Re: [Elecraft] KX3 SDR

[James Austin]

Another free online DSP book, that I stumbled upon this evening is Signal
Processing for Communications. I have not gone much past the table of
contents, but it looks interesting.

http://www.signalprocessingforcommunications.org/


Jim KA2RVO


On Wednesday, July 27, 2016, tomb18  wrote:

> Hi It's not that simple Basically you take the I and q signals, sample
> them with the sound card, convert them to a complex number, pop them  in a
> fast Fourier transform, do a rectangular to polar conversion and then
> calculate the magnitude in dBm.  Then plot them. There's a few more nuances
> but that's the overall idea. Check out the free book on the Internet called
> the scientists guide to digital signal processing.73 Tom va2fsq.com
>
>
> Sent from my Samsung Galaxy smartphone.
>  Original message From: Enzo Adrian-Reyes <
> enzo.adrianre...@gmail.com > Date: 2016-07-27  7:16 PM
> (GMT-05:00) To: Elecraft List >
> Subject: [Elecraft] KX3 SDR
> Hi All
>
> Yes this topic might be a little bit more complicated than the title
> suggest.
>
> So I have the KX3 plugged into the audio input of my computer, and its
> sending quadrature data (IQ) to the sound card, the sound card samples at
> 96Khz.
>
> So my question is how I process this? Yes I know use a piece of software,
> but I am trying to write this, I know the IQ data is coming through down
> and if I use the right process on the IQ data I get base band data out. I
> kind of know that however I dont understand the SDR data coming out, so for
> example and I getting sample of IQ data at freq point Y, or is it  a
> circular buffer arrangement.
>
> I guess what I am saying is, is the IQ data coming from teh KX3 data from
> teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some
> additional side bands?
>
> How are bandwith and sampling rate related? I mean if I am sampling at at
> 96Khz, with a band with of 48Khz does that mean I am only getting 2 samples
> per second at perticular freq??? Or am I getting the entire band of 48Khz
> at 96Khz.
>
> Regards
> __
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Re: [Elecraft] K3 Transmitting CW in SSB mode

[Ron D'Eau Claire]

Exactly Grant. Many of the early SSB rigs were basically SSB-only. So adding
a tone to the SSB signal was the simplest way to send "cw". But the opposite
sideband suppression is never perfect - too often far from it. 

That was no big deal back when over half of the signals on a "phone" band
were 6 kHz wide AM signals. 

73 Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Grant
Youngman
Sent: Wednesday, July 27, 2016 3:10 PM
To: gkid...@ilstu.edu
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Transmitting CW in SSB mode

It's just a"few lines of code" ;) 

All done in DSP most likely.  Simpler than doing the same thing in an analog
radio. 

Grant NQ5T



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Re: [Elecraft] KX3 SDR

[Joe Stone (KF5WBO)]

Hi Enzo,

I'd recommend that you look at some of the Raspberry Pi / Elecraft KX3
panadapters,

http://twitter.com/giorgiofox/status/694969541521207296

https://github.com/Giorgiofox/panadapter

73's

Joe Stone
KF5WBO



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View this message in context: 
http://elecraft.365791.n2.nabble.com/KX3-SDR-tp7620795p7620805.html
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Re: [Elecraft] KX3 SDR

[tomb18]

HiI have little experience in demodulation of the signals but I did do SSB and 
AM at one time. Basically once you have the samples in the fre1uency domain you 
will want to apply a bandpass filters and shift it down to baseband,  do an 
inverse fft and then a Hilbert transform to demodulate the SSB signal.Again you 
best bet is the free online book I mention.73 Tom 


Sent from my Samsung Galaxy smartphone.
 Original message From: Enzo Adrian-Reyes 
 Date: 2016-07-27  8:04 PM  (GMT-05:00) To: tomb18 
 Cc: Elecraft List  Subject: Re: 
[Elecraft] KX3 SDR 
Hi Tom
I never thought it was simple :)
I am just trying to understand what is going on, so given by what you've said I 
would push the IQ data coming from the KX3 into an FFT, that FFT would then 
produce the circular buffer  that would  let me analyse what signals are in 
that band?
But this would be in the frequency domain then, however I am not interested in 
a band plot,  I have a signal at Freq X, with the KX3 tuned at Y, (X=Y), would 
I have to still pump that IQ data into the FFT to filter all the other signals 
out, then inverse teh FFT to get the IQ data that I would want?
Regards

On Thu, Jul 28, 2016 at 9:41 AM, tomb18  wrote:
Hi It's not that simple Basically you take the I and q signals, sample them 
with the sound card, convert them to a complex number, pop them  in a fast 
Fourier transform, do a rectangular to polar conversion and then calculate the 
magnitude in dBm.  Then plot them. There's a few more nuances but that's the 
overall idea. Check out the free book on the Internet called the scientists 
guide to digital signal processing.73 Tom va2fsq.com


Sent from my Samsung Galaxy smartphone.
 Original message From: Enzo Adrian-Reyes 
 Date: 2016-07-27  7:16 PM  (GMT-05:00) To: 
Elecraft List  Subject: [Elecraft] KX3 SDR 
Hi All

Yes this topic might be a little bit more complicated than the title
suggest.

So I have the KX3 plugged into the audio input of my computer, and its
sending quadrature data (IQ) to the sound card, the sound card samples at
96Khz.

So my question is how I process this? Yes I know use a piece of software,
but I am trying to write this, I know the IQ data is coming through down
and if I use the right process on the IQ data I get base band data out. I
kind of know that however I dont understand the SDR data coming out, so for
example and I getting sample of IQ data at freq point Y, or is it  a
circular buffer arrangement.

I guess what I am saying is, is the IQ data coming from teh KX3 data from
teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some
additional side bands?

How are bandwith and sampling rate related? I mean if I am sampling at at
96Khz, with a band with of 48Khz does that mean I am only getting 2 samples
per second at perticular freq??? Or am I getting the entire band of 48Khz
at 96Khz.

Regards
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Re: [Elecraft] KX3 SDR

[Lyle Johnson]

The signals at the IQ jack on the KX3 are analog, not digital. They are 
centered approximately 8 kHz away from the dial frequency as the KX3 
uses an internal offset of 8 kHz.  Depending on the firmware release and 
user settable options, that offset may be on either side of the center 
of the IQ audio.


The rate at which you sample it in general will determine, and in any 
case will certainly limit, the maximum bandwidth you can digitize for 
further processing.


Internally, the KX3 samples the analog IQ signals at 48 kHz.

Externally you can sample at any rate you desire that your A/D 
(soundcard) will support, as long as you take into account anti-aliasing 
filtering and the bandwidth/response of the analog circuitry in the KX3 
itself, and any similar limitations of the soundcard including its 
analog circuitry and the characteristics of its ADC.  For example,many 
ADCs do noise shaping of their sampling systems to prefer 0 to 20 kHz at 
the expense of internal noise humps above 20 kHz.


General information about the frequency rolloff of the KX3 analog IQ 
signals have been discussed here in the past, and I think (but have not 
checked) that they are in the Owner's Manual.  You can also observe 
them, perhaps using your proposed soundcard and the tools that gnu radio 
provides for you to explore these topics.


73,

Lyle KK7P



On 7/27/16 5:43 PM, Enzo Adrian-Reyes wrote:

Hi

Yes, well I have used those in the past, hence my confusion, when I see
bandwith of a SDR at lets say 24Khz
and I am sampling at 48Khz. Does that mean I am sampling the whole bandwith
of 24Khz centered on freq X, or
am I a sampling some point Y at +/- from the center frequency...


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Re: [Elecraft] KX3 SDR

[Enzo Adrian-Reyes]

Hi

Yes, well I have used those in the past, hence my confusion, when I see
bandwith of a SDR at lets say 24Khz
and I am sampling at 48Khz. Does that mean I am sampling the whole bandwith
of 24Khz centered on freq X, or
am I a sampling some point Y at +/- from the center frequency.

I am trying to design a digital mode, and while I do understand the
concepts, could do it in GNU radio but it abstracts a lot of this away, and
I would like to do this in C/C++
So before getting there I have to know what is going on, especially what
data is coming from the device.

Thinking about it yeah it would have to be a stream of IQ signals coming
from the KX3 with a certain freq set, but I am guessing its in the time
domain. Not at the freq domain?



On Thu, Jul 28, 2016 at 10:26 AM, Don Wilhelm 
wrote:

> If you are writing your own software, you will have to become proficient
> in Digital Signal Processing.  The I and Q signals are simply baseband
> signals that are 90 degrees out of phase - by themselves, they will do
> nothing but audio signals, but with DSP processing, they can do most
> anything that is possible in the math of digital signals - limited only by
> your processing power and skills at DSP signal processing.
>
> Run them through FFT transforms to convert them to digital signals, and
> then do the math of your DSP algorithms to produce whatever you want -
> panadapter display, demodulation, etc.  You can add filtering and other
> things like AGC, Noise Reduction, Noise Blanking, and a whole variety of
> effects.  It is all in how you choose to implement you DSP mathematical
> functions.
>
> Rather than write your own, there are several DSP applications available
> for free or at nominal cost - try HDSDR or NaP3 or WIN4K3 as examples.
> Once you see what is happening with those applications, you may be moved
> to write your own DSP application to process the I and Q signals.
>
> 73,
> Don W3FPR
>
>
> On 7/27/2016 7:16 PM, Enzo Adrian-Reyes wrote:
>
>> Hi All
>>
>> Yes this topic might be a little bit more complicated than the title
>> suggest.
>>
>> So I have the KX3 plugged into the audio input of my computer, and its
>> sending quadrature data (IQ) to the sound card, the sound card samples at
>> 96Khz.
>>
>> So my question is how I process this? Yes I know use a piece of software,
>> but I am trying to write this, I know the IQ data is coming through down
>> and if I use the right process on the IQ data I get base band data out. I
>> kind of know that however I dont understand the SDR data coming out, so
>> for
>> example and I getting sample of IQ data at freq point Y, or is it  a
>> circular buffer arrangement.
>>
>> I guess what I am saying is, is the IQ data coming from teh KX3 data from
>> teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some
>> additional side bands?
>>
>> How are bandwith and sampling rate related? I mean if I am sampling at at
>> 96Khz, with a band with of 48Khz does that mean I am only getting 2
>> samples
>> per second at perticular freq??? Or am I getting the entire band of 48Khz
>> at 96Khz.
>>
>>
>>
>
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Re: [Elecraft] Cleaning a K3

[Don Wilhelm]

Dick,

That was possible, and done commonly back in the old days of vacuum tube 
gear with open inductors and not too much else to be harmed by the water 
(once dried out), it worked just fine as long as lubricants were added 
to things like capacitor shafts after the 'washing'.
Today with ICs mounted to PC boards, and shielded inductors and other 
components that will not dry out readily, I do not recommend "washing" 
the PC boards.


