Re: [Elecraft] K2 Noise Blanker Problem

[David Woolley (E.L)]

Don Wilhelm wrote:
> 
> First do a test to see if your NB is working at all.  Remove the 
> antenna, turn on the Preamp, then tap on the case of Q21 with a 
> screwdriver.  The taps will create impulse noise in the receiver which 

Has it actually been established that the problem noise is impulsive? 
One of the commonest problems with noise blanking is that people don't 
understand that it is only suitable for wideband, impulsive noise.

-- 
David Woolley
"we do not overly restrict the subject matter on the list, and we
encourage postings on a wide range of amateur radio related topics"
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Re: [Elecraft] K3 NR

[David Woolley (E.L)]

The main source of published research on real time noise reduction of 
audible signals seems to be the hearing aid industry.  I just came 
across this article suggesting that hearing aid noise reduction 
strategies make people think that the noise is less sever, but don't 
actually make the signal any more intelligible.

Trends in Amplification, Volume 10, No. 2, June 2006: Acceptance of 
Background Noise, Mueller et al. 


Obviously being perceptually more desirable is good for marketing, which 
is largely based on feeling, rather than fact, and it may also be of 
value in that, over longer periods, reduced fatigue improves 
performance.  In the hearing aid world, it increases compliance (the 
number of people who actually wear their aids).

On the other hand, if anyone comes up with a algorithm that actually 
increases intelligibility in the "cocktail party" context, I think the 
hearing aid industry would love to know!

-- 
David Woolley
"we do not overly restrict the subject matter on the list, and we
encourage postings on a wide range of amateur radio related topics"
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[Elecraft] K2 Ripple in SSB Filter

[Michael van Hauten]

Hello elecrafters,
after rechecking  all my filters with sprectrogram, i noticed that there is a 
ripple of about 10 db in all SSB filter settings without the OP1 settings. Is 
this normal for this kind of filters. Is it possible to reduce the ripple?

vy 73 Michael, DC0ZO

k2# 6614, k3#1999
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Re: [Elecraft] [K3] K3 NR

[Bill W4ZV]

David Woolley (E.L) wrote:
> 
> The main source of published research on real time noise reduction of 
> audible signals seems to be the hearing aid industry.  I just came 
> across this article suggesting that hearing aid noise reduction 
> strategies make people think that the noise is less sever, but don't 
> actually make the signal any more intelligible.
> 
> Trends in Amplification, Volume 10, No. 2, June 2006: Acceptance of 
> Background Noise, Mueller et al. 
> 
> 

That's an interesting article David!  It agrees with my feelings over the
many years I've tried various types of noise reduction.  Sometimes I think
we're fooled by the level changes introduced by NR, when in fact we could
probably do as well simply by turning AF Gain down a little.  

A few years ago when NQ5T and I both had Orions, I challenged Grant to
measure the actual S/N with NR on and off.  At narrow bandwidths, there was
no difference in measured S/N.  Of course this was for CW where NR simply
builds a narrow filter around a discrete signal.  

I believe a filter is a filter is a filter...whether crystal, DSP or NR. 
There is no magic.

73,  Bill

-- 
View this message in context: http://n2.nabble.com/K3-NR-tp3515659p3541483.html
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Re: [Elecraft] K2 Ripple in SSB Filter

[Don Wilhelm]

Michael,

That kind of ripple is normal when the variable xtal filter is operated 
at wide bandwidths, but it still provides an intelligible signal 
(surprisingly).

Since you are using Spectrogram, check the actual width of those wide 
filters.  Typically on newer K2s the actual width is much wider than 
that indicated by the K2 - there is not much sense in having an FL2 that 
is actually 2800 Hz wide when the FL1 (OP1) filter is 2400 Hz wide.  
Narrow the actual width to something usable (less than the OP1 filter) 
and the ripple will be reduced as the width is reduced.   The easiest 
way is to use LSB - first set the BFO to place the low frequency slope 
of the passband (near 300 Hz) and then change the width and you will see 
the high frequency end of the passband move a lot more than the low 
frequency end.  When you have the actual width correct, record the width 
number on the K2 display.  With a 2400 Hz OP1 filter, I usually 
recommend actual widths of FL2=2200 Hz, FL3=2000 Hz and FL4=1800 Hz.

BTW - this behavoir is the fault of the varactors - the varactors being 
shipped with newer K2s have a greater capacity range than those used 
when the firmware was developed, and it also makes the filter frequency 
charts in the manual incorrect in this respect - use Spectrogram and 
measure the actual width is the only known 'cure' if the firmware is to 
support older K2s as well.

There is not much ripple when the actual width is somewhere between 1200 
and 1600 Hz, and the actual width will more closely track with the K2 
displayed width at settings of 1.00 and less.

