[Elecraft] checking

[Peter Ritter via Elecraft]

Hello.

Please let me know when you get this?

I'd like to ask you something

Thanks
Peter
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Re: [Elecraft] Checking offset of K3 IF filters

[Dave New, N8SBE]

IIRC, the 8-pole filters have no offset, i.e. they are bang on.
So, just set them to 0 and party on!

73,
-- Dave, N8SBE

On 2023-03-03 01:11, Jon Iza wrote:

Folks,
some K3 filters have an offset with respect to the IF central
frequency that the firmware on the rig can compensate. Sometimes the
"offset labels" are gone and poking a zero offset on the configuration
is the only option.

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Re: [Elecraft] Checking offset of K3 IF filters

[Fred Jensen]

That's the method for aligning the K2 filters recommended by Don, 
W3FPR.  It works great for the K2, I don't see why it wouldn't work for 
a K3 also. That's a cool pair of calls too!


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Jon Iza wrote on 3/2/2023 11:11 PM:

Folks,
some K3 filters have an offset with respect to the IF central
frequency that the firmware on the rig can compensate. Sometimes the
"offset labels" are gone and poking a zero offset on the configuration
is the only option.
I guess that feeding noise into the antenna and using an audio
spectrum analyzer may help to visually see the filter response, and
check if that "bell" is centered or shifted.
Am I right? Or is there a better method?
Inquiring minds wanna know.
jon, ea2sn / ae2sn





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[Elecraft] Checking offset of K3 IF filters

[Jon Iza]

Folks,
some K3 filters have an offset with respect to the IF central
frequency that the firmware on the rig can compensate. Sometimes the
"offset labels" are gone and poking a zero offset on the configuration
is the only option.
I guess that feeding noise into the antenna and using an audio
spectrum analyzer may help to visually see the filter response, and
check if that "bell" is centered or shifted.
Am I right? Or is there a better method?
Inquiring minds wanna know.
jon, ea2sn / ae2sn
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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Dave (NK7Z)]

Or paste in "Unformatted text"...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/17/23 13:14, kevin via Elecraft wrote:
If you want to copy and paste from the web it helps to add another step 
to the process.


Paste the selected text into a text processor such as WordPad on a 
Microsoft system or gedit on a Linux system.  Then copy the text again. 
This will eliminate any formatting, fonts, or colors which don't fit 
your email application.


Paste that second copy into your email application and it should look 
much better.


    73,

   Kevin.  KD5ONS


On 2/17/23 13:06, j...@kk9a.com wrote:

Maybe sending the text a third time will work:)



Alan Bloom n1al wrote:


That's weird.  The spaces were there in the sent message - they somehow
disappeared in the reflected copy.;  Let's try again:

CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedfor
performingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortot
heK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses.

TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadua
l-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodu
lardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadig
italvoicerecorder,remotecontrol,andCWdecoder.

TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeatures
adual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoinclu
desabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremote
control.

Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepowero
utput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstilla
capabletransceiver,anddependingontheuser'sneeds,itmaybethebetteroption.

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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Fred Jensen]

Indeed, 3 was the magic number!  Reads like a spec sheet or copy from an 
Elecraft ad.  Heard an interesting program on KUNR [Univ of NV Public 
Radio] the other day interviewing 3 attorneys who specialize in 
copyright/patent infringement cases.  The basic question to them was, 
"If ChatGPT is 'trained' using copyrighted material, mainly from the 
I'net, and it then coughs up answers/dissertations from what it learned, 
is that infringement on all the existing copyrights?"  The 3 didn't 
positively conclude yes or no, but a lot of interesting considerations 
did come up.


In early 1960, while a student at Cal Poly in San Luis Obispo, the Math 
Dept acquired a Bendix G-15D computer.  It resembled a small fridge, 
2,100 or so 29-bit "words" of recirculating drum memory, several gobs of 
dual triode vacuum tubes, a bunch of germanium diodes, paper tape reader 
and punch, and a modified IBM Selectric typewriter.  Fairly cutting edge 
for its time.


Dept. Head asked me and a friend to conjure up something to demonstrate 
it at the annual open house at the University.  We finally came up with 
"Psycho," [math majors aren't always the most creative of folks with 
words] that would answer questions typed on the Selectric.  It wasn't 
very sophisticated ... how much can you do in 2,100 words at 4 
characters per word?  It gave occasional slightly plausible answers to 
questions, but unknown to the visitors, it simply hashed their 
questions, did a little randomizing of the hash, and picked an answer 
from a small canned stash.  We arranged the potential answers to be 
vague, similar to a politician's speech, at least semi-applicable to 
common questions, often evasive, and quite believable if you really 
wanted to believe the fridge next to you with the blinking lights was 
really conversing with you.


To add a twist, you could hypnotize it by typing "sleep" a few times and 
it would then, if told "You are a dog," reply with "I are a dog ... 
woof."  None of the visiting parents had ever seen a computer in 1960, 
and notwithstanding the utter simplicity of the "conversations," most 
appeared convinced the machine had intelligence.  Enough so that a 
couple of psych profs came over to observe the interactions.


I'm sure that OpenAI is using machinery with more than 2,100 words of 
memory.  Nonetheless, in the times I've played with ChatGPT, quite a few 
of the responses often have a "look-up" flavor like the dissertation on 
the K3/K4.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Alan Bloom wrote on 2/17/2023 2:08 PM:

OK, maybe third time's the charm:

Compare an Elecraft K3 with an Elecraft K4.

The Elecraft K3 and Elecraft K4 are both high-end Amateur Radio 
transceivers designed for performing radio operations in both the HF 
and VHF/UHF bands. The K3 is the predecessor to the K4, but both 
models offer top-of-the-line performance for their respective classes.


The K3 is an HF/VHF transceiver that offers up to 100 watts of power 
output. It features a dual-channel receiver, an optional roofing 
filter, and a built-in antenna tuner. It is a modular design, allowing 
users to customize their set up with additional modules, such as a 
digital voice recorder, remote control, and CW decoder.


The K4 is an HF/VHF/UHF transceiver that offers up to 200 watts of 
power output. It features a dual-channel receiver, roofing filters, 
and an integrated antenna tuner. It also includes a built-in digital 
voice recorder and a CW decoder. It also supports an optional remote 
control.


In terms of performance, the K4 is the superior of the two models, as 
it provides more power output, a broader range of frequencies, and 
additional features. However, the K3 is still a capable transceiver, 
and depending on the user’s needs, it may be the better option.




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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Alan Bloom]

On 2/17/23 14:14, kevin via Elecraft wrote:
If you want to copy and paste from the web it helps to add another 
step to the process.


Paste the selected text into a text processor such as WordPad on a 
Microsoft system or gedit on a Linux system.  Then copy the text 
again.  This will eliminate any formatting, fonts, or colors which 
don't fit your email application.


Paste that second copy into your email application and it should look 
much better.


OK, maybe third time's the charm:



Compare an Elecraft K3 with an Elecraft K4.

The Elecraft K3 and Elecraft K4 are both high-end Amateur Radio 
transceivers designed for performing radio operations in both the HF and 
VHF/UHF bands. The K3 is the predecessor to the K4, but both models 
offer top-of-the-line performance for their respective classes.


The K3 is an HF/VHF transceiver that offers up to 100 watts of power 
output. It features a dual-channel receiver, an optional roofing filter, 
and a built-in antenna tuner. It is a modular design, allowing users to 
customize their set up with additional modules, such as a digital voice 
recorder, remote control, and CW decoder.


The K4 is an HF/VHF/UHF transceiver that offers up to 200 watts of power 
output. It features a dual-channel receiver, roofing filters, and an 
integrated antenna tuner. It also includes a built-in digital voice 
recorder and a CW decoder. It also supports an optional remote control.


In terms of performance, the K4 is the superior of the two models, as it 
provides more power output, a broader range of frequencies, and 
additional features. However, the K3 is still a capable transceiver, and 
depending on the user’s needs, it may be the better option.


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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Dave New, N8SBE]

Argh.  I keep forgetting to change my 'from' to the email address I'm 
subscribed to this list as.


Try sending in text, rather than HTML mode, if you can.