A cleaning with air may be helpful if there is a significant dust 
accumulation - I recently did that with my computer and it was 
successful - the computer was shutting down due to temperature.


You may have to think of your K3 more like a computer if you consider 
the various cleaning methods.  Use some common sense. Heat sinks can be 
washed if you take care to keep any attached electronics away from the 
water - thoughts like that can be beneficial when contemplating a 
"cleaning".


73,
Don W3FPR

On 7/27/2016 8:07 PM, Richard Fjeld wrote:
I read about guys whose rigs were flooded a few years back, and they 
washed them in water and dried them somehow.  Said they worked fine 
after that.  Hard to imagine though.


Dick, n0ce


On 7/27/2016 1:15 PM, Fred Jensen wrote:
My S3-line acquired a chronic case of creeping fungus on the chassis 
while packed up and stored in the Philippines for 4 years.  Returning 
home, I took it to the DIY car wash a couple of times and then dried 
it in the sun.  Seemed to work really well, except for the fungi 
living in the IF cans.  YMMV, I won't be doing that to my K3 however.


I'd be real wary of any kind of solvent(s), circuit boards used to be 
washed with distilled water, maybe still are.  Here in No NV, our 
humidity runs in the single digits in the summer, things dry in the 
sun very fast.




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Re: [Elecraft] Cleaning a K3

[Eric Swartz - WA6HHQ, Elecraft]

Looks like we have beaten this one to death. ;-)  Time to end the thread.

In general, please self moderate (limiting the number of posts on a topic)  and 
do not wait for me to jump in, as I can get busy or may be out of town when 
these long threads occur.


73,

Eric
Moderator (hopefully not for life!)
/elecraft.com/
===

On 7/27/2016 5:07 PM, Richard Fjeld wrote:
I read about guys whose rigs were flooded a few years back, and they washed 
them in water and dried them somehow.  Said they worked fine after that.  Hard 
to imagine though.


Dick, n0ce


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Re: [Elecraft] KX3 SDR

[Don Wilhelm]

If you are writing your own software, you will have to become proficient 
in Digital Signal Processing.  The I and Q signals are simply baseband 
signals that are 90 degrees out of phase - by themselves, they will do 
nothing but audio signals, but with DSP processing, they can do most 
anything that is possible in the math of digital signals - limited only 
by your processing power and skills at DSP signal processing.


Run them through FFT transforms to convert them to digital signals, and 
then do the math of your DSP algorithms to produce whatever you want - 
panadapter display, demodulation, etc.  You can add filtering and other 
things like AGC, Noise Reduction, Noise Blanking, and a whole variety of 
effects.  It is all in how you choose to implement you DSP mathematical 
functions.


Rather than write your own, there are several DSP applications available 
for free or at nominal cost - try HDSDR or NaP3 or WIN4K3 as examples.
Once you see what is happening with those applications, you may be moved 
to write your own DSP application to process the I and Q signals.


73,
Don W3FPR

On 7/27/2016 7:16 PM, Enzo Adrian-Reyes wrote:

Hi All

Yes this topic might be a little bit more complicated than the title
suggest.

So I have the KX3 plugged into the audio input of my computer, and its
sending quadrature data (IQ) to the sound card, the sound card samples at
96Khz.

So my question is how I process this? Yes I know use a piece of software,
but I am trying to write this, I know the IQ data is coming through down
and if I use the right process on the IQ data I get base band data out. I
kind of know that however I dont understand the SDR data coming out, so for
example and I getting sample of IQ data at freq point Y, or is it  a
circular buffer arrangement.

I guess what I am saying is, is the IQ data coming from teh KX3 data from
teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some
additional side bands?

How are bandwith and sampling rate related? I mean if I am sampling at at
96Khz, with a band with of 48Khz does that mean I am only getting 2 samples
per second at perticular freq??? Or am I getting the entire band of 48Khz
at 96Khz.




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Re: [Elecraft] Cleaning a K3

[Richard Fjeld]

I read about guys whose rigs were flooded a few years back, and they 
washed them in water and dried them somehow.  Said they worked fine 
after that.  Hard to imagine though.


Dick, n0ce


On 7/27/2016 1:15 PM, Fred Jensen wrote:
My S3-line acquired a chronic case of creeping fungus on the chassis 
while packed up and stored in the Philippines for 4 years.  Returning 
home, I took it to the DIY car wash a couple of times and then dried 
it in the sun.  Seemed to work really well, except for the fungi 
living in the IF cans.  YMMV, I won't be doing that to my K3 however.


I'd be real wary of any kind of solvent(s), circuit boards used to be 
washed with distilled water, maybe still are.  Here in No NV, our 
humidity runs in the single digits in the summer, things dry in the 
sun very fast.


73,

Fred K6DGW
Sparks NV
Washoe County DM09dn


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Re: [Elecraft] KX3 SDR

[Enzo Adrian-Reyes]

Hi Tom

I never thought it was simple :)

I am just trying to understand what is going on, so given by what you've
said I would push the IQ data coming from the KX3 into an FFT, that FFT
would then produce the circular buffer  that would  let me analyse what
signals are in that band?

But this would be in the frequency domain then, however I am not interested
in a band plot,  I have a signal at Freq X, with the KX3 tuned at Y, (X=Y),
would I have to still pump that IQ data into the FFT to filter all the
other signals out, then inverse teh FFT to get the IQ data that I would
want?

Regards


On Thu, Jul 28, 2016 at 9:41 AM, tomb18  wrote:

> Hi It's not that simple
> Basically you take the I and q signals, sample them with the sound card,
> convert them to a complex number, pop them  in a fast Fourier transform, do
> a rectangular to polar conversion and then calculate the magnitude in dBm.
> Then plot them. There's a few more nuances but that's the overall idea.
> Check out the free book on the Internet called the scientists guide to
> digital signal processing.
> 73 Tom
> va2fsq.com
>
>
>
> Sent from my Samsung Galaxy smartphone.
>
>  Original message 
> From: Enzo Adrian-Reyes 
> Date: 2016-07-27 7:16 PM (GMT-05:00)
> To: Elecraft List 
> Subject: [Elecraft] KX3 SDR
>
> Hi All
>
> Yes this topic might be a little bit more complicated than the title
> suggest.
>
> So I have the KX3 plugged into the audio input of my computer, and its
> sending quadrature data (IQ) to the sound card, the sound card samples at
> 96Khz.
>
> So my question is how I process this? Yes I know use a piece of software,
> but I am trying to write this, I know the IQ data is coming through down
> and if I use the right process on the IQ data I get base band data out. I
> kind of know that however I dont understand the SDR data coming out, so for
> example and I getting sample of IQ data at freq point Y, or is it  a
> circular buffer arrangement.
>
> I guess what I am saying is, is the IQ data coming from teh KX3 data from
> teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some
> additional side bands?
>
> How are bandwith and sampling rate related? I mean if I am sampling at at
> 96Khz, with a band with of 48Khz does that mean I am only getting 2 samples
> per second at perticular freq??? Or am I getting the entire band of 48Khz
> at 96Khz.
>
> Regards
> __
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>
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Re: [Elecraft] KX3 SDR

[tomb18]

Hi It's not that simple Basically you take the I and q signals, sample them 
with the sound card, convert them to a complex number, pop them  in a fast 
Fourier transform, do a rectangular to polar conversion and then calculate the 
magnitude in dBm.  Then plot them. There's a few more nuances but that's the 
overall idea. Check out the free book on the Internet called the scientists 
guide to digital signal processing.73 Tom va2fsq.com


Sent from my Samsung Galaxy smartphone.
 Original message From: Enzo Adrian-Reyes 
 Date: 2016-07-27  7:16 PM  (GMT-05:00) To: 
Elecraft List  Subject: [Elecraft] KX3 SDR 
Hi All

Yes this topic might be a little bit more complicated than the title
suggest.

So I have the KX3 plugged into the audio input of my computer, and its
sending quadrature data (IQ) to the sound card, the sound card samples at
96Khz.

So my question is how I process this? Yes I know use a piece of software,
but I am trying to write this, I know the IQ data is coming through down
and if I use the right process on the IQ data I get base band data out. I
kind of know that however I dont understand the SDR data coming out, so for
example and I getting sample of IQ data at freq point Y, or is it  a
circular buffer arrangement.

I guess what I am saying is, is the IQ data coming from teh KX3 data from
teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some
additional side bands?

How are bandwith and sampling rate related? I mean if I am sampling at at
96Khz, with a band with of 48Khz does that mean I am only getting 2 samples
per second at perticular freq??? Or am I getting the entire band of 48Khz
at 96Khz.

Regards
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[Elecraft] KX3 SDR

[Enzo Adrian-Reyes]

Hi All

Yes this topic might be a little bit more complicated than the title
suggest.

So I have the KX3 plugged into the audio input of my computer, and its
sending quadrature data (IQ) to the sound card, the sound card samples at
96Khz.

So my question is how I process this? Yes I know use a piece of software,
but I am trying to write this, I know the IQ data is coming through down
and if I use the right process on the IQ data I get base band data out. I
kind of know that however I dont understand the SDR data coming out, so for
example and I getting sample of IQ data at freq point Y, or is it  a
circular buffer arrangement.

I guess what I am saying is, is the IQ data coming from teh KX3 data from
teh Centre Freq (+/-) the bandwith scope, or just the centre freq + some
additional side bands?