73,
Don W3FPR

Michael van Hauten wrote:
> Hello elecrafters,
> after rechecking  all my filters with sprectrogram, i noticed that there is a 
> ripple of about 10 db in all SSB filter settings without the OP1 settings. Is 
> this normal for this kind of filters. Is it possible to reduce the ripple?
>
> vy 73 Michael, DC0ZO
>
> k2# 6614, k3#1999
>   
>
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[Elecraft] K3 NR info

[Hector Padron]

Dear Jonathan,Robin,Ted,Art,David and Bud,the requested info about NR settings 
and MP3 files showing how well it works was sent to all of you.
Gary I sent it to you as well but your address "rfena...@gmail.com" was 
corrupted,it was sent back to me,if you provide me with a pproper addy I will 
resend to you as well.
You all have a good weekend,73

AD4C



"The difference between genius and stupidity is that genius has its limits". -- 
Albert Einstein


  
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[Elecraft] K3 NR settings

[Hector Padron]

Ok Jay yours was sent as well,73

AD4C



"The difference between genius and stupidity is that genius has its limits". -- 
Albert Einstein


  
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[Elecraft] Elecraft SSB Net Announcement

[Phil and Christina]

Hi gang,

The weekly Elecraft SSB net will meet Sunday, 8/30/09 at 1800Z on 14.316
MHz.  Hopefully, we will have good propagation.  See you there.

73,

Phil, NS7P

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Re: [Elecraft] [K3] K3 NR

[Bill W4ZV]

Bill W4ZV wrote:
> 
> 
> 
> David Woolley (E.L) wrote:
>> 
>> The main source of published research on real time noise reduction of 
>> audible signals seems to be the hearing aid industry.  I just came 
>> across this article suggesting that hearing aid noise reduction 
>> strategies make people think that the noise is less sever, but don't 
>> actually make the signal any more intelligible.
>> 
>> Trends in Amplification, Volume 10, No. 2, June 2006: Acceptance of 
>> Background Noise, Mueller et al. 
>> 
>> 
> 
> That's an interesting article David!  It agrees with my feelings over the
> many years I've tried various types of noise reduction.  Sometimes I think
> we're fooled by the level changes introduced by NR, when in fact we could
> probably do as well simply by turning AF Gain down a little.  
> 
> A few years ago when NQ5T and I both had Orions, I challenged Grant to
> measure the actual S/N with NR on and off.  At narrow bandwidths, there
> was no difference in measured S/N.  Of course this was for CW where NR
> simply builds a narrow filter around a discrete signal.  
> 

This was for Orion II,  but for anyone interested, here's the summary by
Grant NQ5T:

http://lists.contesting.com/archives//html/TenTec/2006-03/msg01118.html

On March 25, 2006, NQ5T wrote:

[TenTec] Orion II NR Performance Measurements

I won't bore you with the setup here, but will be happy to provide details
to anyone who is interested.  Consistent results were obtained by two
independent methods: (1) graphical computation of SNNR, and (2) spectral
analysis software that directly computes an estimate of SNR.

The results are as follows (LCW, 1000Hz spot tone, NR=9)  

BW=3000Hz: SNNR improves by approx 1dB with NR=9.

BW=500Hz:  SNNR degrades by approx 2dB with NR=9.

There is improvement at 3 Khz bandwidth, but it's negligible.  At 500 Hz
(and anything below that as well) you're better off without NR at all.  The
distortion created by NR at any bandwidth in both CW tone and SSB voice is
very unpleasant compared to typical noise reduction products. 

Even without having a v1 Orion to compare with I'm basically moving from the
"uncertain" bench to the "put it back the way it was" bench.

Grant/NQ5T


-- 
View this message in context: http://n2.nabble.com/K3-NR-tp3515659p3542357.html
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[Elecraft] NR settings at AD4C K3 now available at my website

[Hector Padron]

If you guys are interested to see how
I have set my K3 serial 2192 for best performance of the newest FW 3.27
this is what you will have to do:
1-type www.ad4c.com
2-Once you have it opened click on the right green botton named "Downloads"
3-Once you are in the new page,click again on "Downloads- 99 files"
4-Now that you opened the long files directory click on the one that say 
"Elecraft K3" 49 files"
5-Find the file that says "AD4C  K3- 63 files"
6-And finally click on the zip that says "20M stn with and without the NR"
In
that compressed file you will find an audio graph of the freq response
of my K3 receiver with all the settings I do use,also you will find a
word with the explanation of all the settings and finally there are six
MP3 files showing the band noise,SSB stations and CW stations with and
without the NR engaged.
Hope this help you out to know your K3 better and enjoy as much as I am,73 to 
all and enjoy your weekend,73

AD4C

"The difference between genius and stupidity is that genius has its limits". -- 
Albert Einstein


  
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Re: [Elecraft] [K3] K3 NR

[Vic K2VCO]

Bill W4ZV wrote:

[about NR and SNR]

I've been watching this thread with interest. For a few years and several 
different 
radios, I've been repeating the same test:

1) Tune around with a bandwidth of about 400 Hz. Find a weak CW signal close to 
the noise 
which I can't copy 100%.