73,
-- Dave, N8SBE

On 2023-02-17 14:51, Alan Bloom wrote:

On 2/17/23 12:48, Dave New, N8SBE wrote:

Alan,

For starters where are all the spaces? :-)  Makes it hard to read, 
that's for sure.


That's weird.  The spaces were there in the sent message - they
somehow disappeared in the reflected copy.;  Let's try again:

CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedforperformingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortotheK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses.

TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadual-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodulardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadigitalvoicerecorder,remotecontrol,andCWdecoder.

TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeaturesadual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoincludesabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremotecontrol.

Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepoweroutput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstillacapabletransceiver,anddependingontheuser’sneeds,itmaybethebetteroption.
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Re: [Elecraft] Checking out Elecraft on ChatGPT

[kevin via Elecraft]

If you want to copy and paste from the web it helps to add another step 
to the process.


Paste the selected text into a text processor such as WordPad on a 
Microsoft system or gedit on a Linux system.  Then copy the text again.  
This will eliminate any formatting, fonts, or colors which don't fit 
your email application.


Paste that second copy into your email application and it should look 
much better.


   73,

  Kevin.  KD5ONS


On 2/17/23 13:06, j...@kk9a.com wrote:

Maybe sending the text a third time will work:)



Alan Bloom n1al wrote:


That's weird.  The spaces were there in the sent message - they somehow
disappeared in the reflected copy.;  Let's try again:

CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedfor
performingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortot
heK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses.

TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadua
l-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodu
lardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadig
italvoicerecorder,remotecontrol,andCWdecoder.

TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeatures
adual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoinclu
desabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremote
control.

Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepowero
utput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstilla
capabletransceiver,anddependingontheuser'sneeds,itmaybethebetteroption.

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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Fred Jensen]

Chances are high that they really weren't ASCII space characters.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Alan Bloom wrote on 2/17/2023 12:51 PM:



On 2/17/23 12:48, Dave New, N8SBE wrote:

Alan,

For starters where are all the spaces? :-)  Makes it hard to read, 
that's for sure.


That's weird.  The spaces were there in the sent message - they 
somehow disappeared in the reflected copy.;  Let's try again:


CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedforperformingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortotheK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses. 



TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadual-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodulardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadigitalvoicerecorder,remotecontrol,andCWdecoder. 



TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeaturesadual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoincludesabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremotecontrol. 



Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepoweroutput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstillacapabletransceiver,anddependingontheuser’sneeds,itmaybethebetteroption. 


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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Rick NK7I]

The old CW traffic handler gag was "Having a great time.  Wish you were 
her(e)" with the final dit, missed.


73,
Rick nk7i


On 2/17/2023 12:50 PM, Dale Boresz wrote:

Unfortunately, there are a lot of missing spaces on the CW bands too.

73,
Dale - WA8SRA

On Fri, Feb 17, 2023 at 2:49 PM Dave New, N8SBE  wrote:


Alan,

For starters where are all the spaces? :-)  Makes it hard to read,
that's for sure.

...
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Re: [Elecraft] Checking out Elecraft on ChatGPT

[john]

Maybe sending the text a third time will work:)



Alan Bloom n1al wrote:


That's weird.  The spaces were there in the sent message - they somehow 
disappeared in the reflected copy.;  Let's try again:

CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedfor
performingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortot
heK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses.

TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadua
l-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodu
lardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadig
italvoicerecorder,remotecontrol,andCWdecoder.

TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeatures
adual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoinclu
desabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremote
control.

Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepowero
utput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstilla
capabletransceiver,anddependingontheuser'sneeds,itmaybethebetteroption.

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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Alan Bloom]

On 2/17/23 12:48, Dave New, N8SBE wrote:

Alan,

For starters where are all the spaces? :-)  Makes it hard to read, 
that's for sure.


That's weird.  The spaces were there in the sent message - they somehow 
disappeared in the reflected copy.;  Let's try again:


CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedforperformingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortotheK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses.

TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadual-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodulardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadigitalvoicerecorder,remotecontrol,andCWdecoder.

TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeaturesadual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoincludesabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremotecontrol.

Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepoweroutput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstillacapabletransceiver,anddependingontheuser’sneeds,itmaybethebetteroption.
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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Dale Boresz]

Unfortunately, there are a lot of missing spaces on the CW bands too.

73,
Dale - WA8SRA

On Fri, Feb 17, 2023 at 2:49 PM Dave New, N8SBE  wrote:

> Alan,
>
> For starters where are all the spaces? :-)  Makes it hard to read,
> that's for sure.
>
> ...
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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Dave (NK7Z)]

The AI has determined that it is the humans duty to get used to the far 
more efficient method of writing, by the removal of spaces...


Saves time, saves space, and best of all saves CPU cycles...  You stupid 
humans need to realize that...  Oh wait...  Never mind, how can I help you?


73,
Dave,
https://www.nk7z.net
On 2/17/23 11:48, Dave New, N8SBE wrote:

Alan,

For starters where are all the spaces? :-)  Makes it hard to read, 
that's for sure.


There are so many errors:
1) The K3 might be considered an HF/VHF receiver, is you count 6M as 
VHF.  Also, you can add an internal 2M transverter, but that's optional.
2) The K3 has 'up to' 100W.  Not sure if that's a reference to the 
continuously-variable output power, or the fact that the base K3 is a 
10W (12W?) rig.

3) The dual-channel receiver for the K3 is an option.
4) One roofing filter is required for the K3.  More (up to 5 per 
receiver) are optional.

5) The ATU is optional for the K3.
6) Remote control for the K3 is not a built-in option.  Are they taking 
about the K3/0?

7) The CW decoder for the K3 comes standard, and is not an option.
8) The K4 (AFAIK) is not a UHF radio (see 1, above).  I don't think a 
UHF internal transverter option has been announced (but it would be nice)?

9) 200W for the K4?  I wish.
10) The K4D has dual 'spectral' (to steal a phrase from Flex) units, but 
that's an option.

11) The K4HD has roofing filters, not the base K4 or K4D.
12) The ATU is also optional for the K4.
13) The optional remote control for the K4 is not built-in, and so far, 
not available.  Could they be talking about the K4/0?


73,
-- Dave, N8SBE

On 2023-02-17 13:16, Alan Bloom wrote:

The latest fad in AI (Artificial Intelligence) is ChatGPT, now
supported on Google and other platforms.  I think of it as a "super
Google" where you can ask questions and get detailed answers.  Just
for grins I entered the following request with the following answer.
The response "sounds" very authoritative, but see if you can spot all
the errors. :=)

Alan N1AL

CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedforperformingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortotheK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses.

TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadual-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodulardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadigitalvoicerecorder,remotecontrol,andCWdecoder.

TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeaturesadual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoincludesabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremotecontrol.

Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepoweroutput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstillacapabletransceiver,anddependingontheuser’sneeds,itmaybethebetteroption.
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Re: [Elecraft] Checking out Elecraft on ChatGPT

[Dave New, N8SBE]

Alan,

For starters where are all the spaces? :-)  Makes it hard to read, 
that's for sure.


There are so many errors:
1) The K3 might be considered an HF/VHF receiver, is you count 6M as 
VHF.  Also, you can add an internal 2M transverter, but that's optional.
2) The K3 has 'up to' 100W.  Not sure if that's a reference to the 
continuously-variable output power, or the fact that the base K3 is a 
10W (12W?) rig.

3) The dual-channel receiver for the K3 is an option.
4) One roofing filter is required for the K3.  More (up to 5 per 
receiver) are optional.

5) The ATU is optional for the K3.
6) Remote control for the K3 is not a built-in option.  Are they taking 
about the K3/0?

7) The CW decoder for the K3 comes standard, and is not an option.
8) The K4 (AFAIK) is not a UHF radio (see 1, above).  I don't think a 
UHF internal transverter option has been announced (but it would be 
nice)?

9) 200W for the K4?  I wish.
10) The K4D has dual 'spectral' (to steal a phrase from Flex) units, but 
that's an option.

11) The K4HD has roofing filters, not the base K4 or K4D.
12) The ATU is also optional for the K4.
13) The optional remote control for the K4 is not built-in, and so far, 
not available.  Could they be talking about the K4/0?


