA100 won't integrate with the K2 nearly as well as the KPA100 
which was designed for the K2.
There's nothing the KXP100 can do for the K2 that the KPA100 can't 
dobetter.


--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441

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Re: [Elecraft] Amp for a K2

[Phil Wheeler]

Except the KXPA100 will work with the KX3 and other rigs, which can be a big 
plus. 

Phil - Sent from my iPad

> On Nov 15, 2014, at 15:46, Kevin Stover  wrote:
> 
> KPA100 wins hands down.
> The KXPA100 won't integrate with the K2 nearly as well as the KPA100 which 
> was designed for the K2.
> There's nothing the KXP100 can do for the K2 that the KPA100 can't 
> dobetter.
> 
> -- 
> R. Kevin Stover
> AC0H
> ARRL
> FISTS #11993
> SKCC #215
> NAQCC #3441
> 
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[Elecraft] 回覆﹕ Re: Amp for a K2

[Johnny Siu]

I would prefer kxpa100 which is more flexible if u have other rigs.  In future, 
if surplus to your requirements, it is far more easy to sell the kxpa100. 73 
johnny vr2xmc

發自 Yahoo 電子信箱 Android 版

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Re: [Elecraft] Amp for a K2

[Don Wilhelm]

Ken,

I have not used my KXPA100 and KXAT100 with my K2, but it can be done if 
you add a keying output circuit to your K2.


The KXPA100 (and KXAT100) take a dit or two to 'sync up' with the K2, 
but other than that it works quite nicely.


OTOH, the KPA100 and KAT100 follow the K2 band changes automatically.  
But if you are mounting the KPA100 and KAT100-2 in an external EC2 
enclosure, you will need the KIO2 (or a special cable to pipe the 
required internal signals to the EC2 enclosure if you do not wish to 
have a computer control connection).  You do not need the amp keying 
circuit with the KPA100.


So those are the requirements for either setup, take your pick.  The 
price of the KPA100, KAT100-2 and EC2 enclosure is about 3/4 the cost of 
the KXPA100 and KXAT100 kits - no soldering with the latter.


73,
Don W3FPR

On 11/15/2014 2:33 PM, Ken Miller wrote:

All,

Have updated the firmware and put in the keying mods on my K2.  Also had
a friend with some great test equipment verify that the new keyinh
waveform is as it should be to prevent key clicks when using an amp.

Now the dilemma. Torn between the K2/100 amp, and maybe a KAT100 in a
separate EC2 case or a KXPA100.

I'd like to hear comments from those that have used the KXP100 with or
without the tuner to amplify a K2.

Are there any special considerations that need to be taken into account
when using the KXPA100?

How easy is it to add the tuner later to the KXPA100?

Thanks in advance for any/all comments.

73 - Ken Miller, K6CTW   K2 # 455




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Re: [Elecraft] Amp for a K2

[Guy Olinger K2AV]

I have a KPA100 and KAT100 in an EC2 to go behind my K2/10 + battery when I
am using it in the shack. It is absolutely seamless.

There are some danger, danger issues with the cabling, like do not use a
normal RS232 cord from it to a PC...destructions. Only the three basic
RS232 leads are for computer. The rest of the pins are used to talk to the
KPA100 and KAT100. The DB9 connection on the back of the K2 is proprietary,
period. I have a split cable that breaks up into a regular three wire RS232
>From K2 to the computer, and another cable from K2 to the KPA/KAT100.

You can build it or occasionally an already built KPA/KAT100/EC2 will show
up for sale, or a WTB posting can stir up one gone surplus. The latter is
how I got mine, third hand, originally built by one of the first to ever
make one.

I don't have anything else like my K2/10/Battery. In simply awful 160/80m
situations very close to 50 kW BC stations, where the analyzers just give
up, I can use the portable battery K2 and tune something by SWR. Can
directly test an antenna and listen to received signals. I'll be keeping
mine. The only conversion I might try is to a lithium ion battery pack with
smart charger and solar panel controller to replace the stock SLA.

So the back-end PA/tuner allows me to use the K2/10 in the station with a
very simple hookup to the EC2, and the EC2 retains all the fixed station
hookups. The K2 with the back-end is a good 2nd radio in a contest. And
plenty good enough for casual if the K3 goes on a trip.