2) Try all the possible techniques to improve intelligibility, looking for the 
ones that 
improve the percentage of copy.

Here is what I've learned:

1) If there is a kind of noise that a NB will reduce, that helps.

2) If there is not too much noise, reducing the bandwidth further helps. I 
sometimes go 
down to 50 Hz. on the K3. But on a noisy band this makes it worse.

3) AFX doesn't matter one way or the other.

4) Dual-diversity reception (polarization diversity) *REALLY* helps. IMHO this 
is one of 
the K3's greatest features.

5) NR doesn't help with the weakest signals.

6) I can't decide what pitch is best. Usually I use around 500 Hz. but that's 
because I 
like the sound of it.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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[Elecraft] K2

[Jack Hubbard]

WTB hand mike for K2
Jack, NI8N



  
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Re: [Elecraft] [K3] VFO tuning noise reduction mod results?

[Joe Planisky]

It seems you were right, Eric.  I had my K3 open for surgery recently  
to install the KRX3.  Of course, that involved lots of repositioning  
of the coax cables.  I also took the opportunity to make sure all the  
internal screws were tight.  When I got everything back together, the  
encoder noise on 10M was gone (at both SPI 1 and 2).  I still had a  
little at the bottom end of 6M, but setting SPI 2 completely  
eliminated it.  I'm happy.

73
--
Joe KB8AP


On Aug 26, 2009, at 10:28 AM, Eric Swartz - WA6HHQ, Elecraft wrote:

> [...]
> this can also be impacted by how you built the K3. The tightness of  
> screws and proper grounding of the PC boards can impact this, as can  
> the location of the synth to mixer coax cables. Seethe manual for  
> proper location.
>
> 73, Eric  WA6HHQ
>
>
>
> Joe Planisky wrote:
>> I have the VFO encoder noise on the low end of 10M.  Yesterday, I   
>> applied the VFO tuning noise reduction mod and switched to SPI 2  
>> in  CONFIG:VCO MD.  That seems to have reduced the tuning noise a  
>> little,  but not as much as I'd expected (or hoped).
[...]
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[Elecraft] K3 NB & NR

[Richard Squire]

I recently had an issue with electric fences (living in a rural environment),
the AGC PLS did not seem to make a lot of a difference and the noise blanker
was unable to mask the loud clicks.
Now with Beta 3.27, while everyone is talking about noise reduction, I
notice that the noise blanker can suppress the strongest fence clicks and
the AGC PLS does make a (big) difference! Quite a change...
I do not remember reading anything about this but it seems not only the NR
was improved.
Thanks!
Richard - HB9ANM
-- 
View this message in context: 
http://n2.nabble.com/K3-NB-NR-tp3542607p3542607.html
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Re: [Elecraft] K3 NR triggering

[Eric Swartz -WA6HHQ, Elecraft]

Just to reiterate my earlier posting, the next beta release of the K3 
mcu/dsp code will have -BOTH- NR methods available. (Those from 3.25 and 
3.27. ) You really -can- have it your way. :-)

You will be able to scan though the same 16 3.27 settings as now, 
followed by the set of 16 3.25 style settings as you rotate the knob 
when setting NR level. Plus the last NR setting for CW and Voice modes 
will be saved independently.

Who says we don't try harder in Aptos? ;-)

73, Eric


Wayne Adams wrote:
> I agree with N6MQL, after working with 3.27 awhile now, 3.25 made CW better.
> I only have the 250Hz filter, and it doesn't do as well with NR as wide
> settings... and the wide filter setting makes the NR shine. It may even work
> better than 3.25 NR narrow overall, I don't know.
>
> ...
>   
> Wayne/WA9VEE
>
> _..._
>   
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Re: [Elecraft] NR settings at AD4C K3 now available at my website

[Steve Ellington]

Nice job. The file is AD4C K3-33, not 63...I listened to all your files. In 
every case, SSB was harder to understand (muffled) with the NR on and in 
spite of the noise, much easier to understand with NR off.  CW sounded great 
with NR on. My opinion.
Steve
N4LQ
n...@carolina.rr.com
- Original Message - 
From: "Hector Padron" 
To: 
Sent: Saturday, August 29, 2009 10:52 AM
Subject: [Elecraft] NR settings at AD4C K3 now available at my website