How are bandwith and sampling rate related? I mean if I am sampling at at
96Khz, with a band with of 48Khz does that mean I am only getting 2 samples
per second at perticular freq??? Or am I getting the entire band of 48Khz
at 96Khz.

Regards
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Re: [Elecraft] [KX3] Bioment 11.1V 2600 mAH battery pack

[Bob Nielsen]

Fortunately you can use the cheap batteries external to the KX2, 
connected by several hundred feet of wire.



On 7/27/16 4:01 PM, Dkabell dkab...@gmail.com [KX3] wrote:
I agree!  I continue to be amazed to see discussions about cheap 
battery solutions by people who have purchased relatively high cost 
Elecraft products.  This is especially true of batteries that one 
might actually install in a premium   Elecraft device, such as the 
KX2. On the other hand, ham radio has always been about exploring all 
options.




Sent from my iPad

On Jul 26, 2016, at 6:45 PM, Bill wrjohnso...@hotmail.com 
 [KX3] > wrote:


If you have never had  lithium battery “experience”  you could have 
everything to lose.  They are violent if you don’t have good 
batteries, charger and some knowledge, like read the directions.


Bill

K9YEQ

*From:*k...@yahoogroups.com  
[mailto:k...@yahoogroups.com] *On Behalf Of *Charles Cupp 
w6...@hotmail.com  [KX3]

*Sent:* Sunday, July 24, 2016 6:02 PM
*To:* Hank Greeb >
*Cc:* KX3 Yahoogroups >
*Subject:* Re: [KX3] Bioment 11.1V 2600 mAH battery pack

What do we got to lose Hank?? Tnx Charly

Sent from my iPad Mini 64gig---(Life is too short to Fly Coach)


On Jul 24, 2016, at 15:49, Hank Greeb n...@arrl.org 
 [KX3] > wrote:


Charles:

So, you want a form factor which will fit in the KX2?  No
guarantee this is the rock bottom price for the BIOMET form
factor, and, no guarantee as to the reliability of the vendor,
nor whether the insides of the pack are "really" up the the
Biomet specifications, here's one which claims to be "BM-BAT-4
LS1865L220 3SIPMXZ for Bionet BM3 BM3 plus BM5"

http://goo.gl/IIrCW2

It is listed @ $27.55 for an individual pack.  Check shipping
charges, says $7.90 to Michigan USPS

Usual caveats apply: I've never dealt with any of this vendor,
have no financial interest in whether it is legitimate or not,
and have waived my "normal" $10,000 listing fee.
72/73 de n8xx Hg
QRP >99.44% of the time

On 7/24/2016 6:30 PM, Charles Cupp wrote:

Problem is, won't fit inside a kx2. But ur right Hank, sure
is cheap!-Charly

Sent from my iPad Mini 64gig---(Life is too short to Fly Coach)


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Re: [Elecraft] K2100 and KAT100 Question and a side note about Alaska

[Edward R Cole]

Ted,

Can't tell you how often folks with lower-48 experience expect to 
take a vacation in late August or September during "the cooler sunny 
fall months".  Maybe where you live its like that in August-September 
but in southcentral and southeast Alaska its time for the fall 
monsoons.  Summer wx up here is great from mid-May to mid-July after 
which the wx shifts to the rainy season and temps drop.  In parts of 
AK first frost arrives the third week of August and leaves start 
dropping.  Our trees are bare by end of Sept.


But the coastal climate from the Alaska Peninsula thru Anchorage - 
Prince William Sound down the SE coast is overcast rainy and 50-60F 
wx starting mid to end of July.  Oh it stops raining about every 
8-9th day so one can mow the lawn which has grown 6-8 inches in 
between "dry" days.


We had a super nice summer this year with up into the 70's sunny and 
clear.  But that is over now (except very occasional day or two thru 
fall until it snows (usually by Halloween).  Except the last three 
winters have been unusually warm with above freezing temps and nearly 
no snow (I plowed only two time last winter).  Normally we have 18-24 
inches of snow cover all winter with temps down to -15F and a very 
few down to -25F (not seen in almost 8 years).


Welcome to global warming!  Not a theory up here.

73, Ed
PS I've lived up here for 37 years so have seen the change.

At 03:32 PM 7/26/2016, Dauer, Edward wrote:

snip---

Incidentally, in case Ed Cole, KL7UW, is reading the mail, I have 
been cruising the inside passage for the past week, Sitka today and 
heading for Anchorage two days from now.  Is it always incessant 
cold rain this time of year?  Never mind sunspots; I have forgotten 
what the sun looks like.  Otherwise, beautiful territory.


Ted, KN1CBR


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] Cleaning a K3

[Wes Stewart]

I remember the good old days when it was rosin flux and Freon TF in a vapor 
degreaser :-)


Then my employer (Hughes) invented "lemon juice" flux as we called it, and gave 
away the patent.




On 7/27/2016 2:11 PM, Clay Autery wrote:

As I originally said, "NOT recommending this because it requires a great
deal of

care/experience"...

I use 99% Iso. Alcohol when necessary.  And I'm not saying to flood the board with it.  
Also not saying to get it near enclosed components...  One should use proper instruments 
and care when utilizing ANY solvent, TO INCLUDE water... which BTW, is the 
"universal solvent".

73,



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Re: [Elecraft] K3 Transmitting CW in SSB mode

[Don Wilhelm]

Actually, I believe the frequency shift is done in the MCU firmware.  
Control of the synthesizers is what is needed.


Those "few lines of code" can be problematic (not with what is intended, 
but other aspects that it interfered with) - that is why the firmware is 
tested in-house (or by a few out-of-house field testers) before it is 
even released as a beta version.


73,
Don W3FPR

On 7/27/2016 6:09 PM, Grant Youngman wrote:

It's just a"few lines of code" ;)

All done in DSP most likely.  Simpler than doing the same thing in an analog 
radio.

Grant NQ5T

Sent from my iPhone


On Jul 27, 2016, at 5:22 PM, George Kidder  wrote:

Thanks, Don.  Harder to implement, but safer.




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Re: [Elecraft] Cleaning a K3

[Don Wilhelm]

You may want to note that Elecraft does not recommend cleaning flux at all.
Those working in support and repair for the thru-hole legacy line may 
see a board we have to work on that is so covered with flux residue that 
it has to be removed.
Even then, we work with cotton swabs in a small area at a time with 99% 
iso alcohol.


I once had a K1 repair which had failed because the builder used 
something for a flux cleaner.  The residue had crept under the ICs, 
R-Paks, other components and the connectors.  After an extended repair 
time, it worked, but I heard a report about a year later that it stopped 
working again - I guess I did not remove enough components to clean 
under them!


Rosin Flux is better left in place, it is non-conductive if let alone - 
but when attempts to remove the flux are used, the flux and cleaner will 
produce conductive paths - so if you do remove flux, remove it and its 
residue completely or you are likely to have trouble later.


Use a solder with a mildly reactive rosin flux, Kester 285 is one of 
those.  It does not leave much flux residue and does not need to be 
cleaned.  Highly reactive flux solder (like the popular Kester 44) does 
leave a good deal of flux, but it too usually does not need to be cleaned.


We have morphed the original question - which was about cleaning a K3 
(of dust and dirt mainly), so further responses should change the 
subject line to something like 'cleaning flux from boards'.


73,
Don W3FPR

On 7/27/2016 5:11 PM, Clay Autery wrote:

As I originally said, "NOT recommending this because it requires a great
deal of

care/experience"...

I use 99% Iso. Alcohol when necessary.  And I'm not saying to flood the board with it.  
Also not saying to get it near enclosed components...  One should use proper instruments 
and care when utilizing ANY solvent, TO INCLUDE water... which BTW, is the 
"universal solvent".




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Re: [Elecraft] K3 Transmitting CW in SSB mode

[Grant Youngman]

It's just a"few lines of code" ;) 

All done in DSP most likely.  Simpler than doing the same thing in an analog 
radio. 

Grant NQ5T

Sent from my iPhone

> On Jul 27, 2016, at 5:22 PM, George Kidder  wrote:
> 
> Thanks, Don.  Harder to implement, but safer.
> 
> George
> 
> 
>> On 7/27/2016 2:39 PM, Don Wilhelm wrote:
>> George,
>> 
>> The K3/K3S does *not* inject an audio tone.
>> It shifts the transmit carrier by an amount equal to your sidetone pitch.
>> Lower if you are on LSB and higher if you are on USB.
>> 
>> The effect is the same as adding a tone to a perfectly suppressed carrier, 
>> but is guaranteed to be clean.
>> 
>> 73,
>> Don W3FPR
>> 
>>> On 7/27/2016 2:21 PM, George Kidder wrote:
>>> Another way to look at the use of CW in SSB mode on the K3:  What I think 
>>> the rig does when you hit the key is inject an audio tone at the CW offset 
>>> frequency into the audio chain for the SSB signal.  If all is clean and not 
>>> distorted, the result will be a single RF frequency offset from the SSB 
>>> "carrier", and will be receivable as such by a SSB receiver tuned to the 
>>> SSB carrier frequency.
>>> 
>>> If the K3/K3S doesn't actually generate an audio tone, it sure behaves like 
>>> it.
> 
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Re: [Elecraft] K3 Transmitting CW in SSB mode

[George Kidder]

Thanks, Don.  Harder to implement, but safer.

George


On 7/27/2016 2:39 PM, Don Wilhelm wrote:

George,

The K3/K3S does *not* inject an audio tone.
It shifts the transmit carrier by an amount equal to your sidetone pitch.
Lower if you are on LSB and higher if you are on USB.

The effect is the same as adding a tone to a perfectly suppressed 
carrier, but is guaranteed to be clean.


73,
Don W3FPR

On 7/27/2016 2:21 PM, George Kidder wrote:
Another way to look at the use of CW in SSB mode on the K3:  What I 
think the rig does when you hit the key is inject an audio tone at 
the CW offset frequency into the audio chain for the SSB signal.  If 
all is clean and not distorted, the result will be a single RF 
frequency offset from the SSB "carrier", and will be receivable as 
such by a SSB receiver tuned to the SSB carrier frequency.


If the K3/K3S doesn't actually generate an audio tone, it sure 
behaves like it.