73,
-- Dave, N8SBE

On 2023-02-17 13:16, Alan Bloom wrote:

The latest fad in AI (Artificial Intelligence) is ChatGPT, now
supported on Google and other platforms.  I think of it as a "super
Google" where you can ask questions and get detailed answers.  Just
for grins I entered the following request with the following answer. 
The response "sounds" very authoritative, but see if you can spot all
the errors. :=)

Alan N1AL

CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedforperformingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortotheK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses.

TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadual-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodulardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadigitalvoicerecorder,remotecontrol,andCWdecoder.

TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeaturesadual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoincludesabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremotecontrol.

Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepoweroutput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstillacapabletransceiver,anddependingontheuser’sneeds,itmaybethebetteroption.
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[Elecraft] Checking out Elecraft on ChatGPT

[Alan Bloom]

The latest fad in AI (Artificial Intelligence) is ChatGPT, now supported 
on Google and other platforms.  I think of it as a "super Google" where 
you can ask questions and get detailed answers.  Just for grins I 
entered the following request with the following answer.  The response 
"sounds" very authoritative, but see if you can spot all the errors. :=)


Alan N1AL

CompareanElecraftK3withanElecraftK4.

TheElecraftK3andElecraftK4arebothhigh-endAmateurRadiotransceiversdesignedforperformingradiooperationsinboththeHFandVHF/UHFbands.TheK3isthepredecessortotheK4,butbothmodelsoffertop-of-the-lineperformancefortheirrespectiveclasses.

TheK3isanHF/VHFtransceiverthatoffersupto100wattsofpoweroutput.Itfeaturesadual-channelreceiver,anoptionalroofingfilter,andabuilt-inantennatuner.Itisamodulardesign,allowinguserstocustomizetheirsetupwithadditionalmodules,suchasadigitalvoicerecorder,remotecontrol,andCWdecoder.

TheK4isanHF/VHF/UHFtransceiverthatoffersupto200wattsofpoweroutput.Itfeaturesadual-channelreceiver,roofingfilters,andanintegratedantennatuner.Italsoincludesabuilt-indigitalvoicerecorderandaCWdecoder.Italsosupportsanoptionalremotecontrol.

Intermsofperformance,theK4isthesuperiorofthetwomodels,asitprovidesmorepoweroutput,abroaderrangeoffrequencies,andadditionalfeatures.However,theK3isstillacapabletransceiver,anddependingontheuser’sneeds,itmaybethebetteroption.
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Re: [Elecraft] Checking K3S receive sensitivity

[Alan]

Yes, those are the correct resistor values for a 63 dB attenuator, but 
as a practical matter, you may find that you have trouble getting that 
much attenuation in a single stage due to the stray capacitance of the 
series resistor.  It might be better to break the attenuator up into two 
sections of about half the attenuation.


As far as resistor choice, all resistors have some stray inductance and 
capacitance.  In my experience, "non-inductive" resistors like carbon 
film or metal film tend to have best broad-band performance with values 
in the vicinity of 100-200 ohms (at least for through hole resistors). 
Higher values are limited by stray capacitance; lower values are limited 
by the stray inductance.


So if you need a low resistance, two or more equal-value resistors in 
parallel may work better.  For a high resistance, several in series may 
give better results.


Alan N1AL


On 12/24/2017 09:11 PM, Tom Norris wrote:

I have completed the K3S kit assembly but had questions about the receive
sensitivity. On the advice of Gary, AB7MY at Elecraft Support (Thank you) I
have went through the filter configuration again via the K3 Utility and
improved things to the point that I now hear AM broadcast stations but few
hams down in the mud (band condx? and poor single #14 insulated long wire
antenna 6' in air-my son is to help me get OCFDP up when we can (have 6
element tri-band yagi that needs rebuilt on saw horses :-)). The only
signal generator I have is an antenna analyzer with a -10dbm output. After
some research to use the analyzer to supply a low level signal to the K3S I
have come up with these values for a Pi attenuator circuit and would like
to have someone check my results and give advice:
-10dbm analyzer fixed output or 71 millivolt rms attenuated to 50
microvolts rms would be, I believe, a 63db attenuation. For a Pi attenuator
the resistor values would be two R1=50 ohm resistors (signal to gnd), for
the one R2=35.3 kohm resistor (in series with the signal between the two R2
resistors). Probably just use two 47 ohm and one 33 kohm. I don't intend to
do ANY calibrations with this device, just a way to see how the K3S is
functioning and that my thinking is in the ball park.

Thank you and 73,
Tom NB5Q
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Re: [Elecraft] Checking K3S receive sensitivity

[TKNorris]

Forgot to ask about good sources for less than a gross of each non-inductive
resistors (carbon film?)
Tom NB5Q 



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Re: [Elecraft] Checking K3S receive sensitivity

[TKNorris]

Forgot to ask about good sources for less than a gross of each non-inductive
resistors (carbon film?)
Tom NB5Q 



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[Elecraft] Checking K3S receive sensitivity

[Tom Norris]

I have completed the K3S kit assembly but had questions about the receive
sensitivity. On the advice of Gary, AB7MY at Elecraft Support (Thank you) I
have went through the filter configuration again via the K3 Utility and
improved things to the point that I now hear AM broadcast stations but few
hams down in the mud (band condx? and poor single #14 insulated long wire
antenna 6' in air-my son is to help me get OCFDP up when we can (have 6
element tri-band yagi that needs rebuilt on saw horses :-)). The only
signal generator I have is an antenna analyzer with a -10dbm output. After
some research to use the analyzer to supply a low level signal to the K3S I
have come up with these values for a Pi attenuator circuit and would like
to have someone check my results and give advice:
-10dbm analyzer fixed output or 71 millivolt rms attenuated to 50
microvolts rms would be, I believe, a 63db attenuation. For a Pi attenuator
the resistor values would be two R1=50 ohm resistors (signal to gnd), for
the one R2=35.3 kohm resistor (in series with the signal between the two R2
resistors). Probably just use two 47 ohm and one 33 kohm. I don't intend to
do ANY calibrations with this device, just a way to see how the K3S is
functioning and that my thinking is in the ball park.

Thank you and 73,
Tom NB5Q
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Re: [Elecraft] Checking VFO accuracy using WWV

[David Anderson via Elecraft]

It is human nature to be disappointed if we don't get the nominal figure, but 
only the lower limit  even if still within spec.  We wouldn't complain if we 
got a few Watts more than the 100 Watts, and of course 100 Watts sounds like a 
lot more than 89 Watts just as $100 does to $89. 

73 from David GM4JJJ

> On 19 Dec 2016, at 08:12, Walter Underwood  wrote:
> 
> For the KXPA100, the tolerance is specified. See page 30 of the manual.
> 
> "Power Output: Max.100 watts at 13.8 V, 1.8 to 29.7 MHz and 80 watts 50-54 
> MHz PEP CW/SSB/DATA, ± 1 dB“
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
>> On Dec 18, 2016, at 9:22 PM, Jim Brown  wrote:
>> 
>> On Sun,12/18/2016 2:04 PM, Wes Stewart wrote:
>>> If the manufacturer specifies that the transmitter puts out 100W, and 
>>> indeed uses that as a part of the part number on the order sheet, then it's 
>>> not unreasonable for the customer to expect 100 W out. 
>> 
>> The published spec is 100W typical, with no tolerance specified.
>> 
>> 73, Jim K9YC
>> 
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Re: [Elecraft] Checking VFO accuracy using WWV

[Walter Underwood]

For the KXPA100, the tolerance is specified. See page 30 of the manual.

"Power Output: Max.100 watts at 13.8 V, 1.8 to 29.7 MHz and 80 watts 50-54 MHz 
PEP CW/SSB/DATA, ± 1 dB“

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

> On Dec 18, 2016, at 9:22 PM, Jim Brown  wrote:
> 
> On Sun,12/18/2016 2:04 PM, Wes Stewart wrote:
>> If the manufacturer specifies that the transmitter puts out 100W, and indeed 
>> uses that as a part of the part number on the order sheet, then it's not 
>> unreasonable for the customer to expect 100 W out. 
> 
> The published spec is 100W typical, with no tolerance specified.
> 
> 73, Jim K9YC
> 
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Re: [Elecraft] Checking VFO accuracy using WWV

[Wes Stewart]

By your "logic" a few weeks ago when my 100 W K3S started putting out zero watts 
it was still in spec, since there isn't any,  Right?