If you guys are interested to see how
I have set my K3 serial 2192 for best performance of the newest FW 3.27
this is what you will have to do:
1-type www.ad4c.com
2-Once you have it opened click on the right green botton named "Downloads"
3-Once you are in the new page,click again on "Downloads- 99 files"
4-Now that you opened the long files directory click on the one that say 
"Elecraft K3" 49 files"
5-Find the file that says "AD4C K3- 63 files"
6-And finally click on the zip that says "20M stn with and without the NR"
In
that compressed file you will find an audio graph of the freq response
of my K3 receiver with all the settings I do use,also you will find a
word with the explanation of all the settings and finally there are six
MP3 files showing the band noise,SSB stations and CW stations with and
without the NR engaged.
Hope this help you out to know your K3 better and enjoy as much as I am,73 
to all and enjoy your weekend,73

AD4C

"The difference between genius and stupidity is that genius has its 
limits". -- Albert Einstein



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[Elecraft] An "S3" speaker ... more

[Ken Kopp]

BlankAn "S3" speaker in the P3 cabinet -with- the already-designed 
AF1 audio filter integrated into the box would meet the needs
of those wanting an audio filter.  Something along the lines
of the external speaker for the Yaesu FT-1000D / FT-990's,
for example.

Ken Kopp - K0PP
elecraftcov...@rfwave.net
http://tinyurl.com/7lm3m5
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Re: [Elecraft] K3 NR

[Guy Olinger K2AV]

That is really very good reading, if highly technical. Helps to make a
little index card with all the abbreviations used.

One thing clearly suggested by the article is that immense efforts to tailor
the K3 NR based upon complaints/praise, or measurable improvement of
intelligibility, are, stated simply, doomed to failure absent a breakthrough
invention in DNR that would make the patent holder rich.

I'd just as soon see Lyle get rich as someone I don't know, so keep at it
:>)

I have done some amount of testing on NR. My earlier conclusions, fuzzy
compared to the article, are similar.  For a weak CW signal in the noise, NR
is more likely to DEGRADE intelligibility. The article attributes this kind
of thing to a masking effect.

NR makes listening to signals in noise more tolerable, until the signal
becomes masked, then it gets in the way.

Using NR, all signals will degrade vs. no NR at and below the masking point.
Note that for contesting, these are the QSO's which make the winners. Those
who can hear these difficult signals will get stuff others can't.

There are similar issues with what some mistakenly call ringing. The narrow
CW bandwidths in a noisy band situation will produce a constant "narrow
noise" which competes for attention if the listener finds it irritating. It
seems to be particularly irritating for those who tend to mentally
demodulate the signal in a wide bandwidth.

My own explanation for those who hear this way is that the wide bandwidth
allows them TO IDENTIFY THE NOISE in their mind, assigning it a
pseudo-diversity, ignore it and thus separate the CW.  I surmise that for
them, in the narrow situation, THE CW SOUNDS LIKE THE NOISE.

Identifying the CW by throwing away the noise seems the case in diversity
RX, where a fairly real sounding pseudo-spatial diversity spreads around
non-discrete signals, but leaves the desired signal focused. Diversity RX is
the only setup where narrow bandwidths have a way to spread the noise
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Re: [Elecraft] NR settings at AD4C K3 now available at my website

[Bill W5WVO]

Ditto that. The CW performance sounds awesome. SSB... Better with it turned off.
Bill W5WVO

Steve Ellington wrote:
> Nice job. The file is AD4C K3-33, not 63...I listened to all your
> files. In every case, SSB was harder to understand (muffled) with the
> NR on and in spite of the noise, much easier to understand with NR
> off.  CW sounded great with NR on. My opinion.
> Steve
> N4LQ
> n...@carolina.rr.com
> - Original Message -
> From: "Hector Padron" 
> To: 
> Sent: Saturday, August 29, 2009 10:52 AM
> Subject: [Elecraft] NR settings at AD4C K3 now available at my website
> 
> 
> If you guys are interested to see how
> I have set my K3 serial 2192 for best performance of the newest FW
> 3.27 this is what you will have to do:
> 1-type www.ad4c.com
> 2-Once you have it opened click on the right green botton named
> "Downloads" 3-Once you are in the new page,click again on "Downloads-
> 99 files" 4-Now that you opened the long files directory click on the
> one that say "Elecraft K3" 49 files"
> 5-Find the file that says "AD4C K3- 63 files"
> 6-And finally click on the zip that says "20M stn with and without
> the NR" In
> that compressed file you will find an audio graph of the freq response
> of my K3 receiver with all the settings I do use,also you will find a
> word with the explanation of all the settings and finally there are
> six 
> MP3 files showing the band noise,SSB stations and CW stations with and
> without the NR engaged.
> Hope this help you out to know your K3 better and enjoy as much as I
> am,73 to all and enjoy your weekend,73
> 
> AD4C
> 
> "The difference between genius and stupidity is that genius has its
> limits". -- Albert Einstein
> 
> 
> 
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Re: [Elecraft] K3 NB & NR