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Re: [Elecraft] Cleaning a K3

[Clay Autery]

As I originally said, "NOT recommending this because it requires a great
deal of

care/experience"...

I use 99% Iso. Alcohol when necessary.  And I'm not saying to flood the board 
with it.  Also not saying to get it near enclosed components...  One should use 
proper instruments and care when utilizing ANY solvent, TO INCLUDE water... 
which BTW, is the "universal solvent".

73,

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/27/2016 3:50 PM, Gary K9GS wrote:
> 
> Be careful using isopropyl alcohol.   You don't want the dissolved Flux 
> flowing inside switches and under components.  Then the alcohol evaporates 
> and the Flux stays inside. .not good.
> This is why the industry has largely switched to  no clean flux.  Just leave 
> it alone.
> Of course you have to know what you're using. 
>
>
>
>
> 73Gary K9GS
>
>
>  Original message 
> From: Clay Autery  
> Date: 07/27/2016  1:18 PM  (GMT-06:00) 
> To: elecraft@mailman.qth.net 
> Subject: Re: [Elecraft] Cleaning a K3 
>
> 99% Isopropyl alcohol is the approved solvent for getting flux, et al
> off boards...  It evaps rapidly and is water soluble...
>
> __
> Clay Autery, KY5G
> MONTAC Enterprises
> (318) 518-1389
>
> On 7/27/2016 1:15 PM, Fred Jensen wrote:
>> My S3-line acquired a chronic case of creeping fungus on the chassis
>> while packed up and stored in the Philippines for 4 years.  Returning
>> home, I took it to the DIY car wash a couple of times and then dried
>> it in the sun.  Seemed to work really well, except for the fungi
>> living in the IF cans.  YMMV, I won't be doing that to my K3 however.
>>
>> I'd be real wary of any kind of solvent(s), circuit boards used to be
>> washed with distilled water, maybe still are.  Here in No NV, our
>> humidity runs in the single digits in the summer, things dry in the
>> sun very fast.
>>
>> 73,
>>
>> Fred K6DGW
>> Sparks NV
>> Washoe County DM09dn
>>
>> On 7/27/2016 9:16 AM, Clay Autery wrote:
>>
>>> NOT recommending this because it requires a great deal of
>>> care/experience, but I, as my OCD dictates, also clean individual
>>> circuit boards with 99% alcohol followed by hot water.  Water is bad
>>> juju in the wrong places and you absolutely MUST make sure that it is
>>> all removed (I use elevated temps in a low humidity environment) prior
>>> to reinstallation.

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Re: [Elecraft] Cleaning a K3

[Gary K9GS]

Be careful using isopropyl alcohol.   You don't want the dissolved Flux flowing 
inside switches and under components.  Then the alcohol evaporates and the Flux 
stays inside. .not good.
This is why the industry has largely switched to  no clean flux.  Just leave it 
alone.
Of course you have to know what you're using. 




73Gary K9GS


 Original message 
From: Clay Autery  
Date: 07/27/2016  1:18 PM  (GMT-06:00) 
To: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] Cleaning a K3 

99% Isopropyl alcohol is the approved solvent for getting flux, et al
off boards...  It evaps rapidly and is water soluble...

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/27/2016 1:15 PM, Fred Jensen wrote:
> My S3-line acquired a chronic case of creeping fungus on the chassis
> while packed up and stored in the Philippines for 4 years.  Returning
> home, I took it to the DIY car wash a couple of times and then dried
> it in the sun.  Seemed to work really well, except for the fungi
> living in the IF cans.  YMMV, I won't be doing that to my K3 however.
>
> I'd be real wary of any kind of solvent(s), circuit boards used to be
> washed with distilled water, maybe still are.  Here in No NV, our
> humidity runs in the single digits in the summer, things dry in the
> sun very fast.
>
> 73,
>
> Fred K6DGW
> Sparks NV
> Washoe County DM09dn
>
> On 7/27/2016 9:16 AM, Clay Autery wrote:
>
>> NOT recommending this because it requires a great deal of
>> care/experience, but I, as my OCD dictates, also clean individual
>> circuit boards with 99% alcohol followed by hot water.  Water is bad
>> juju in the wrong places and you absolutely MUST make sure that it is
>> all removed (I use elevated temps in a low humidity environment) prior
>> to reinstallation.
>
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Re: [Elecraft] Cleaning a K3

[Gary K9GS]

Josh is exactly correct, DI is the standard.   Surfactants are sometimes added 
to increase the wetting on the board and reduce the surface tension.
I think that distilled water, under the right conditions is actually corrosive. 





73Gary K9GS


 Original message 
From: Josh Fiden  
Date: 07/27/2016  2:26 PM  (GMT-06:00) 
To: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] Cleaning a K3 

DI water is the standard, usually in a closed loop system. Most process 
now use water soluble flux. If not, sometimes a wash with addition of 
soap and/or solvent is done prior to the DI water rinsing.

73,
Josh W6XU

On 7/27/2016 11:15 AM, Fred Jensen wrote:
> circuit boards used to be washed with distilled water, maybe still are.

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Re: [Elecraft] Cleaning a K3

[Lynn W. Taylor, WB6UUT]

In a production environment, acid flux is almost universal.  Rosin flux 
requires solvents and the local air pollution cops watch you very 
closely.  The solvents are more likely to damage components than water.


A proper wave soldering system does a great job of displacing the flux, 
and water cleans the acid off very nicely.


73 -- Lynn

On 7/27/2016 12:26 PM, Josh Fiden wrote:
DI water is the standard, usually in a closed loop system. Most 
process now use water soluble flux. If not, sometimes a wash with 
addition of soap and/or solvent is done prior to the DI water rinsing.


73,
Josh W6XU 


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Re: [Elecraft] Power has disappeared

[Chris Kimball]

Thanks, Bill.

1. The rig is a K3S(100)-F which I received last Tuesday, 19 July.  It has
both the antenna tuner and the general coverage option on the one and only
receiver.

2. The rig has the antenna tuner and the dummy load is on antenna 2. It
matches my existing K2/KAT/KPA connections,
so I'm familiar with having 2 antennas.

3. As received the front panel and amplifier temperatures shown were 35C. 
The rig was much cooler than that, so I calibrated both temperatures with a
room thermometer as described in the manual.

4. The voltage on the panel was 12.8V.  It comes from a bank of 3 35A-h
batteries and varies only slightly under load.

5. As suggested, I checked the PowerPoles and they're OK.  Nothing in the
operation is intermittant.

I'm waiting on an RMA from Elecraft.




--
View this message in context: 
http://elecraft.365791.n2.nabble.com/Power-has-disappeared-tp7620735p7620783.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Cleaning a K3

[Josh Fiden]

DI water is the standard, usually in a closed loop system. Most process 
now use water soluble flux. If not, sometimes a wash with addition of 
soap and/or solvent is done prior to the DI water rinsing.


73,
Josh W6XU

On 7/27/2016 11:15 AM, Fred Jensen wrote:

circuit boards used to be washed with distilled water, maybe still are.


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Re: [Elecraft] Cleaning a K3

[Russ]

If you are going to use a compressor, use a moisture/condensate trap like you 
would use with a paint spray gun.
Those air tanks get full of water.  And yes, of course keep the pressure way 
down!!

Russ KD4JO

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John 
Severyn
Sent: Wednesday, July 27, 2016 3:16 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Cleaning a K3

I will second Dick's caution of using any high pressure air or gas.  The high 
flow rates can cause static charge buildup on higher impedance parts, causing 
over-voltage failures.  Keep the flow rate and pressure lowdo not use an 
air compressor hose. The static buildup can happen no matter if the hose is 
conductive or insulating.  The flow of air over the component leads generates a 
static charge.

John  AF6QO


On 7/27/2016 6:56 AM, Richard Fjeld wrote:
> Be careful if using a vacuum cleaner.  A static build-up can develop.  
> I have seen it cause arcing.  That may have been a hose with metal 
> fittings.
> There is also a metal spring inside the hose that can conduct. Perhaps 
> an attachment with a brush for the hose will avoid a discharge.
>
> Dick, n0ce
>
>
> On 7/27/2016 2:07 AM, Bill Frantz wrote:
>> My K3 (and P3) were used in a very dusty environment in eastern 
>> Nevada. Some people there compared the dust levels to those at 
>> burning man. Does anyone have any advice about cleaning the equipment?
>>
>> 73 Bill AE6JV
>>
>> -
>> --
>>
>> Bill Frantz| Re: Computer reliability, performance, and 
>> security:
>> 408-356-8506   | The guy who *is* wearing a parachute is *not* the
>> www.pwpconsult.com | first to reach the ground.  - Terence Kelly
>>
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Re: [Elecraft] Power has disappeared

[Bill Conkling]

Couple questions:

1) What radio, K3 or K3S, or K2/100?

2) which antenna, 1 or 2?

3) You said you turned the “temps down to a more reasonable 23C…”  I don’t 
recall a temp setting, only a REF to current room temperature calibration step.

4) What is the voltage shown on the front panel display?

…billc nr4c



> On Jul 27, 2016, at 11:52 AM, Richard Fjeld  wrote:
> 
> I apologize for this, but being it's a new rig it has to be said; could there 
> be any confusion in the antenna jack selection?
> I haven't followed how it is equipped.
> 
> Dick, n0ce
> 
> 
> On 7/26/2016 7:48 PM, Chris Kimball wrote:
>> I'm a new owner and all worked fine.  After an absence of a few days I came
>> back to no power out, or , at least, very little.
>> 
>> Rig is the 100W version with ATU working into a dummy load.  In CW mode
>> adjusting the power level to 70W produces only a one segment power out.
>> Running the ATU produces a 5W indication, the usual searching rumbling, but
>> no resultant SWR. The Test mode is NOT in operation.
>> 
>> I have restored to the last working config via K3 Utility, but suspect I
>> must have "hit" something to limit the power.  The FP and AMP temps were too
>> high (35C) when the problem was noticed. I set them down to a more
>> reasonable 23C without effect. Input voltage is 12.8V.
>> 
>> Probably something trivial, but suggestions would be appreciated.
>> 
>> Chris
>> NQ8Z
>> 
>> 
>> 
>> 
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Re: [Elecraft] Cleaning a K3

[John Severyn]

I will second Dick's caution of using any high pressure air or gas.  The 
high flow rates can cause static charge buildup on higher impedance 
parts, causing over-voltage failures.  Keep the flow rate and pressure 
lowdo not use an air compressor hose. The static buildup can happen 
no matter if the hose is conductive or insulating.  The flow of air over 
the component leads generates a static charge.