And if you want to open another can of worms let's talk about "typical" TX IMD.

On 12/18/2016 10:22 PM, Jim Brown wrote:

On Sun,12/18/2016 2:04 PM, Wes Stewart wrote:
If the manufacturer specifies that the transmitter puts out 100W, and indeed 
uses that as a part of the part number on the order sheet, then it's not 
unreasonable for the customer to expect 100 W out. 


The published spec is 100W typical, with no tolerance specified.

73, Jim K9YC 


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Re: [Elecraft] Checking VFO accuracy using WWV

[Jim Brown]

On Sun,12/18/2016 2:04 PM, Wes Stewart wrote:
If the manufacturer specifies that the transmitter puts out 100W, and 
indeed uses that as a part of the part number on the order sheet, then 
it's not unreasonable for the customer to expect 100 W out. 


The published spec is 100W typical, with no tolerance specified.

73, Jim K9YC

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Re: [Elecraft] Checking VFO accuracy using WWV

[Ron D'Eau Claire]

It all depends upon the accuracy of the test equipment, power supply, etc.
Many commercial RF power meter/dummy load combos are no more than 20%
accurate. 

Elecraft Tech support will help anyone who thinks the power output is low
with those questions.

A better analogy is a Lamborghini spec'd at 610 HP, but the dyno at the
local garage says it is putting out only 490 Hp. (I realize that is not
close to 20% low, but the impact of HP on a car's performance is much more
sensitive to horsepower than the RF output of a transmitter is on its
performance on the air.) 

What Emory said about the impact on operations of a 20% drop in RF power out
is right.  

73, Ron AC7AC

 



-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes
Stewart
Sent: Sunday, December 18, 2016 2:04 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Checking VFO accuracy using WWV

I totally disagree.  If the manufacturer specifies that the transmitter puts
out 100W, and indeed uses that as a part of the part number on the order
sheet, then it's not unreasonable for the customer to expect 100 W out.

That's like buying a Lamborghini Huracan LP 610-4 and discovering that it's
not
610 HP and four-wheel drive but two-wheel drive and 300 HP and being told,
why complain, it's still faster than a Prius.

On 12/18/2016 11:09 AM, Emory Schley wrote:
> Hi Guys;..
>   
> One fellow seemed unhappy with a rig putting out "only" 80 watts instead
of the full 100, but there is no way the ham on the other end of the QSO is
going to detect the "deficit". It pretty much boils down to "Can he hear me"
and "Can I hear him"? If the answer is yes to both questions, then all the
rest is just fodder for textbooks and endless discussion/arguing.

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Re: [Elecraft] Checking VFO accuracy using WWV

[Wes Stewart]

I totally disagree.  If the manufacturer specifies that the transmitter puts out 
100W, and indeed uses that as a part of the part number on the order sheet, then 
it's not unreasonable for the customer to expect 100 W out.


That's like buying a Lamborghini Huracan LP 610-4 and discovering that it's not 
610 HP and four-wheel drive but two-wheel drive and 300 HP and being told, why 
complain, it's still faster than a Prius.


On 12/18/2016 11:09 AM, Emory Schley wrote:

Hi Guys;..
  
One fellow seemed unhappy with a rig putting out "only" 80 watts instead of the full 100, but there is no way the ham on the other end of the QSO is going to detect the "deficit". It pretty much boils down to "Can he hear me" and "Can I hear him"? If the answer is yes to both questions, then all the rest is just fodder for textbooks and endless discussion/arguing.


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Re: [Elecraft] Checking VFO accuracy using WWV

[Fred Jensen]

One part of Amateur Radio is transmitting and receiving.  Another part 
of Amateur Radio is design and construction of equipment.  Yet another 
is delving into the concepts of doing things with available 
equipment/methods.  Traffic handling was once a big activity ... think 
"American Radio RELAY League" ... it's now an anachronism but a few of 
us still dabble in it.  Amateur Radio is a big tent [to plagarize from 
the world of politics], there's room for everyone.


73,

Fred K6DGW
- Sparks NV DM09dn

- Northern California Contest Club
- CU in the Cal QSO Party 7-8 Oct 2017
- www.cqp.org

On 12/18/2016 10:09 AM, Emory Schley wrote:


Hi Guys;

I really don't mean to show my ignorance, but all this talk about
calibration and power out is good up to a point, but if your signal
is off the mark by a couple Hertz, does it really make any REAL WORLD
difference? Even when running PSK31 surely you can be off the "beam"
a Hertz or two or three, maybe more– and you'll still have rock solld
communications.

One fellow seemed unhappy with a rig putting out "only" 80 watts
instead of the full 100, but there is no way the ham on the other end
of the QSO is going to detect the "deficit". It pretty much boils
down to "Can he hear me" and "Can I hear him"? If the answer is yes
to both questions, then all the rest is just fodder for textbooks and
endless discussion/arguing.

I know engineers and wannabe engineers want absolute accuracy. I'm no
fan of sloppiness myself, BUT if you actually consider what you're
dealing with along with the vagaries of propagation, then "close
enough" should be good enough for anyone. If the tool (the
radio/antenna system, in this case) is good enough to get the job
done, then isn't that "good enough," period?

I really don't wish to start any in-fighting here, and I freely admit
I'm not technologically competent enough to sustain my opinions in
any absolute way in a technical discussion, but really, instead of
wasting so much time slicing hairs, wouldn't you really rather be on
the air instead, having fun? I would. :-)

Merry Christmas/Happy Hannukah/Have a Good Day (Take your pick),

Emory Schley N4LP

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Re: [Elecraft] Checking VFO accuracy using WWV

[Emory Schley]

Hi Guys;
 
I really don't mean to show my ignorance, but all this talk about calibration 
and power out is good up to a point, but if your signal is off the mark by a 
couple Hertz, does it really make any REAL WORLD difference? Even when running 
PSK31 surely you can be off the "beam" a Hertz or two or three, maybe more– and 
you'll still have rock solld communications.
 
One fellow seemed unhappy with a rig putting out "only" 80 watts instead of the 
full 100, but there is no way the ham on the other end of the QSO is going to 
detect the "deficit". It pretty much boils down to "Can he hear me" and "Can I 
hear him"? If the answer is yes to both questions, then all the rest is just 
fodder for textbooks and endless discussion/arguing.
 
I know engineers and wannabe engineers want absolute accuracy. I'm no fan of 
sloppiness myself, BUT if you actually consider what you're dealing with along 
with the vagaries of propagation, then "close enough" should be good enough for 
anyone. If the tool (the radio/antenna system, in this case) is good enough to 
get the job done, then isn't that "good enough," period?
 
I really don't wish to start any in-fighting here, and I freely admit I'm not 
technologically competent enough to sustain my opinions in any absolute way in 
a technical discussion, but really, instead of wasting so much time slicing 
hairs, wouldn't you really rather be on the air instead, having fun? I would. 
:-)
 
Merry Christmas/Happy Hannukah/Have a Good Day (Take your pick),
 
Emory Schley
N4LP
 
 

Sent: Sunday, December 18, 2016 at 12:18 PM
From: "Brian Denley" <b.den...@comcast.net>
To: brian <als...@comcast.net>
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Checking VFO accuracy using WWV
Thanks to all for the explanations.