[Merv Schweigert]

I have had some results like Richard,   on 40 meters the Chinese dragon
has been active again and in the past the K3 is useless against this type
of radar.  Much to my surprise it blanked the Dragon this time,  I have
some distant power line noise that I was also never able to blank and
now the K3 blanks that decently as well. 
I do not think there was any mention of changes in the NB and perhaps
there ware none directly,  but there sure have been some side effects in
any case,  works much better than before at least on this K3.
73 Merv KH7C
> I recently had an issue with electric fences (living in a rural environment),
> the AGC PLS did not seem to make a lot of a difference and the noise blanker
> was unable to mask the loud clicks.
> Now with Beta 3.27, while everyone is talking about noise reduction, I
> notice that the noise blanker can suppress the strongest fence clicks and
> the AGC PLS does make a (big) difference! Quite a change...
> I do not remember reading anything about this but it seems not only the NR
> was improved.
> Thanks!
> Richard - HB9ANM
>   

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Re: [Elecraft] NR settings at AD4C K3 now available at my website

[Matt Zilmer]

I'm still evaluating the NR settings here.  On strong SSB signals, it
sounds OK to me, but seems to limit or compress weaker voice signals.
I've been pleased with the improvement to CW signals, though the
settings available don't seem to change output characteristics much on
a strong CW signal.  Probably no surprise.  Intelligibility is much
better on F1-1 with weaker CW signals.

MP3 files aren't necessarily the best way to hear voice.  The masking
(or compression) is pretty good for rock music, but tends to cut out a
lone voice.  Or "classical" music, which gets cut down a lot in terms
of the dynamics.  MP3 probably works well for CW though.

For voice comparisons I've done / seen in the past, WAV files work ok.
Does anyone have more input on MP3 vs WAV?

73,
matt W6NIA
K3 # 24

On Sat, 29 Aug 2009 10:36:15 -0600, you wrote:

>Ditto that. The CW performance sounds awesome. SSB... Better with it turned 
>off.
>Bill W5WVO
>
>Steve Ellington wrote:
>> Nice job. The file is AD4C K3-33, not 63...I listened to all your
>> files. In every case, SSB was harder to understand (muffled) with the
>> NR on and in spite of the noise, much easier to understand with NR
>> off.  CW sounded great with NR on. My opinion.
>> Steve
>> N4LQ
>> n...@carolina.rr.com
>> - Original Message -
>> From: "Hector Padron" 
>> To: 
>> Sent: Saturday, August 29, 2009 10:52 AM
>> Subject: [Elecraft] NR settings at AD4C K3 now available at my website
>> 
>> 
>> If you guys are interested to see how
>> I have set my K3 serial 2192 for best performance of the newest FW
>> 3.27 this is what you will have to do:
>> 1-type www.ad4c.com
>> 2-Once you have it opened click on the right green botton named
>> "Downloads" 3-Once you are in the new page,click again on "Downloads-
>> 99 files" 4-Now that you opened the long files directory click on the
>> one that say "Elecraft K3" 49 files"
>> 5-Find the file that says "AD4C K3- 63 files"
>> 6-And finally click on the zip that says "20M stn with and without
>> the NR" In
>> that compressed file you will find an audio graph of the freq response
>> of my K3 receiver with all the settings I do use,also you will find a
>> word with the explanation of all the settings and finally there are
>> six 
>> MP3 files showing the band noise,SSB stations and CW stations with and
>> without the NR engaged.
>> Hope this help you out to know your K3 better and enjoy as much as I
>> am,73 to all and enjoy your weekend,73
>> 
>> AD4C
>> 
>> "The difference between genius and stupidity is that genius has its
>> limits". -- Albert Einstein
>> 
>> 
>> 
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Re: [Elecraft] K3 NR

[N2TK]

Typo. Tnx Don for picking that up. Yes, I mean NR. I like the way the NB
works. 