John  AF6QO


On 7/27/2016 6:56 AM, Richard Fjeld wrote:
> Be careful if using a vacuum cleaner.  A static build-up can develop.  
> I have seen it cause arcing.  That may have been a hose with metal 
> fittings.
> There is also a metal spring inside the hose that can conduct. Perhaps 
> an attachment with a brush for the hose will avoid a discharge.
>
> Dick, n0ce
>
>
> On 7/27/2016 2:07 AM, Bill Frantz wrote:
>> My K3 (and P3) were used in a very dusty environment in eastern 
>> Nevada. Some people there compared the dust levels to those at 
>> burning man. Does anyone have any advice about cleaning the equipment?
>>
>> 73 Bill AE6JV
>>
>> --- 
>>
>> Bill Frantz| Re: Computer reliability, performance, and 
>> security:
>> 408-356-8506   | The guy who *is* wearing a parachute is *not* the
>> www.pwpconsult.com | first to reach the ground.  - Terence Kelly
>>
>> __
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>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to rpfj...@outlook.com
>

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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Art Hejduk]

Although I really like using a panadapter, which I made from a Softrock
Lite II for $21.00 and an external USB sound card for about $50.00, it was
a lot of fun using my K1 during a recent NAQCC sprint.  Panadapters are
nice, but not absolutely necessary in my opinion.

73, Art  WB8ENE

On Wed, Jul 27, 2016 at 12:21 PM, Clay Autery  wrote:

> Never used an LP-Pan, but it appears to be a sweet instrument and lots
> of folks like it.
>
> I have a P3 w/ SVGA option (will add TXMON soon).
>
> IMHO, a panadapter is no longer optional.  I use it every time I am on
> the radio...  regardless of the band.
>
> I use it to monitor a band segment when running a net.  Use it to find
> signals when DXing, et al.  Use it for weak signal work (the screen is
> better than my ears).
>
> Use it for all kinds of stuff...
>
> __
> Clay Autery, KY5G
> MONTAC Enterprises
> (318) 518-1389
>
> On 7/27/2016 10:05 AM, knowk...@verizon.net wrote:
> > Greetings,
> >
> > I have yet to be convinced I need a panadapter for HF but its use for
> weak signal 6m use is what has my attention. That said, I have seen the P3
> and an LP-Pan demonstrated but nothing else. I realize I am probably trying
> to compare apples to oranges but how do these stack up against each other?
> Can anything  besides the P3 be used to point and click for QSY? I think
> the P3 lends itself to my rudimentary comfort level with computers but I do
> have good tech support in my wife. That said, fire away
> >
> > Tnx,
> > Jim, W5QM
>
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Re: [Elecraft] [OT] Off Shore RF amplifiers

[Don Wilhelm]

Rick,

You are correct, an amplifier without low pass filtering will generate 
harmonics - unless it is a *very* expensive instrumentation amplifier - 
you might find one in a test lab, but most likely not in a ham station.


It is not legal to *sell* those kind of amplifiers in the US (and I 
assume many other countries).
However, an amateur can purchase one of these and add his own low pass 
filters and that is entirely legal.
Any amateur radio station in the US must assure that his transmitted 
signal is clean and meets FCC requirements.  The amateur is individually 
responsible for the quality of the signal he transmits.  Anyone who has 
passed his amateur exam should know that.
For that reason, I will not allow my call to be used at Field Day unless 
they also use my transceiver(s).


73,
Don W3FPR

On 7/27/2016 2:21 PM, rick jones via Elecraft wrote:

First of all, I'm NOT entertaining purchasing one, I'm happy with my 100W K3. I've been 
away from the hobby for a while and I'm catching up on a few things. I'm noticing quite a 
few add on amplifiers targeting the portable crowd on the auction site. Most are 
originating from China. Many show an internal picture and I do not see any obvious forms 
of LP filtering. Is it legal to run one of these amps without FCC acceptance? If the 
answer is "no" then is an effort being made to educate people why these amps 
may be causing harm to the airwaves (in the test question pool, for instance)? Hams, 
being a notoriously thrifty lot, may be attracted to the low price but may not be aware 
of, or have the ability to monitor their own signals. I'm not trying to stir up any wars, 
I'm simply curious about the proliferation of cheap equipment of questionable quality 
control and if there has been a noticeable change to the bands over the years.
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Re: [Elecraft] K3 Transmitting CW in SSB mode

[Don Wilhelm]

George,

The K3/K3S does *not* inject an audio tone.
It shifts the transmit carrier by an amount equal to your sidetone pitch.
Lower if you are on LSB and higher if you are on USB.

The effect is the same as adding a tone to a perfectly suppressed 
carrier, but is guaranteed to be clean.


73,
Don W3FPR

On 7/27/2016 2:21 PM, George Kidder wrote:
Another way to look at the use of CW in SSB mode on the K3:  What I 
think the rig does when you hit the key is inject an audio tone at the 
CW offset frequency into the audio chain for the SSB signal.  If all 
is clean and not distorted, the result will be a single RF frequency 
offset from the SSB "carrier", and will be receivable as such by a SSB 
receiver tuned to the SSB carrier frequency.


If the K3/K3S doesn't actually generate an audio tone, it sure behaves 
like it.


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Re: [Elecraft] K3 Transmitting CW in SSB mode

[George Kidder]

Another way to look at the use of CW in SSB mode on the K3:  What I 
think the rig does when you hit the key is inject an audio tone at the 
CW offset frequency into the audio chain for the SSB signal.  If all is 
clean and not distorted, the result will be a single RF frequency offset 
from the SSB "carrier", and will be receivable as such by a SSB receiver 
tuned to the SSB carrier frequency.


If the K3/K3S doesn't actually generate an audio tone, it sure behaves 
like it.


George, W3HBM


On 7/26/2016 12:55 PM, Phil Hystad wrote:

Don (and others who answered):

Thanks.  I was guessing that the answer to the second question (CW mode TX  —> 
SSB RX) was as you said but entirely confident.

So, given what you are saying on sending CW while in SSB mode, the K3 does the 
following things:

1.  Allows CW to be sent in SSB mode (enabled or disabled).
2.  Shifts the actual TX frequency by side-tone monitor frequency per LSB/USB 
direction.

Therefore, given that the RX station is receiving at the same dial VFO 
frequency reading, they will
hear a tone roughly equivalent to the tone determined by my side-tone 
frequency.  Of course,
assuming they are the same LSB or USB as I am.

As someone else said — “why don’t all transceiver vendors do the same and 
support this feature”.

73, phil, K7PEH



On Jul 26, 2016, at 5:30 AM, Don Wilhelm  wrote:

Phil,

With CW+SSB turned on, SSB will be sent at the carrier frequency indicated on 
the VFO.
When CW  is sent, the frequency is shifted by the amount of your sidetone 
pitch, so the receiving station will hear a pitch equal to your sidetone pitch.

Note that for normal CW, the signal frequency is the same as indicated on the 
VFO, i.e. it is different in CW+SSB.

If you are sending in CW mode and the receiving station is listening in SSB - 
and both VFOs are tuned to the same frequency, they will hear nothing because 
their receiver will likely not hear a signal at the carrier frequency - that 
does assume that both stations VFOs are calibrated properly.

73,
Don W3FPR

On 7/25/2016 11:34 PM, Phil Hystad wrote:

I have my K3 enabled to allow the sending of CW in SSB mode.  However, I am not 
sure how this actually works.  Therefore, this question.

If the K3 VFO is dialed into 3850 KHz (for example) and the mode is set to SSB 
and my sidetone monitor of the CW signal is set to 700 Hz (not sure if this 
matters), what will the other station here if I send something in CW while in 
SSB mode on my K3.  In particular:

1.  They are also dialed into the same frequency 3850 KHz, what will they hear: 
a tone of 700 Hz, a tone of some other audio frequency, or no tone at all.  My 
only assumption is that they are in SSB mode and dialed to the same frequency 
as I am.


2.  They (the other station) are dialed into the same frequency of 3850 but 
their mode is CW and not SSB while my mode in sending is still SSB.  Same 
questions, what will they hear?



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Re: [Elecraft] Cleaning a K3

[Clay Autery]

99% Isopropyl alcohol is the approved solvent for getting flux, et al
off boards...  It evaps rapidly and is water soluble...

__
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MONTAC Enterprises
(318) 518-1389

On 7/27/2016 1:15 PM, Fred Jensen wrote:
> My S3-line acquired a chronic case of creeping fungus on the chassis
> while packed up and stored in the Philippines for 4 years.  Returning
> home, I took it to the DIY car wash a couple of times and then dried
> it in the sun.  Seemed to work really well, except for the fungi
> living in the IF cans.  YMMV, I won't be doing that to my K3 however.
>
> I'd be real wary of any kind of solvent(s), circuit boards used to be
> washed with distilled water, maybe still are.  Here in No NV, our
> humidity runs in the single digits in the summer, things dry in the
> sun very fast.
>
> 73,
>
> Fred K6DGW
> Sparks NV
> Washoe County DM09dn
>
> On 7/27/2016 9:16 AM, Clay Autery wrote:
>
>> NOT recommending this because it requires a great deal of
>> care/experience, but I, as my OCD dictates, also clean individual
>> circuit boards with 99% alcohol followed by hot water.  Water is bad
>> juju in the wrong places and you absolutely MUST make sure that it is
>> all removed (I use elevated temps in a low humidity environment) prior
>> to reinstallation.
>
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[Elecraft] [OT] Off Shore RF amplifiers

[rick jones via Elecraft]

First of all, I'm NOT entertaining purchasing one, I'm happy with my 100W K3. 
I've been away from the hobby for a while and I'm catching up on a few things. 
I'm noticing quite a few add on amplifiers targeting the portable crowd on the 
auction site. Most are originating from China. Many show an internal picture 
and I do not see any obvious forms of LP filtering. Is it legal to run one of 
these amps without FCC acceptance? If the answer is "no" then is an effort 
being made to educate people why these amps may be causing harm to the airwaves 
(in the test question pool, for instance)? Hams, being a notoriously thrifty 
lot, may be attracted to the low price but may not be aware of, or have the 
ability to monitor their own signals. I'm not trying to stir up any wars, I'm 
simply curious about the proliferation of cheap equipment of questionable 
quality control and if there has been a noticeable change to the bands over the 
years. 
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Re: [Elecraft] Cleaning a K3

[Fred Jensen]

My S3-line acquired a chronic case of creeping fungus on the chassis 
while packed up and stored in the Philippines for 4 years.  Returning 
home, I took it to the DIY car wash a couple of times and then dried it 
in the sun.  Seemed to work really well, except for the fungi living in 
the IF cans.  YMMV, I won't be doing that to my K3 however.