Brian Denley
KB1VBF
Sent from my iPad

> On Dec 18, 2016, at 8:46 AM, brian <als...@comcast.net> wrote:
>
> Expectations may be too high.
>
> All these WWV methods assume there is no Doppler shift present on the WWV 
> signal. Other things to consider: TCXO drift, synthesizer limitations and new 
> synthesizer quirks.
>
> During disturbed times, Doppler could be 1 Hz or more.
> Unfortunately, the Doppler shift present depends upon just about everything-- 
> location, time of day, atmospheric reflecting layer heights, path, the list 
> goes on.
>
> Keep in mind the new synthesizers add an additional quarter Hz (+/-) 
> uncertainty. The syncing of the SI570 to the master oscillator produces 
> sawtooth jumps of that magnitude, sometimes more vs time.
> There are also band to band variations introduced by limitation in finding 
> exact synthesizer divide ratios. Old synthesizers showed many Hz deviations 
> from band to band and as one tuned up the band. These variations are much 
> smaller with the new synthesizers.
>
> Then there is drift. If you are not using XREF, you will experience maybe 10 
> Hz or more warm up drifts. The high stability oscillator takes about four 
> hours to reach its most stable point. The standard oscillator reaches that 
> point a few hours earlier.
>
> The old engineer cautioned: "Never believe the last digit displayed in any 
> device". In this case, don't expect to be within 1 Hz on all bands, all 
> frequencies at all times-- no matter what calibration method you use. Look at 
> the K3 specs. Nowhere will you find an expectation of such accuracy.
>
> 73 de Brian/K3KO
>
>> On 12/18/2016 12:40 PM, K9ZTV wrote:
>> The R.L. Drake Company referred to the zeroing or beating indicators as 
>> "canary chirps," the goal being to slow the "chirping" until there was a 
>> steady tone indicating you were then dead-on. I still find that the most 
>> descriptive way to tell someone how to identify the pulsing when doing the 
>> Reference Calibration against WWV in a K3 (at the highest frequency you can 
>> copy them). The trick is to get the right balance in volume between WWV's 
>> main carrier tone and the K3's sidetone so you can hear the "chirps."
>>
>> Kent, K9ZTV
>>
>>
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Re: [Elecraft] Checking VFO accuracy using WWV

[Nr4c]

Chirps?  Mine is more like a slow "whump whump whump", not a chirp. 

Sent from my iPhone
...nr4c. bill


> On Dec 18, 2016, at 7:40 AM, K9ZTV  wrote:
> 
> The R.L. Drake Company referred to the zeroing or beating indicators as 
> "canary chirps,"  the goal being to slow the "chirping" until there was a 
> steady tone indicating you were then dead-on.  I still find that the most 
> descriptive way to tell someone how to identify the pulsing when doing the 
> Reference Calibration against WWV in a K3 (at the highest frequency you can 
> copy them). The trick is to get the right balance in volume between WWV's 
> main carrier tone and the K3's sidetone so you can hear the "chirps." 
> 
> Kent, K9ZTV
> 
> 
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Re: [Elecraft] Checking VFO accuracy using WWV

[Brian Denley]

Thanks to all for the explanations.

Brian Denley
KB1VBF
Sent from my iPad

> On Dec 18, 2016, at 8:46 AM, brian  wrote:
> 
> Expectations may be too high.
> 
> All these WWV methods assume there is no Doppler shift present on the WWV 
> signal.  Other things to consider: TCXO drift, synthesizer limitations and 
> new synthesizer quirks.
> 
> During disturbed times, Doppler could be 1 Hz or more.
> Unfortunately, the Doppler shift present depends upon just about everything-- 
> location, time of day, atmospheric reflecting layer heights, path, the list 
> goes on.
> 
> Keep in mind the new synthesizers add an additional quarter Hz (+/-) 
> uncertainty.  The syncing of the SI570 to the master oscillator produces 
> sawtooth jumps of that magnitude, sometimes more vs time.
> There are also band to band variations introduced by limitation in finding 
> exact synthesizer divide ratios.  Old synthesizers showed many Hz deviations 
> from band to band and as one tuned up the band.  These variations are much 
> smaller with the new synthesizers.
> 
> Then there is drift.  If you are not using XREF, you will experience maybe 10 
> Hz or more warm up drifts.  The high stability oscillator takes about four 
> hours to reach its most stable point.  The standard oscillator reaches that 
> point a few hours earlier.
> 
> The old engineer cautioned: "Never believe the last digit displayed in any 
> device".  In this case, don't expect to be within 1 Hz on all bands, all 
> frequencies at all times-- no matter what calibration method you use.   Look 
> at the K3 specs.  Nowhere will you find an expectation of such accuracy.
> 
> 73 de Brian/K3KO
> 
>> On 12/18/2016 12:40 PM, K9ZTV wrote:
>> The R.L. Drake Company referred to the zeroing or beating indicators as 
>> "canary chirps,"  the goal being to slow the "chirping" until there was a 
>> steady tone indicating you were then dead-on.  I still find that the most 
>> descriptive way to tell someone how to identify the pulsing when doing the 
>> Reference Calibration against WWV in a K3 (at the highest frequency you can 
>> copy them). The trick is to get the right balance in volume between WWV's 
>> main carrier tone and the K3's sidetone so you can hear the "chirps."
>> 
>> Kent, K9ZTV
>> 
>> 
>> __
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Re: [Elecraft] Checking VFO accuracy using WWV

[brian]

Expectations may be too high.

All these WWV methods assume there is no Doppler shift present on the 
WWV signal.  Other things to consider: TCXO drift, synthesizer 
limitations and new synthesizer quirks.


During disturbed times, Doppler could be 1 Hz or more.
Unfortunately, the Doppler shift present depends upon just about 
everything-- location, time of day, atmospheric reflecting layer 
heights, path, the list goes on.


Keep in mind the new synthesizers add an additional quarter Hz (+/-) 
uncertainty.  The syncing of the SI570 to the master oscillator produces 
sawtooth jumps of that magnitude, sometimes more vs time.
There are also band to band variations introduced by limitation in 
finding exact synthesizer divide ratios.  Old synthesizers showed many 
Hz deviations from band to band and as one tuned up the band.  These 
variations are much smaller with the new synthesizers.


Then there is drift.  If you are not using XREF, you will experience 
maybe 10 Hz or more warm up drifts.  The high stability oscillator takes 
about four hours to reach its most stable point.  The standard 
oscillator reaches that point a few hours earlier.


The old engineer cautioned: "Never believe the last digit displayed in 
any device".  In this case, don't expect to be within 1 Hz on all bands, 
all frequencies at all times-- no matter what calibration method you 
use.   Look at the K3 specs.  Nowhere will you find an expectation of 
such accuracy.


73 de Brian/K3KO

On 12/18/2016 12:40 PM, K9ZTV wrote:

The R.L. Drake Company referred to the zeroing or beating indicators as "canary chirps,"  the goal 
being to slow the "chirping" until there was a steady tone indicating you were then dead-on.  I 
still find that the most descriptive way to tell someone how to identify the pulsing when doing the Reference 
Calibration against WWV in a K3 (at the highest frequency you can copy them). The trick is to get the right 
balance in volume between WWV's main carrier tone and the K3's sidetone so you can hear the 
"chirps."

Kent, K9ZTV


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Re: [Elecraft] Checking VFO accuracy using WWV

[K9ZTV]

The R.L. Drake Company referred to the zeroing or beating indicators as "canary 
chirps,"  the goal being to slow the "chirping" until there was a steady tone 
indicating you were then dead-on.  I still find that the most descriptive way 
to tell someone how to identify the pulsing when doing the Reference 
Calibration against WWV in a K3 (at the highest frequency you can copy them). 
The trick is to get the right balance in volume between WWV's main carrier tone 
and the K3's sidetone so you can hear the "chirps." 

Kent, K9ZTV


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[Elecraft] Checking U1 for communication with the K3

[Art Nienhouse]

I want to check my K3 for communication with my computer.

Does anybody know what value and which pin to check on U1 on the I O 
board lightning strike near by hit my wireless router modem and killed 
my desk top computer which was connected to my K3 rs232 port?
I do not have at this time any computer or usb/serial adapter to test 
the radio with.


Regards
Art
ka9zap
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Re: [Elecraft] Checking U1 for communication with the K3

[Cady, Fred]

Hi Art,
Try this:

The error message ERR IO3 often means that the RS232 serial interface
chip on the KIO3 board has failed. This may be caused by a static
discharge or nearby lightning strike. The chip that fails is U1 on the
KIO board, as shown in  Figure 7 25. Here is a procedure to check U1.
1.  Remove any SERIAL and ACC cables.
2.  Remove the K3's top cover.
3.  Check to see if at least -5 VDC is present on pin 8 (or the gold
through-hole just below pin 8) of U1 (-7 VDC or more is normal).
4.  Check to see if U1 is hot or visibly heat damaged.
5.  If any of these checks indicates that the magic smoke has been
let out, you will need to contact Elecraft service to determine a course
of action to fix the KIO3 board.