I do see a reduction in audio when turning on the NR with SSB. As an
example, I usually have the AF control around 9-9:30 position using an
external speaker or my Heil headphones. When I turn on the NR I have to use
around 10:30-11:00 position for the same audio. This is using F1-1. As I
increase (Fx-y) X from one to 4 the audio level reduces. As I increase Y
from one to 4 the audio level also decreases. So if I go to F4-4 I have to
crank the AF control fully CW and I still am not at the audio level I was
with the NR OFF and the AF control at 9:30.  Also I can definitely pull out
weak SSB signals better with the NR OFF. Right now the noise level is low,
so not sure what impact that is having.
With CW I do not need to change the AF level. I do like the way the NR works
on CW.
Typically I have the RF gain control fully CW or close to this position.
When running I don't want to be fiddling with knobs or get my ears blown
off.
Both $1435 and #311 behave the same.

I still like the Icom 756Pro III's NR better. I find I can leave the NR ON
at a low level to just take the background noise away without causing issues
or artifacts with received signals. 

Because  of the  varying comments on how the latest NR is behaving I am
wondering if there are any other parameters, especially with the AGC that
would account for these wide variations?

Work in progress.

73,
N2TK, Tony


-Original Message-
From: Don Wilhelm [mailto:w3...@embarqmail.com] 
Sent: Friday, August 28, 2009 7:48 PM
To: N2TK
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 NR

Tony,

Did you mean "NR" when you stated "NB"?  I find no audio reduction when 
turning on the NB unless I have the IF NB cranked up to maximum.

I first thought the new NR was reducing the audio, but I found it was 
not so when one is tuned to a signal. The noise reduction is so 
effective that in my case it almost behaves like a squelch because there 
is not band noise at all (my noise level is not usually very high 
anyway) - so there is a natural tendency to turn up the audio gain 
because there is no noise to hear - but when a signal is present, the 
audio is then LOUD.
As I have stated in prior posts, I *do* find a bit of AF reduction on 
SSB if I have the NR set to F3-x or F4-x, but I find NR on SSB quite 
effective at the F1-x or F2-x settings.

73,
Don W3FPR

N2TK wrote:
> Also it would be nice if the audio didn't reduce in volume when turning on
> the NB.
>  
>
>   
>

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Re: [Elecraft] K3 NB & NR

[Bob Cunnings]

Which noise blanker are you and Richard talking about - the hardware
blanker or the DSP blanker?

Bob NW8L

On Sat, Aug 29, 2009 at 10:48 AM, Merv Schweigert wrote:
> I have had some results like Richard,   on 40 meters the Chinese dragon
> has been active again and in the past the K3 is useless against this type
> of radar.  Much to my surprise it blanked the Dragon this time,  I have
> some distant power line noise that I was also never able to blank and
> now the K3 blanks that decently as well.
> I do not think there was any mention of changes in the NB and perhaps
> there ware none directly,  but there sure have been some side effects in
> any case,  works much better than before at least on this K3.
> 73 Merv KH7C
>> I recently had an issue with electric fences (living in a rural environment),
>> the AGC PLS did not seem to make a lot of a difference and the noise blanker
>> was unable to mask the loud clicks.
>> Now with Beta 3.27, while everyone is talking about noise reduction, I
>> notice that the noise blanker can suppress the strongest fence clicks and
>> the AGC PLS does make a (big) difference! Quite a change...
>> I do not remember reading anything about this but it seems not only the NR
>> was improved.
>> Thanks!
>> Richard - HB9ANM
>>
>
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[Elecraft] Collins 30L-1 amp with the K3

[Butch Schartau]

I want to use a Collins 30L-1 amp with my K3, when I plug the 30L-1 amp
control cable into the K3 KEY OUT jack, the 30L-1 keys.  The 30L-1 is keyed
by grounding it's key line (pulling -160 DC to ground).  The K3 specs says
+200 VDC, at 5 amps, I guess the K3 does not like the minus voltage on the
30L-1 key line, any suggestion other than an external relay?

Butch K0BS
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Re: [Elecraft] K3 NR

[Bob Cunnings]

I'm running 3.27/2.25 on K3 #569, mostly CW. No EQ, default AGC settings.

The NR is so improved (for CW at least) with this version that for the
first time I'm tempted to actually use it!. Normally I simply reduce
DSP BW to overcome noise when working the weaker CW signals, but like
to use a relatively wide BW when tuning around or copying the stronger
signals. Yes, a filter is a filter but the NR artifacts are so minimal
now that I can leave the BW at 800 Hz or so (I have the 1kHz roofing
filter) and just turn on the NR ( I also like F1-3) if the band noise
becomes too great. Give it a couple of seconds to converge and the
noise vanishes yet all but the very weakest signals in the passband
remain, with minimal distortion.

Good work!