73, Guy K2AV

On Sat, Nov 15, 2014 at 6:46 PM, Kevin Stover 
wrote:

> KPA100 wins hands down.
> The KXPA100 won't integrate with the K2 nearly as well as the KPA100 which
> was designed for the K2.
> There's nothing the KXP100 can do for the K2 that the KPA100 can't
> dobetter.
>
> --
> R. Kevin Stover
> AC0H
> ARRL
> FISTS #11993
> SKCC #215
> NAQCC #3441
>
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[Elecraft] Controlled Envelope Single Sideband CESS)

[Chuck - AE4CW]

To Wayne and Lyle especially...but of course to all too.I'd be very
interested to hear your assessment of Controlled Envelope Single Sideband as
described in the Nov./Dec. 2014 issue of QEX.  Might it be applicable (i.e.
implementable) in the K3 and/or KX3?  Or, is it a good candidate for future
Elecraft transceivers?
http://www.arrl.org/files/file/QEX_Next_Issue/2014/Nov-Dec_2014/Hershberger_QEX_11_14.pdf

 
---Chuck, AE4CW



-
---
Chuck, AE4CW
--
View this message in context: 
http://elecraft.365791.n2.nabble.com/Controlled-Envelope-Single-Sideband-CESS-tp7594762.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Controlled Envelope Single Sideband CESS)

[Walter Underwood]

Elecraft is always looking at improvements. Wayne sent this response to another 
compression discussion on the KX3 list a few days ago:

"I believe we may be able to improve compression without causing splatter, but 
this will require experimentation with new algorithms. This is definitely a 
goal for a future DSP firmware release."

wunder
K6WRU
CM87wj
http://observer.wunderwood.org/

On Nov 15, 2014, at 5:49 PM, Chuck - AE4CW  wrote:

> To Wayne and Lyle especially...but of course to all too.I'd be very
> interested to hear your assessment of Controlled Envelope Single Sideband as
> described in the Nov./Dec. 2014 issue of QEX.  Might it be applicable (i.e.
> implementable) in the K3 and/or KX3?  Or, is it a good candidate for future
> Elecraft transceivers?
> http://www.arrl.org/files/file/QEX_Next_Issue/2014/Nov-Dec_2014/Hershberger_QEX_11_14.pdf
> 
>  
> ---Chuck, AE4CW
> 
> -
> ---
> Chuck, AE4CW
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/Controlled-Envelope-Single-Sideband-CESS-tp7594762.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Spurious Signals in KX3 and PX3

[Alan]

Horizontal scan rate on a video monitor?

Alan N1AL

On 11/15/2014 02:42 PM, Dauer, Edward wrote:

Anyone have an idea where and how I might begin tracking this down . . .

KX3 (indoors with a Buddipole) has a signal every 18 Khz across almost all of 
the HF spectrum, worst on 15M.  It also appears on the PX3 display - in all the 
same places.  On both AM and CW it sounds like a buzzing, with about a 1+ Khz 
bandwidth..

The signal level changes on the KX3 as expected with PRE and ATT cycled.  On 
the PX3 display, PRE and ATT change the base level but not the absolute value 
of the peaks.

Here's the odd thing - the audible signal disappears from the KX3 when the 
antenna is removed, but it does not disappear from the PX3 - where, again, the 
base level changes but the magnitude above base level does not.  And it remains 
in the PX3 display even when the I/Q cable is removed.

Neither the KX3's NB nor NR change anything.

The KX3 is running from batteries, so it's not the outboard power supply.  
Neither is it the PX3's wall wart, since the signals are present in the KX3 
when that supply is removed from the source.

Unfortunately it will be a while before I can move the equipment to another 
location to see if that matters.  In the meantime, anyone know a signal source 
with harmonics at 18 Khz?

Tnx,

Ted, KN1CBR
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Re: [Elecraft] Spurious Signals in KX3 and PX3

[Walter Underwood]

Plasma TV in the neighborhood?

The PX3 could be picking it up through the connecting cables if it is strong 
enough.

wunder
K6WRU
CM87wj
http://observer.wunderwood.org/

On Nov 15, 2014, at 6:26 PM, Alan  wrote:

> Horizontal scan rate on a video monitor?
> 
> Alan N1AL
> 
> On 11/15/2014 02:42 PM, Dauer, Edward wrote:
>> Anyone have an idea where and how I might begin tracking this down . . .
>> 
>> KX3 (indoors with a Buddipole) has a signal every 18 Khz across almost all 
>> of the HF spectrum, worst on 15M.  It also appears on the PX3 display - in 
>> all the same places.  On both AM and CW it sounds like a buzzing, with about 
>> a 1+ Khz bandwidth..
>> 
>> The signal level changes on the KX3 as expected with PRE and ATT cycled.  On 
>> the PX3 display, PRE and ATT change the base level but not the absolute 
>> value of the peaks.
>> 
>> Here's the odd thing - the audible signal disappears from the KX3 when the 
>> antenna is removed, but it does not disappear from the PX3 - where, again, 
>> the base level changes but the magnitude above base level does not.  And it 
>> remains in the PX3 display even when the I/Q cable is removed.
>> 
>> Neither the KX3's NB nor NR change anything.
>> 
>> The KX3 is running from batteries, so it's not the outboard power supply.  
>> Neither is it the PX3's wall wart, since the signals are present in the KX3 
>> when that supply is removed from the source.
>> 
>> Unfortunately it will be a while before I can move the equipment to another 
>> location to see if that matters.  In the meantime, anyone know a signal 
>> source with harmonics at 18 Khz?
>> 
>> Tnx,
>> 
>> Ted, KN1CBR
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