Fred Cady
The Elecraft K3: Design, Configuration and Operation Second Edition
www.ke7x.com


 -Original Message-
 From: elecraft-boun...@mailman.qth.net [mailto:elecraft-
 boun...@mailman.qth.net] On Behalf Of Art Nienhouse
 Sent: Monday, December 10, 2012 9:59 AM
 To: Elecraft@mailman.qth.net
 Subject: [Elecraft] Checking U1 for communication with the K3
 
 I want to check my K3 for communication with my computer.
 
 Does anybody know what value and which pin to check on U1 on the I O
 board lightning strike near by hit my wireless router modem and killed
 my desk top computer which was connected to my K3 rs232 port?
 I do not have at this time any computer or usb/serial adapter to test
 the radio with.
 
 Regards
 Art
 ka9zap
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Re: [Elecraft] Checking U1 for communication with the K3

[Art Nienhouse]

/*Thanks to all who responded
Regards
Art
ka9zap

*/
On 12/10/2012 12:56 PM, Cady, Fred wrote:

Hi Art,
Try this:

The error message ERR IO3 often means that the RS232 serial interface
chip on the KIO3 board has failed. This may be caused by a static
discharge or nearby lightning strike. The chip that fails is U1 on the
KIO board, as shown in  Figure 7 25. Here is a procedure to check U1.
1.  Remove any SERIAL and ACC cables.
2.  Remove the K3's top cover.
3.  Check to see if at least -5 VDC is present on pin 8 (or the gold
through-hole just below pin 8) of U1 (-7 VDC or more is normal).
4.  Check to see if U1 is hot or visibly heat damaged.
5.  If any of these checks indicates that the magic smoke has been
let out, you will need to contact Elecraft service to determine a course
of action to fix the KIO3 board.


Fred Cady
The Elecraft K3: Design, Configuration and Operation Second Edition
www.ke7x.com



-Original Message-
From: elecraft-boun...@mailman.qth.net [mailto:elecraft-
boun...@mailman.qth.net] On Behalf Of Art Nienhouse
Sent: Monday, December 10, 2012 9:59 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] Checking U1 for communication with the K3

I want to check my K3 for communication with my computer.

Does anybody know what value and which pin to check on U1 on the I O
board lightning strike near by hit my wireless router modem and killed
my desk top computer which was connected to my K3 rs232 port?
I do not have at this time any computer or usb/serial adapter to test
the radio with.

Regards
Art
ka9zap
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Re: [Elecraft] checking IF output problem from K3XVA? none detected...

[Don Wilhelm]

  Brian,

Possibilities that I can think of are:
Bad cable inside the K3 (check with an ohmmeter)
Cable swapped ground and signal (examine physically or use ohmmeter)
IF output transistor bad.

The cures for any problems found can be had at k3supp...@elecraft.com.

Check the cable you are using outside the K3 as well.

73,
Don W3FPR

On 9/27/2010 9:50 PM, Brian Pepperdine wrote:



 Hi.
 I installed a K3XVA board into the K3 in order to get IF output for an LP PAN 
 and PSDR.

 I was not seeing signals on PSDR, nor any input levels on the sound card 
 inputs,  so began to question if I actually HAD output from the K3XV.

 It was recommended to me that I feed the IF output into a receiver and see if 
 I heard output at 8.215.
 I do not hear anything.

 I did go back to check my work and the board is inserted into the jack and 
 the thin coax cable is going from the board  to the underside plug.

 Any ideas on troubleshooting the seeming lack of output? I did install the 
 resistor retrofit ( 13K, 1/8 watt leaded).

 Thought I would ask here before I message anything to Elecraft service.

 As always, but thanfully infrequently, thanks

 Brien
 VE3VAW
 Toronto, ON


   
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[Elecraft] checking IF output problem from K3XVA? none detected...

[Brian Pepperdine]

Hi.
I installed a K3XVA board into the K3 in order to get IF output for an LP PAN 
and PSDR.

I was not seeing signals on PSDR, nor any input levels on the sound card 
inputs,  so began to question if I actually HAD output from the K3XV.

It was recommended to me that I feed the IF output into a receiver and see if I 
heard output at 8.215.
I do not hear anything.

I did go back to check my work and the board is inserted into the jack and the 
thin coax cable is going from the board  to the underside plug.

Any ideas on troubleshooting the seeming lack of output? I did install the 
resistor retrofit ( 13K, 1/8 watt leaded).

Thought I would ask here before I message anything to Elecraft service.

As always, but thanfully infrequently, thanks

Brien
VE3VAW
Toronto, ON


  
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Re: [Elecraft] Checking KPA relays

[n0jrn]

 OK,Back in the shack and checking the LPF of my KPA100.Per 
Don's direction,   I disconnected the amps RF line from the main board of 
the K2 and installed a 50 ohm resistor in the plug end of the RF line.

( resistor measure 50.5 ohms per my DMM )

Hooked my MFJ 259B  to the PL259 on the KPA100 and checked results of the 
low pass filter set up on each band.

Results as follows:

160 Mtr   1.8 1.2-1  45 ohms
2.0 1.2-1  49 ohms

80 Mtr 3.5 1.3-1  53 ohms
4.0 1.3-1  49 ohms

40 Mtr 7.0 1.2-1  41 ohms
7.4 1.2-1  41 ohms

30 Mtr 10.11.4-1 50 ohms
   10.150 1.4-1 50 ohms

20 Mtr14.0 1.2-1 40 ohms
   14.4 1.1-1 40 ohms

17 Mtr18.065  1.2-137 ohms
   18.2  1.2-137 ohms

15 Mtr 21.100 1.3-135 ohms
21.4 1.3-134 ohms

12 Mtr 24.890 1.2-135 ohms
24.990 1.2-135 ohms

10 Mtr 28.0  1.3-133 ohms
28.3  1.3-133 ohms
28.9  1.3-133 ohms

Becomes obvious that K3 - K12 are switching and the filters are intact.

Just a quick recap on the problem I have with my KPA100,   while trying to 
do the Transmit tests on page 50 of the KPA manual,  something is causing 
the KPA100 and / or the K2 to drop out of TX around the 35 watt level on all 
bands.

I've read as much as can be found in the archives on this and similar 
issues.  I know I've got to go back and reset the bias of the amp to insure 
it is correct.

I'll retest the output from there and see if I've gained anything.

FWIW, I am using a quality watt meter in line with my dummy load.  The 
watt meter agrees with the K2's displayed results relative to the amount of 
output and reflected power.

I have reset C1 a couple of times and I've been working with R26 to see if I 
can gain any improvement with it's adjustment.   ( I can get to around 50 
watts on the lower bands by working with R26 but my requested power and 
actual output are off quite a bit when I do that )

SO,for tonight's activity !

I'll recheck the bias settings,   check voltages at D11 through D14 and 
recheck T4.

Any other suggestions would be great.

I'll let you know what I come up with.

73 Jerry N0JRN




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[Elecraft] Checking KPA relays

[n0jrn]

Gang:   I'm finally off for the weekend.   Just curious, what is the 
easiest way to check the low pass filter relays to see if they are 
working?

I've already checked U2 and pins 13 -18 are going low as they should.  I'm 
just not sure what I should be looking for to determine if the relays are 
working.

Thanks and 73

Jerry  N0JRN 

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Re: [Elecraft] Checking KPA relays

[Don Wilhelm]

Jerry,

I assume you are working on a KPA100 - if not, please ignore.
The easiest way to check the relays and the LPF of the KPA100 is with an 
antenna analyzer.
Put the KPA100 to the right of the K2 (upside down on a book or other 
support) with the ribbon cable connected to the K2.  Power only the base 
K2 through the coaxial jack.
Put the leads of a 50 (ok, 51 will do fine) ohm resistor into the 
connector that normally connects to the AUX RF header.
Power the K2 on and select each band in turn.  For each band, scan 
through the frequency range of the antenna analyzer to determine the 
cutoff frequency for the LPF - it should be higher than the band edge, 
but lower than the 2nd harmonic.
If all bands meet that criteria, the relays and LPF are correct - 
assemble the KPA100 to the base K2 and go.