Bob NW8L

On Fri, Aug 28, 2009 at 5:26 PM, John E. Reiser wrote:
> I'm running version 3.27/2.25 on K3 #384.  I live in a high noise suburb of
> NYC.  When I tap the NR button, the noise just about disappears, and the
> signal remains, SSB or CW.  Magic!
>
> The difference is more noticeable on SSB, of course, because I usually have
> the pass band set to 500 Hz for CW.
>
> My favorite NR setting is F1-3.  I seldom change from that setting anymore.
> I don't use EQ.
>
> I operate 90% CW and RTTY.  When I do operate SSB, I'm not too concerned
> about audio frequency response.  If I can understand what the other guy is
> saying, I conclude that I've got him tuned in OK.
>
> When I want hi-fi, I get out the IPod_ hi!  But, don't be mad at me.  That's
> just me.  I respect all differing opinions.  Maybe I'm just not as
> discerning as some folks.
>
> 73,  John, W2GW
>
>
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Re: [Elecraft] K3 NR

[.k8dd.]

Tony .

Yeah, I couldn't have said it better about the NR as it is now - you 
nailed it.  See what the next few DSP f/w's have!

I had an IC 746 (not PRO) - the NR on it was great  and it was just 
that - Noise Reduction, pure and simple.  We took it to V47 about 6 
years ago and it was almost as good as the K2/100 w/o the KDSP2.  Wish 
I'd have never sold the 746!

73HankK8DD



N2TK wrote:

> I do see a reduction in audio when turning on the NR with SSB. As an
> example, I usually have the AF control around 9-9:30 position using an
> external speaker or my Heil headphones. When I turn on the NR I have to use
> around 10:30-11:00 position for the same audio. This is using F1-1. As I
> increase (Fx-y) X from one to 4 the audio level reduces. As I increase Y
> from one to 4 the audio level also decreases. So if I go to F4-4 I have to
> crank the AF control fully CW and I still am not at the audio level I was
> with the NR OFF and the AF control at 9:30.  Also I can definitely pull out
> weak SSB signals better with the NR OFF. Right now the noise level is low,
> so not sure what impact that is having.
> With CW I do not need to change the AF level. I do like the way the NR works
> on CW.
> Typically I have the RF gain control fully CW or close to this position.
> When running I don't want to be fiddling with knobs or get my ears blown
> off.
> Both $1435 and #311 behave the same.
> 
> I still like the Icom 756Pro III's NR better. I find I can leave the NR ON
> at a low level to just take the background noise away without causing issues
> or artifacts with received signals. 
> 
> Because  of the  varying comments on how the latest NR is behaving I am
> wondering if there are any other parameters, especially with the AGC that
> would account for these wide variations?
> 
> Work in progress.
> 
> 73,
> N2TK, Tony
> 
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[Elecraft] Uncontrolled full volume with NR Firmware 3.27

[Bob Allen]

An odd thing happened today, I was tuning through an area on 20m where I 
have a birdie, about 14.270-14.273.
The noise reduction was on at 1-3 I think, I don't know what state the 
notch filter was at or the noise blanker, as I tuned into this area the 
audio was a bit odd, like screechy, I didn't think to much of that 
because of how the noise reduction works around birdies, but it was 
different than I had heard in the past.
All of a sudden the volume in the headset and the internal speaker went 
to max and turning the volume control had no effect.
I shutdown the radio to avoid damaging things and when I turned it back 
on everything was fine and I can't make it do this again.
Very odd (and painful), wondering if this has happened to anyone else.
Bob
KB1FRW
73
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[Elecraft] Connecting P3 to K2/100...

[STEPHEN W BANKS]

Hi everyone.

I'm out of date with with recent list correspondence, but does anyone happen to 
know how or if the P3 device can be used with a K2?  The P3-K3 interconnect 
photos are certainly appealing, but I'm not a K3 user.  I assume that an IF 
interconnection would be required for the K2, but that's about all I can piece 
together from what little I've learned.

Any thoughts or archives suggestions?

73,

Steve Banks
K0PQ
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Re: [Elecraft] Collins 30L-1 amp with the K3

[Don Wilhelm]

Butch,

The HEXFET used in the K3 KEY OUT circuit has a diode to protect against 
negative voltage excursions.  I do not know how much negative voltage it 
will stand, but it is possible you exceeded the limit.  That diode 
conducting is the reason your amp was keyed every time you plugged it 
into KEY OUT.

You can check to see if the K3 KEY OUT still works OK with an ohmmeter - 
you should have an open circuit during receive - then use TX TEST and 
again check the resistance at KEY OUT - it should be near zero.

Yes, an external relay would be a good solution, or modify the amplifier 
in some way to key it by grounding a positive voltage.

Checking the specs for the devices on both ends of the cable before 
plugging that cable in is always a good idea.