I'd be real wary of any kind of solvent(s), circuit boards used to be 
washed with distilled water, maybe still are.  Here in No NV, our 
humidity runs in the single digits in the summer, things dry in the sun 
very fast.


73,

Fred K6DGW
Sparks NV
Washoe County DM09dn

On 7/27/2016 9:16 AM, Clay Autery wrote:


NOT recommending this because it requires a great deal of
care/experience, but I, as my OCD dictates, also clean individual
circuit boards with 99% alcohol followed by hot water.  Water is bad
juju in the wrong places and you absolutely MUST make sure that it is
all removed (I use elevated temps in a low humidity environment) prior
to reinstallation.


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Re: [Elecraft] Power has disappeared, additional info, part 2.

[Joe Subich, W4TV]

The relative currents indicate little if any drive.  I would begin to
suspect a failure in the predriver.

> I'll contact Elecraft to see what they recommend.

I think that's your best bet given the symptoms and the fact that you
have a week old factory assembled rig.

73,

   ... Joe, W4TV

On 7/27/2016 10:41 AM, Chris Kimball wrote:



Alas, I don't have a wattmeter in the shack. So I can't answer Joe's
question 1.

The current drains are:

Receive: 1.02
Transmit 10W:  2.74
Transmit 50W:  2.73

The rig is factory built and arrived only last week.  I've never opened it
up as I have no static protection gear. The rig doesn't rattle, however.

I'll contact Elecraft to see what they recommend.




--
View this message in context: 
http://elecraft.365791.n2.nabble.com/Power-has-disappeared-tp7620735p7620756.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Michael Murphy]

I love my P3.  I've been a ham for 36 years (active for all of them).

I've had my P3 for over a year and a half and simply don't know how I ever
lived without it.

Mike - KI8R

On Wed, Jul 27, 2016 at 11:30 AM, Ramon Tristani 
wrote:

> Jim:
>
> How can you enjoy a radio without a pan adapter or spectrum display
> nowadays? After using the P3 for close to six years, I would never even
> consider a radio without something  with that functionality. Still thinking
> about it? Hello, just don’t think anymore. Just use the plastic and enjoy
> ham radio again!
>
>
> Ramón E. Tristani Sr. NQ9V
> r.trist...@gmail.com 
> https://www.flickr.com/photos/nq9v/ 
>
>
>
>
>
> > On Jul 27, 2016, at 11:05 AM, knowk...@verizon.net wrote:
> >
> >
> > Greetings,
> >
> > I have yet to be convinced I need a panadapter for HF but its use for
> weak signal 6m use is what has my attention. That said, I have seen the P3
> and an LP-Pan demonstrated but nothing else. I realize I am probably trying
> to compare apples to oranges but how do these stack up against each other?
> Can anything  besides the P3 be used to point and click for QSY? I think
> the P3 lends itself to my rudimentary comfort level with computers but I do
> have good tech support in my wife. That said, fire away
> >
> > Tnx,
> > Jim, W5QM
> >
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-- 
---
*Michael Murphy - KI8R*

m...@ki8r.com

www.ki8r.com

*614-371-8265 (cell)*

---
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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Wes Stewart]

When I was trying to work my friend Ned, AA7A, operating RTTY at VP8STI I was 
looking for his pattern.  It took about an hour to figure out that he didn't 
have one! I finally stuck to one frequency and he eventually found me.


When I saw him later I mentioned it and he confirmed that after each QSO he just 
randomly moved the dial.


On 7/27/2016 9:10 AM, brian wrote:


DXpeditions have been impacted negatively.  They can't listen on the same 
frequency for more than one or two QSO's.  That frequency becomes a wall of 
unreadable stations.  Thus they move their receive frequency between QSO's.  
Finding that pattern is really hard without a panadapter.


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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Wes Stewart]

I use an SDR-IQ and SpectraVue software* to look at the K3 IF output. The 
software has a K3 interface option built in that knows all of the frequency 
offsets between modes and tracks the K3 center frequency perfectly and 
seamlessly.  You can tune the K3 with the mouse wheel or point and click.  
Theoretically it can be used as a second RX, however latency might be 
disconcerting, at least it is to me.  But I don't have a second RX in the K3 
either since I have a hard enough job listening to one frequency without trying 
two :-)


The SDR-IQ has been discontinued but used ones still show up. (~$350-$400)  
There is a higher priced replacement but I can't speak to that one. The P3 crowd 
will argue that my approach requires a computer (and a USB port), but who 
doesn't already use one for logging anyway?  I run LP-Bridge to share the USB 
port with the SDR, K3, logging program, MMTTY, etc.


A secondary benefit is that the SDR-IQ makes a decent (but not stellar) 
standalone RX and can be used (with care) as a very accurate spectrum analyzer.  
I used my second one to measure the TX IMD of both my K3 and K3S. My data 
correlated with Elecraft's to within a dB or less.


* There is other SDR programs out there and I've tried most of them but I'm 
sorry, the authors of the other packages simply don't think like real people do 
and I find them simply awful.


Wes  N7WS


On 7/27/2016 8:05 AM, knowk...@verizon.net wrote:

Greetings,

I have yet to be convinced I need a panadapter for HF but its use for weak 
signal 6m use is what has my attention. That said, I have seen the P3 and an 
LP-Pan demonstrated but nothing else. I realize I am probably trying to compare 
apples to oranges but how do these stack up against each other? Can anything  
besides the P3 be used to point and click for QSY? I think the P3 lends itself 
to my rudimentary comfort level with computers but I do have good tech support 
in my wife. That said, fire away

Tnx,
Jim, W5QM

_


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Re: [Elecraft] Elecraft grey in a rattle can?

[len]

A few years ago I had Superior Paint Supply in SLC make me a rattle-can of
paint that matched the front panel on a PDP11 that I was restoring.  As I
recall it wasn't more than 20 or 30$.  I also bought two types primers, one
etching and one non-etching.  I was really happy with the result.  The color
match was perfect.

YMMV

Len


Subject: Re: [Elecraft] Elecraft grey in a rattle can?

Hey, while we are at it, would one of those hand-held electric sprayers 
work well enough to spray that Paint?

Dick, n0ce


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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Ian White]

The P3 is excellent for HF but its "point and click" facility is far too
slow to catch fleeting openings on 6m. 

To keep watch on the 6m beacons, CW and SSB requires a frequency span of
at least 200kHz - and wherever a station may appear, you need to jump
onto that frequency *immediately*. For a 6m DXer, that is the practical
test case.

A mouse can point-and-click accurately at the opposite side of the
screen within 2-3 seconds, almost independent of the size of the jump.
If a station is calling CQ and you're using a mouse, you can probably
arrive in time to catch the callsign - so if it's a new one, you can be
the first to answer. But the P3 requires a button-press before you can
even begin to twiddle the small knob, and then it takes at least an
order of magn... oh never mind, the station's gone. The P3 fails that
practical test by a wide margin. 

Having suffered that scenario too many times, when I purchased a second
K3 for use mostly at VHF I decided not to buy either a P3 or a KRX3.
There are far better possibilities using conventional SDRs with computer
displays that have the *true* point-and-click facility.

After some experimentation the 2m station now uses an SDR at the
transverter IF, 28MHz, which is where the front-end gain and SNR are the
highest (the SNR at the K3 IF port is not as good, which is very
noticeable with weak signals). The SDR-IQ, Funcube Dongle Pro+ and
SDRplay all gave comparably good waterfall displays but the SDRplay has
the major advantage that the frequency span can be expanded beyond the
more usual limit of 192kHz. For example, European VHF/UHF contests
require 250kHz for full coverage - and those extra kHz are important,
because stations do spread out to the extreme edges of the range. 

Integration with logging software is obviously vital. At present I am
using Eterlogic's VSPE port emulator to provide a additional USB links
to the HDSDR program and to N1MM+. HDSDR offers the valuable option of
the Winrad waterfall palette which is specifically optimized for finding
weak signals, and it automatically recognises the K3's transverter
offset and allows single-click QSY of either VFO A or VFO B. If HDSDR is
linked to VFO B, the K3's VFO B knob can then be used to tune the SDR.
All the other functions of the K3 remain unaffected, so the SDR is
effectively behaving as a second receiver. A simple switch allows the
audio output from HDSDR to be fed into the RH earphone, effectively
replacing the KRX3 for SO2V operation. Meanwhile N1MM+ automatically
keeps track of all events, and can provide voice and CW keying in the
normal way.   

This setup is still in the experimental stage, not yet ready for a full
cookbook description, but it is showing geat promise. None of this is
new, but it was new to me  (special thanks to GM4JJJ for pointing me in
the right direction and making it click). Above all, it does seem to
meet the *practical* requirements for VHF/UHF DXing and contesting.