73,
Don W3FPR

n0jrn wrote:
 Gang:   I'm finally off for the weekend.   Just curious, what is the 
 easiest way to check the low pass filter relays to see if they are 
 working?

 I've already checked U2 and pins 13 -18 are going low as they should.  I'm 
 just not sure what I should be looking for to determine if the relays are 
 working.

 Thanks and 73

 Jerry  N0JRN 

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Re: [Elecraft] Checking KPA relays

[n0jrn]

Thanks Don:

Easy enough !   I appreciate that very much.

Yes I am working with my KPA100.  I'm looking for why the K2 drops out of TX 
when I try to adjust output above 35 watts.

A couple of the bands are also showing excessive current draw and high 
reflected.

Just wanted to check the relays and make sure everything in the LPF first.

I've spent a good part of the evening reading the archives for similar 
issues.   Your comments in most cases take folks back to the SWR bridge and 
related components.

BUT first things first !

Have a great evening

Jerry

 I assume you are working on a KPA100 - if not, please ignore.
 The easiest way to check the relays and the LPF of the KPA100 is with an
 antenna analyzer.
 Put the KPA100 to the right of the K2 (upside down on a book or other
 support) with the ribbon cable connected to the K2.  Power only the base
 K2 through the coaxial jack.
 Put the leads of a 50 (ok, 51 will do fine) ohm resistor into the
 connector that normally connects to the AUX RF header.
 Power the K2 on and select each band in turn.  For each band, scan
 through the frequency range of the antenna analyzer to determine the
 cutoff frequency for the LPF - it should be higher than the band edge,
 but lower than the 2nd harmonic.
 If all bands meet that criteria, the relays and LPF are correct -
 assemble the KPA100 to the base K2 and go.

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Re: [Elecraft] Checking KPA relays

[Don Wilhelm]

Jerry,

Yes, do check the LPF and relays first just as a 'confidence builder'.
If that is all working fine, then I would first direct you to the 
wattmeter section.  Check with an external wattmeter in-line.  If the 
output power is in excess of 100 watts no matter what the requested 
power setting, then the KPA100 wattmeter is not working (D16 and D17 
usually is the problem).  Once you obtain proper power level control, 
then other problems can be addressed if necessary.

73,
Don W3FPR

n0jrn wrote:
 Thanks Don:

 Easy enough !   I appreciate that very much.

 Yes I am working with my KPA100.  I'm looking for why the K2 drops out of TX 
 when I try to adjust output above 35 watts.

 A couple of the bands are also showing excessive current draw and high 
 reflected.

 Just wanted to check the relays and make sure everything in the LPF first.

 I've spent a good part of the evening reading the archives for similar 
 issues.   Your comments in most cases take folks back to the SWR bridge and 
 related components.

 BUT first things first !

 Have a great evening

 Jerry

   
 I assume you are working on a KPA100 - if not, please ignore.
 The easiest way to check the relays and the LPF of the KPA100 is with an
 antenna analyzer.
 Put the KPA100 to the right of the K2 (upside down on a book or other
 support) with the ribbon cable connected to the K2.  Power only the base
 K2 through the coaxial jack.
 Put the leads of a 50 (ok, 51 will do fine) ohm resistor into the
 connector that normally connects to the AUX RF header.
 Power the K2 on and select each band in turn.  For each band, scan
 through the frequency range of the antenna analyzer to determine the
 cutoff frequency for the LPF - it should be higher than the band edge,
 but lower than the 2nd harmonic.
 If all bands meet that criteria, the relays and LPF are correct -
 assemble the KPA100 to the base K2 and go.
 

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 Please help support this email list: http://www.qsl.net/donate.html
 


 No virus found in this incoming message.
 Checked by AVG - www.avg.com 
 Version: 9.0.717 / Virus Database: 270.14.114/2575 - Release Date: 12/19/09 
 03:33:00

   
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[Elecraft] checking

[Bruce Bonnie Rattray]

checking

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[Elecraft] Checking crystal filters, [K3]

[Mike Scott]

I received a bad 6 KHz filter and it was replaced immediately upon my
discovery. In my case the upper and lower sidebands had significantly
different pass band characteristics so it was easy to tell by ear and then
measured with Spectrogram software on my PC.

I have a 500 Hz filter and would not know how to test it for IMD. I don't
have the test equipment to support the test. Does someone know of something
simple that can be done to check roofing filters?

Mike Scott - AE6WA
Tarzana, CA (DM04 / near LA)
K3-100 #508/ KX1  #1311


--
Date: Wed, 18 Jun 2008 15:16:19 -0400
From: Jerry Flanders [EMAIL PROTECTED]
Subject: Re: [Elecraft] RSGB RadCom K3 review posted on RSGB Members
web page
To: Eric Swartz - WA6HHQ, Elecraft [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=us-ascii; format=flowed

At 02:44 PM 6/18/2008, Eric Swartz - WA6HHQ, Elecraft wrote:
Looks like he clearly had a bad 500 Hz filter. It does not match our 
measurements here or Sherwood's.  We'll make sure the customer gets 
a replacement.

Just curious - do you guys check filters before shipping them? Most 
of us out here wouldn't have a clue if we had a bad filter - we would 
just suffer with poor performance without ever knowing why.

Jerry W4UK

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Re: [K3] [Elecraft] Checking crystal filters,

[AD6XY - Mike]

Traditionally this is a particularly hard measurement to make unless the
filter performance is very poor. 

Without professional test gear you will need to obtain or build two very
high quality signal sources, (say identical 7MHz crystal oscillators) at
least one of which needs to be tunable. These have to be buffered and then
very carefully combined. I think there was a design in the ARRL solid state
design book back in the 1980s. Then you can look for the 3rd order IMD
products at audio with something like Spectraview - hoping that your sound
card IMD performance is better than the radio, which it probably is not if
the radio is working. 

You need test sources with very low phase noise, more than 100dB down at the
spacing you are testing at. A typical signal generator is probably not good
enough for this measurement. Well designed crystal oscillators should be OK.

Maybe it is easier just to use the radio. When listening, if you can not
detect any intermods, then you don't have a problem with them.

Mike
-- 
View this message in context: 
http://www.nabble.com/Checking-crystal-filters%2C-tp18010302p1803.html
Sent from the [K3] mailing list archive at Nabble.com.

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RE: [K3] [Elecraft] Checking crystal filters,

[Brett Howard]

Doesn't the radio have a 2-tone generator built into it?

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of AD6XY - Mike
Sent: Thursday, June 19, 2008 8:12 AM
To: elecraft@mailman.qth.net
Subject: Re: [K3] [Elecraft] Checking crystal filters,


Traditionally this is a particularly hard measurement to make unless the
filter performance is very poor. 

Without professional test gear you will need to obtain or build two very
high quality signal sources, (say identical 7MHz crystal oscillators) at
least one of which needs to be tunable. These have to be buffered and then
very carefully combined. I think there was a design in the ARRL solid state
design book back in the 1980s. Then you can look for the 3rd order IMD
products at audio with something like Spectraview - hoping that your sound
card IMD performance is better than the radio, which it probably is not if
the radio is working. 

You need test sources with very low phase noise, more than 100dB down at the
spacing you are testing at. A typical signal generator is probably not good
enough for this measurement. Well designed crystal oscillators should be OK.

Maybe it is easier just to use the radio. When listening, if you can not
detect any intermods, then you don't have a problem with them.

Mike
-- 
View this message in context:
http://www.nabble.com/Checking-crystal-filters%2C-tp18010302p1803.html
Sent from the [K3] mailing list archive at Nabble.com.

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[Elecraft] Checking K2 sensitivity...