73 from Ian GM3SEK


>-Original Message-
>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>knowk...@verizon.net
>Sent: 27 July 2016 16:05
>To: elecraft@mailman.qth.net
>Subject: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?
>
>
>Greetings,
>
>I have yet to be convinced I need a panadapter for HF but its use for
weak
>signal 6m use is what has my attention. That said, I have seen the P3
and an
>LP-Pan demonstrated but nothing else. I realize I am probably trying to
>compare apples to oranges but how do these stack up against each other?
>Can anything  besides the P3 be used to point and click for QSY? I
think the
>P3 lends itself to my rudimentary comfort level with computers but I do
>have good tech support in my wife. That said, fire away
>
>Tnx,
>Jim, W5QM
>
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>Message delivered to gm3...@ifwtech.co.uk

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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Clay Autery]

Never used an LP-Pan, but it appears to be a sweet instrument and lots
of folks like it.

I have a P3 w/ SVGA option (will add TXMON soon).

IMHO, a panadapter is no longer optional.  I use it every time I am on
the radio...  regardless of the band.

I use it to monitor a band segment when running a net.  Use it to find
signals when DXing, et al.  Use it for weak signal work (the screen is
better than my ears).

Use it for all kinds of stuff...

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/27/2016 10:05 AM, knowk...@verizon.net wrote:
> Greetings,
>
> I have yet to be convinced I need a panadapter for HF but its use for weak 
> signal 6m use is what has my attention. That said, I have seen the P3 and an 
> LP-Pan demonstrated but nothing else. I realize I am probably trying to 
> compare apples to oranges but how do these stack up against each other? Can 
> anything  besides the P3 be used to point and click for QSY? I think the P3 
> lends itself to my rudimentary comfort level with computers but I do have 
> good tech support in my wife. That said, fire away
>
> Tnx,
> Jim, W5QM

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Re: [Elecraft] Cleaning a K3

[Clay Autery]

Cleaning a REALLY dusty unit is always better to VACUUM with a static
protected unit with a HEPA filter FIRST...  Then, blow out what you
can't reach with a vacuum second (outside), preferably with the chassis
completely open.

NOT recommending this because it requires a great deal of
care/experience, but I, as my OCD dictates, also clean individual
circuit boards with 99% alcohol followed by hot water.  Water is bad
juju in the wrong places and you absolutely MUST make sure that it is
all removed (I use elevated temps in a low humidity environment) prior
to reinstallation.

Just depends on how much time/energy you want to put into it and you
level of care.

73,

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/27/2016 8:56 AM, Richard Fjeld wrote:
> Be careful if using a vacuum cleaner.  A static build-up can develop. 
> I have seen it cause arcing.  That may have been a hose with metal
> fittings.
> There is also a metal spring inside the hose that can conduct. Perhaps
> an attachment with a brush for the hose will avoid a discharge.
>
> Dick, n0ce
>
>
> On 7/27/2016 2:07 AM, Bill Frantz wrote:
>> My K3 (and P3) were used in a very dusty environment in eastern
>> Nevada. Some people there compared the dust levels to those at
>> burning man. Does anyone have any advice about cleaning the equipment?
>>
>> 73 Bill AE6JV
>>
>> ---
>>
>> Bill Frantz| Re: Computer reliability, performance, and
>> security:
>> 408-356-8506   | The guy who *is* wearing a parachute is *not* the
>> www.pwpconsult.com | first to reach the ground.  - Terence Kelly
>>
>> __
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>

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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Richard Fjeld]

Not all pan-adapters are created equal.  Some suggestions;

Compare the images of one to another.

Look for images that are sluggish and exhibit a delay between what is 
heard and what is seen due to the computer involved.


Also look for false images that are mirrored, etc.  (That may take 
experience to notice.)  The same image may be appearing in more than one 
place on the band at the same time.  Best done at the widest bandwidth 
setting.


Compare the bandwidth capability of the various units.

Compare the features included in the various units.

Compare the ease of operation.

Dick, n0ce


On 7/27/2016 10:39 AM, Guy Olinger K2AV wrote:

Absolutely agree with Stewart. 73, Guy K2AV.

On Wednesday, July 27, 2016, Stewart Bryant  wrote:



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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[brian]

Premise: It is more enjoyable working them than not-- the quicker the 
better.


Let's face it DXing is a competitive undertaking.  Besides power and 
antenna dB's, there is another "space race" war going on.


Technology has equipped many station with panadapters of some sort.
They have proved so useful that those without them are at a huge 
disadvantage.


So to stay even with the crowd, one almost has to have one.

DXpeditions have been impacted negatively.  They can't listen on the 
same frequency for more than one or two QSO's.  That frequency becomes a 
wall of unreadable stations.  Thus they move their receive frequency 
between QSO's.  Finding that pattern is really hard without a 
panadapter.


Don't shoot the messenger.

73 de Brian/K3KO


On 7/27/2016 15:30 PM, Ramon Tristani wrote:

Jim:

How can you enjoy a radio without a pan adapter or spectrum display nowadays? 
After using the P3 for close to six years, I would never even consider a radio 
without something  with that functionality. Still thinking about it? Hello, 
just don’t think anymore. Just use the plastic and enjoy ham radio again!


Ramón E. Tristani Sr. NQ9V
r.trist...@gmail.com 
https://www.flickr.com/photos/nq9v/ 






On Jul 27, 2016, at 11:05 AM, knowk...@verizon.net wrote:


Greetings,

I have yet to be convinced I need a panadapter for HF but its use for weak 
signal 6m use is what has my attention. That said, I have seen the P3 and an 
LP-Pan demonstrated but nothing else. I realize I am probably trying to compare 
apples to oranges but how do these stack up against each other? Can anything  
besides the P3 be used to point and click for QSY? I think the P3 lends itself 
to my rudimentary comfort level with computers but I do have good tech support 
in my wife. That said, fire away

Tnx,
Jim, W5QM

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Re: [Elecraft] Power has disappeared

[Richard Fjeld]

I apologize for this, but being it's a new rig it has to be said; could 
there be any confusion in the antenna jack selection?

I haven't followed how it is equipped.

Dick, n0ce


On 7/26/2016 7:48 PM, Chris Kimball wrote:

I'm a new owner and all worked fine.  After an absence of a few days I came
back to no power out, or , at least, very little.

Rig is the 100W version with ATU working into a dummy load.  In CW mode
adjusting the power level to 70W produces only a one segment power out.
Running the ATU produces a 5W indication, the usual searching rumbling, but
no resultant SWR. The Test mode is NOT in operation.

I have restored to the last working config via K3 Utility, but suspect I
must have "hit" something to limit the power.  The FP and AMP temps were too
high (35C) when the problem was noticed. I set them down to a more
reasonable 23C without effect. Input voltage is 12.8V.

Probably something trivial, but suggestions would be appreciated.

Chris
NQ8Z





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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Ramon Tristani]

Jim:

How can you enjoy a radio without a pan adapter or spectrum display nowadays? 
After using the P3 for close to six years, I would never even consider a radio 
without something  with that functionality. Still thinking about it? Hello, 
just don’t think anymore. Just use the plastic and enjoy ham radio again!


Ramón E. Tristani Sr. NQ9V
r.trist...@gmail.com 
https://www.flickr.com/photos/nq9v/ 





> On Jul 27, 2016, at 11:05 AM, knowk...@verizon.net wrote:
> 
> 
> Greetings,
> 
> I have yet to be convinced I need a panadapter for HF but its use for weak 
> signal 6m use is what has my attention. That said, I have seen the P3 and an 
> LP-Pan demonstrated but nothing else. I realize I am probably trying to 
> compare apples to oranges but how do these stack up against each other? Can 
> anything  besides the P3 be used to point and click for QSY? I think the P3 
> lends itself to my rudimentary comfort level with computers but I do have 
> good tech support in my wife. That said, fire away
> 
> Tnx,
> Jim, W5QM
> 
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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Guy Olinger K2AV]

Absolutely agree with Stewart. 73, Guy K2AV.

On Wednesday, July 27, 2016, Stewart Bryant  wrote:

>
>
> On 27/07/2016 16:05, knowk...@verizon.net wrote:
>
>> I have yet to be convinced I need a panadapter for HF
>>
>
> It is very useful for search and pounce operation in contests, and for
> finding a slot to call CQ. It is also useful for understanding the shape of
> a DX pileup.
>
> I find that it helps build a mental picture of the band that I was never
> able to do simply by listening. Having owned one together with the VGA
> adapter, I would be very reluctant to go back to ears only operating on any
> band.
>
>  - Stewart/G3YSX
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Re: [Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[Stewart Bryant]

On 27/07/2016 16:05, knowk...@verizon.net wrote:

I have yet to be convinced I need a panadapter for HF


It is very useful for search and pounce operation in contests, and for 
finding a slot to call CQ. It is also useful for understanding the shape 
of a DX pileup.


I find that it helps build a mental picture of the band that I was never 
able to do simply by listening. Having owned one together with the VGA 
adapter, I would be very reluctant to go back to ears only operating on 
any band.


 - Stewart/G3YSX
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[Elecraft] comparing P3, LP-Pan, SDRPlay, others?

[knowkode]

Greetings,

I have yet to be convinced I need a panadapter for HF but its use for weak 
signal 6m use is what has my attention. That said, I have seen the P3 and an 
LP-Pan demonstrated but nothing else. I realize I am probably trying to compare 
apples to oranges but how do these stack up against each other? Can anything  
besides the P3 be used to point and click for QSY? I think the P3 lends itself 
to my rudimentary comfort level with computers but I do have good tech support 
in my wife. That said, fire away

Tnx,
Jim, W5QM

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Re: [Elecraft] Power has disappeared, additional info, part 2.

[Chris Kimball]

Alas, I don't have a wattmeter in the shack. So I can't answer Joe's
question 1.

The current drains are:

Receive: 1.02
Transmit 10W:  2.74
Transmit 50W:  2.73

The rig is factory built and arrived only last week.  I've never opened it
up as I have no static protection gear. The rig doesn't rattle, however.

I'll contact Elecraft to see what they recommend.




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Re: [Elecraft] Cleaning a K3

[Richard Fjeld]

Be careful if using a vacuum cleaner.  A static build-up can develop.  I 
have seen it cause arcing.  That may have been a hose with metal fittings.
There is also a metal spring inside the hose that can conduct. Perhaps 
an attachment with a brush for the hose will avoid a discharge.