[Steve Kallal]

I am the second owner of K2 #2289. I've built and added a number of options.
But I wonder about its rx sensitivity. I often have to use the preamp on 30
and 20 meters to hear weaker signals. The same is not true of my 756 PRO 2,
at least on the same signals while doing an A/B comparison.

That said, I'd like to know the best way to re-check the rx sensitivity on
my K2. I still prefer it to my PRO 2 for copying CW, especially with narrow
filters kicked in. The PRO 2 has horrible ringing with narrow filters.
Otherwise, it just seems like the PRO 2 has better ears. Some how I don't
think that should be. Maybe my K2 needs tweaking.

73,

Steve N6VL

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RE: [Elecraft] Checking K2 sensitivity...

[Darwin, Keith]

-Original Message-
I am the second owner of K2 #2289 ... I wonder about its rx sensitivity
... it just seems like the PRO 2 has better ears.
--

One has to be careful about confusing audio output with sensitivity.
The K2 tends to produce less audio output with weak signals than other
rigs and that leads us to conclude it doesn't hear.  What it doesn't do
is reproduce all signal levels at the same audio level.

An S9 signal is just as loud as the band noise in most rigs because
their AGCs are very aggressive  flat.  They turn the gain down for all
signals to match them to the quietest signal, effectively making audio
output constant.

The K2 has some slope to its AGC.  Loud signals produce more audio
output than quiet signals.  Band noise is quieter than signals.  So as
you listen to the K2, you don't hear much unless there is a signal
there.  The K2 is still picking up everything the Pro 2 is, it just
isn't amplifying it as much.

An interesting test would be to turn AGC off on both rigs, set both with
RF gain max and AF gain so they are the same volume, then tune in very
weak signals.  I bet they both pick them up equally well.

- Keith N1AS -
- K2 5411.ssb.100 -
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Re: [Elecraft] Checking K2 sensitivity...

[Dave G4AON]

There was a problem with transmit power and RX sensitivity on early 
K2s,  my K2 serial #1892 had this problem. Basically the tuning cap(s) 
in the band pass filter needed a fixed capacitor of around 10 pF across 
the variable as it was right at the end of it's tuning range, you might 
want to check back through the list for details.


My K2 gives 0.12 uV sensitivity for 10 dB signal to noise without the 
pre-amp, and 0.1 uV with the pre-amp on.


73 Dave G4AON
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Re: [Elecraft] Checking K2 sensitivity...

[Dave G4AON]

The 20m low power/sensitivity bulletin on early K2s is on the Elecraft 
web site is at:


http://www.elecraft.com/Apps/k2_20M_LowPower.htm

73 Dave, G4AON
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RE: [Elecraft] Checking K2 sensitivity...

[Ron D'Eau Claire]

Something that Elecraft offers (that you won't find from other major
manufacturers as far as I know) is a way for you to measure the sensitivity
of your receiver using standard measurement techniques easily and
inexpensively even if you don't have much test equipment. 

You know that sensitivity and volume are two different things. Volume is
easy to achieve. The ability to hear signals down in the band noise is
something else. Once you have enough volume to hear the noise, raising it
won't help dig out that signal. For that you need a better signal-to-noise
ratio.

Elecraft has neat, inexpensive little mini-kit calibrated signal
generators that come with instructions on how to measure the sensitivity of
your receiver. They are quick and fun to build with a few simple tools. You
can use one to make accurate measurements of the MDS (minimum discernable
signal) and the Signal-to-Noise-Plus-Noise ratio of your K2 (and any other
receiver) for meaningful side-by-side comparisons as well as a way to check
to see if your rig is still hearing as well as it has in the past. 

Check out the XG1 (40 meter only) or XG2 (80/40/20 meter) signal generators
at
http://www.elecraft.com/elecraft_prod_list.htm

Ron (A shameless endorsement) AC7AC



-Original Message-
I am the second owner of K2 #2289. I've built and added a number of options.
But I wonder about its rx sensitivity. I often have to use the preamp on 30
and 20 meters to hear weaker signals. The same is not true of my 756 PRO 2,
at least on the same signals while doing an A/B comparison.

That said, I'd like to know the best way to re-check the rx sensitivity on
my K2. I still prefer it to my PRO 2 for copying CW, especially with narrow
filters kicked in. The PRO 2 has horrible ringing with narrow filters.
Otherwise, it just seems like the PRO 2 has better ears. Some how I don't
think that should be. Maybe my K2 needs tweaking.

73,

Steve N6VL

_

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[Elecraft] checking

[Arie Kleingeld PA3A]

Just checking if my e-mail comes through.

73 Arie PA3A

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Re: [Elecraft] Checking out noise blanker

[Thom R LaCosta]

On Fri, 17 Feb 2006, Harvey Howell wrote:


take off the sweater


Lo these many years ago, if I had a noise blanker and could enlist the aid of 
some buxom young thing to help with QRN reduction!


Thom

www.baltimorehon.com/Home of the Baltimore Lexicon
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RE: [Elecraft] Checking out noise blanker

[EricJ]

Some guys just know how to party...

Eric
KE6US
www.ke6us.com 

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Thom R LaCosta
Sent: Sunday, February 19, 2006 12:32 AM
To: Harvey Howell
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Checking out noise blanker

On Fri, 17 Feb 2006, Harvey Howell wrote:

 take off the sweater

Lo these many years ago, if I had a noise blanker and could enlist the aid
of some buxom young thing to help with QRN reduction!

Thom
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Re: [Elecraft] Checking out noise blanker

[Tom Althoff]

sweet young thang Are you sure it's ok for me to do this Thommy?
Thom Of course it is sweetheart... I'm a scientist!  This is for the good
of science.
SYT Ok...for the good of science I'll take off the sweater.  But my arms
are getting tired.  This is the 22nd time you had me do this!

- Original Message - 
From: Thom R LaCosta [EMAIL PROTECTED]
To: Harvey Howell [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net
Sent: Sunday, February 19, 2006 3:32 AM
Subject: Re: [Elecraft] Checking out noise blanker


 On Fri, 17 Feb 2006, Harvey Howell wrote:

  take off the sweater

 Lo these many years ago, if I had a noise blanker and could enlist the aid
of
 some buxom young thing to help with QRN reduction!

 Thom

 www.baltimorehon.com/Home of the Baltimore Lexicon
 www.tlchost.net/hosting/ Web Hosting as low as 3.49/month
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Re: [Elecraft] Checking out noise blanker

[Tom Althoff]

oops...sorry group!  That was meant for Thom's amusement only.

- Original Message - 
From: Tom Althoff [EMAIL PROTECTED]
To: Thom R LaCosta [EMAIL PROTECTED]; Harvey Howell
[EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net
Sent: Sunday, February 19, 2006 7:17 PM
Subject: Re: [Elecraft] Checking out noise blanker


 sweet young thang Are you sure it's ok for me to do this Thommy?
 Thom Of course it is sweetheart... I'm a scientist!  This is for the
good
 of science.
 SYT Ok...for the good of science I'll take off the sweater.  But my
arms
 are getting tired.  This is the 22nd time you had me do this!

 - Original Message - 
 From: Thom R LaCosta [EMAIL PROTECTED]
 To: Harvey Howell [EMAIL PROTECTED]
 Cc: elecraft@mailman.qth.net
 Sent: Sunday, February 19, 2006 3:32 AM
 Subject: Re: [Elecraft] Checking out noise blanker


  On Fri, 17 Feb 2006, Harvey Howell wrote:
 
   take off the sweater
 
  Lo these many years ago, if I had a noise blanker and could enlist the
aid
 of
  some buxom young thing to help with QRN reduction!
 
  Thom
 
  www.baltimorehon.com/Home of the Baltimore Lexicon
  www.tlchost.net/hosting/ Web Hosting as low as
3.49/month
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[Elecraft] Checking out noise blanker

[Harvey Howell]

Here is how I checked out the noise blanker in my K1. I have a small antenna in 
the same room as the K1. When I take off my sweater it snaps crackles and pops 
and I can hear it in the speaker. Turn on the noise blanker, take off the 
sweater and no pops in the speaker. I tried it several times. Should work the 
same for the K2.

Harvey
KN6VPNo virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.375 / Virus Database: 267.15.11/264 - Release Date: 2/17/2006
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