Dick, n0ce


On 7/27/2016 2:07 AM, Bill Frantz wrote:
My K3 (and P3) were used in a very dusty environment in eastern 
Nevada. Some people there compared the dust levels to those at burning 
man. Does anyone have any advice about cleaning the equipment?


73 Bill AE6JV

--- 


Bill Frantz| Re: Computer reliability, performance, and security:
408-356-8506   | The guy who *is* wearing a parachute is *not* the
www.pwpconsult.com | first to reach the ground.  - Terence Kelly

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--
In this dedication of a Nation we humbly ask the blessing of God.
May He protect each and every one of us. May He guide me in the days to come.
(From Franklin Delano Rosevelt's inaugural address 3/4/33)

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Re: [Elecraft] Power has disappeared, additional info, part 3.

[Chris Kimball]

K6MKF suggested I run the Calibrate Transmitter Gain function from K3
Utility. The rig failed at both the 5 and 50W levels because the output was
inadequate.  I think it may be a hardware problem.

Operator ineptitude is still a possibility!



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Re: [Elecraft] Power has disappeared, additional info, part 2.

[Joe Subich, W4TV]

Have you tried an external wattmeter to check for power output?

When you make your tests, have you looked at the current draw (use the
internal current measuring capability)?  What is the current with the
rig set to high power (100W) and low power (10W)?

Have you checked the hardware on the low power amplifier (motherboard
and bottom cover)?

Question 1 is an attempt to determine if the internal wattmeter has
failed.

Question 2 is an attempt to determine if the 8.12 MHz (IF) trap has
opened.

Question 3 leads to the possibility that the pre-driver has failed
because of insufficient heat sinking (loose hardware).

If your rig started life as a 10W radio and you have the PA jumper
board, I would also recommend removing the KPA3/switching board
and installing the jumper to conduct low power tests.

Beyond this, I suspect you should be contacting k3supp...@elecraft.com
to arrange for factory support/return for diagnosis/repair.

73,

   ... Joe, W4TV


On 7/27/2016 9:29 AM, Chris Kimball wrote:

Thanks for the comments.

The rig is NOT in the TEST mode, that is, the display TX is not flashing.
Holding the TEST mode produces informative messages in the VFO B area both
on turn on and turn off.  I'm not certain that the TEST mode produces ANY
indication at all in the RF scale.

I've bypassed both the KPAT and KAT and set the power to 10W.  Into a dummy
load I still get just one segment in the RF output, the segment being about
twice the width of the end tick on the RF scale.  There is a distinctive
click in going below 13W output.

The rig has only 1 receiver and that receiver has the general coverage
option. I've tried operating on 80, 40, and 20m with the same no-output
result.

Just reloaded the latest firmware with K3 Utility. No change in RF output,
unfortunately.



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Re: [Elecraft] Power has disappeared, additional info, part 2.

[Chris Kimball]

Thanks for the comments. 

The rig is NOT in the TEST mode, that is, the display TX is not flashing. 
Holding the TEST mode produces informative messages in the VFO B area both
on turn on and turn off.  I'm not certain that the TEST mode produces ANY
indication at all in the RF scale.

I've bypassed both the KPAT and KAT and set the power to 10W.  Into a dummy
load I still get just one segment in the RF output, the segment being about
twice the width of the end tick on the RF scale.  There is a distinctive
click in going below 13W output.

The rig has only 1 receiver and that receiver has the general coverage
option. I've tried operating on 80, 40, and 20m with the same no-output
result.

Just reloaded the latest firmware with K3 Utility. No change in RF output,
unfortunately.



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Re: [Elecraft] KX-2 well alrighty then!

[w5sum]

Dayton is on the list for next year!

Jim GM  wrote:

>That’s just great!
>
>Next thing to do is to work on getting her to say Go with the guys to Dayton 
>and buy what ever you want! 
>
>Cheers 
>
>Jim K9TF
>
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Re: [Elecraft] Power has disappeared, additional info.

[Barry Simpson]

Hi Chris

It sounds as if you have put the rig into Test mode - the middle button on
the far left of the front panel.

Barry  VK2BJ

On 27 July 2016 at 21:34, Chris Kimball  wrote:

> Thanks to all who responded.  Alas, the problem continues.
>
> Let me respond to the queries to date:
>
> 1. The rig is a recent K3S (100W).
> 2. The KPAT is on, "PA nor".
> 3. The circuit breaker seems fine.  No red showing on button, button feels
> loose.
> 4. Operation is into a dummy load, without wattmeter.
>
> I've tried using the TUNE button, setting the TUN PWR level to 20W. On
> pushing TUNE, the panel says 0 W, even though it was set to 20W.
>
> In CW mode, the ALC shows reasonable ALC movement on CW sending.  RF output
> remains at 1 segment.
>
> Note: No error message has been received of any kind.  All operation, other
> than RF output, is fine.
>
> The last contact I had before leaving on the trip was on SSB just to set up
> the mike. All worked fine on 20 m.  Perhaps I "hit" something in playing
> with SSB.
>
>
>
>
>
> --
> View this message in context:
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Re: [Elecraft] KX-2 well alrighty then!

[Jim GM]

That’s just great!

Next thing to do is to work on getting her to say Go with the guys to Dayton 
and buy what ever you want! 

Cheers 

Jim K9TF

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[Elecraft] Power has disappeared, additional info.

[Chris Kimball]

Thanks to all who responded.  Alas, the problem continues.

Let me respond to the queries to date:

1. The rig is a recent K3S (100W).
2. The KPAT is on, "PA nor".
3. The circuit breaker seems fine.  No red showing on button, button feels
loose.
4. Operation is into a dummy load, without wattmeter.

I've tried using the TUNE button, setting the TUN PWR level to 20W. On
pushing TUNE, the panel says 0 W, even though it was set to 20W.

In CW mode, the ALC shows reasonable ALC movement on CW sending.  RF output
remains at 1 segment.

Note: No error message has been received of any kind.  All operation, other
than RF output, is fine.

The last contact I had before leaving on the trip was on SSB just to set up
the mike. All worked fine on 20 m.  Perhaps I "hit" something in playing
with SSB.





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Re: [Elecraft] Cleaning a K3

[Petr, OK1RP/M0SIS]

Hi Bill,

the same what suggested Vic, the pressed air gun (like reverse-connected
vacuum cleaner tool) to blow the dust out I am using in our company for
rough cleaning of the testing equipment time to time. 

Important things are to protect fans (as Vic mentioned too) from the
over-spining. 

After that when the dust is roughly out I am repeating this step again on
different place (if you did not do it outside for the first time) to blow
the settled residual dust from the all boards.

After all of these steps I am removing the boards one by one and cleaning
the pins and all contact with Isopropyl on the cleaning pad. It takes time
but it will surely pay!

In any case during all of that cleaning procedure I am protecting all LCD
displays and screens with covers (adhesive paper tape) in order to avoid
getting the dust under the plastic covers, glass screens etc. by the high
pressed air gun...

Hope it helps,

73 - Petr, OK1RP



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Re: [Elecraft] Cleaning a K3

[Vic Rosenthal 4X6GP]

I always cleaned computers (I worked for an agricultural software 
company and some of our customers' computers could have had crops 
planted in them) with a reverse-connected vacuum cleaner to blow the 
dust out. This must be done outdoors, of course!
You need to be careful not to spin fans with the air because it's 
possible to damage bearings with excessive RPM.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 27 Jul 2016 10:07, Bill Frantz wrote:
My K3 (and P3) were used in a very dusty environment in eastern 
Nevada. Some people there compared the dust levels to those at burning 
man. Does anyone have any advice about cleaning the equipment?


73 Bill AE6JV



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[Elecraft] Cleaning a K3

[Bill Frantz]

My K3 (and P3) were used in a very dusty environment in eastern 
Nevada. Some people there compared the dust levels to those at 
burning man. Does anyone have any advice about cleaning the equipment?


73 Bill AE6JV

---
Bill Frantz| Re: Computer reliability, performance, and security:
408-356-8506   | The guy who *is* wearing a parachute is 
*not* the

www.pwpconsult.com | first to reach the ground.  - Terence Kelly

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Re: [Elecraft] [KX3] Headphones for KX2/KX3 for Single sided deafness

[Bob Nielsen]

As another ham who is deaf in one ear (although I was in my 50s when it 
happened), I was wondering if I am out of luck when it comes to the dual 
watch function of the KX2.


Bob, N7XY

On 7/26/16 3:50 PM, Don Wilhelm donw...@embarqmail.com [KX3] wrote:


Joe,

I suggest that you are looking at the wrong parameter. Audio folks have
not done "impedance matching" for a long time now.
You should be looking at the SPL ratings for the headphone instead -
that is an indicator of the sensitivity.

The audio amplifier output is a low impedance and will feed as much
power into the connected device (speaker or headphones) as it can take.
Consider a parallel - plugging a lamp into an AC mains receptacle.
The AC Mains receptacle is a low impedance source. If you plug in a 25
watt bulb, it will produce the light of a 25 watt bulb, but if you plug
in a 100 watt bulb, it will produce more light - same low impedance
driving source.

Just guessing here ---
Is it possible that your single headphone has a mono plug on it? If so,
it is shorting out one channel of the KX2 audio. Change it to a stereo
plug with the tip and ring connected together. (caution, wires in
headphones can be difficult to solder, some are nylon fiber wrapped
loosely with copper braid for flexibility).

Alternately, just use a regular set of headphones - yes, you will not
hear one side, but the audio should be better.

73,
Don W3FPR

On 7/26/2016 5:15 PM, kn2a2...@icloud.com [KX3] wrote:
>
> Hi all.
> I have SSD. Born deaf from my left ear.
> Can anyone recommend an affordable headphone that I can use with the
> KX2? I recently purchased a Stanton DJ Pro 300 headphone ( it only has
> one side). It seems that there is a impedance mismatch because I can't
> get a loud output when I use it. It works fine when connected to my
> iPhone or laptop.
> Any suggestions? I can probably cook up a impedance matching circuit
> or just buy a "normal " headphone and call it a day however I like the
> single headset concept.
> Any ideas or suggestions are appreciated.
> Thanks
> Joe KN2A
>
>

__._,_.___

Posted by: Don Wilhelm .

__,_._,___



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