73,
Don W3FPR

Butch Schartau wrote:
> I want to use a Collins 30L-1 amp with my K3, when I plug the 30L-1 amp
> control cable into the K3 KEY OUT jack, the 30L-1 keys.  The 30L-1 is keyed
> by grounding it's key line (pulling -160 DC to ground).  The K3 specs says
> +200 VDC, at 5 amps, I guess the K3 does not like the minus voltage on the
> 30L-1 key line, any suggestion other than an external relay?
>
> Butch K0BS
>   
>
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Re: [Elecraft] K3 NB & NR

[Richard Squire]

Bob Cunnings wrote:
> 
> Which noise blanker are you and Richard talking about - the hardware
> blanker or the DSP blanker?
> 
> Bob NW8L
> 
> On Sat, Aug 29, 2009 at 10:48 AM, Merv Schweigert wrote:
>> I have had some results like Richard,   on 40 meters the Chinese dragon
>> has been active again and in the past the K3 is useless against this type
>> of radar.  Much to my surprise it blanked the Dragon this time,  I have
>> some distant power line noise that I was also never able to blank and
>> now the K3 blanks that decently as well.
>> I do not think there was any mention of changes in the NB and perhaps
>> there ware none directly,  but there sure have been some side effects in
>> any case,  works much better than before at least on this K3.
>> 73 Merv KH7C
>>> I recently had an issue with electric fences (living in a rural
>>> environment),
>>> the AGC PLS did not seem to make a lot of a difference and the noise
>>> blanker
>>> was unable to mask the loud clicks.
>>> Now with Beta 3.27, while everyone is talking about noise reduction, I
>>> notice that the noise blanker can suppress the strongest fence clicks
>>> and
>>> the AGC PLS does make a (big) difference! Quite a change...
>>> I do not remember reading anything about this but it seems not only the
>>> NR
>>> was improved.
>>> Thanks!
>>> Richard - HB9ANM
>>>
>>
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Re: [Elecraft] K3 NB & NR

[Richard Squire]

Bob,
Both! But mainly the AGC PLS which has become very effective

Richard - HB9ANM


Richard Squire wrote:
> 
> 
> 
> Bob Cunnings wrote:
>> 
>> Which noise blanker are you and Richard talking about - the hardware
>> blanker or the DSP blanker?
>> 
>> Bob NW8L
>> 
>> On Sat, Aug 29, 2009 at 10:48 AM, Merv Schweigert wrote:
>>> I have had some results like Richard,   on 40 meters the Chinese dragon
>>> has been active again and in the past the K3 is uselessoth!  against
>>> this type
>>> of radar.  Much to my surprise it blanked the Dragon this time,  I have
>>> some distant power line noise that I was also never able to blank and
>>> now the K3 blanks that decently as well.
>>> I do not think there was any mention of changes in the NB and perhaps
>>> there ware none directly,  but there sure have been some side effects in
>>> any case,  works much better than before at least on this K3.
>>> 73 Merv KH7C
 I recently had an issue with electric fences (living in a rural
 environment),
 the AGC PLS did not seem to make a lot of a difference and the noise
 blanker
 was unable to mask the loud clicks.
 Now with Beta 3.27, while everyone is talking about noise reduction, I
 notice that the noise blanker can suppress the strongest fence clicks
 and
 the AGC PLS does make a (big) difference! Quite a change...
 I do not remember reading anything about this but it seems not only the
 NR
 was improved.
 Thanks!
 Richard - HB9ANM

>>>
>>> __
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> 
> 

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Re: [Elecraft] Uncontrolled full volume with NR Firmware 3.27- Warning very loud!!

[Bob W Allen]

Now I can make this happen repeatedly, with the NR at 1-4 and the notch 
filter on auto as I tune across the birdie the volume goes very loud, it 
is louder  than any noise I can get the radio to do normally with the AF 
all the way up.
 I have discovered that this only does this in the NR 1-1 to 1-4 range, 
very repeatable. As you tune through the birdie the radio starts making 
a noise like caddisflies (moderate high pitched fast oscillation) then 
it becomes very loud white noise. I don't spend anytime playing with the 
controls but I know the AF does nothing.
I copied this to Elecraft tech support.
MCU (uC) 03.27, main DSP (d1)2.24, aux DSP (d2, if KRX3 is present), 
flash parameters (FL)01.02, and KDVR3 controller (dr )01.03.
This is very loud, be careful!!
Bob
KB1FRW
73

Bob Allen wrote:
> An odd thing happened today, I was tuning through an area on 20m where I 
> have a birdie, about 14.270-14.273.
> The noise reduction was on at 1-3 I think, I don't know what state the 
> notch filter was at or the noise blanker, as I tuned into this area the 
> audio was a bit odd, like screechy, I didn't think to much of that 
> because of how the noise reduction works around birdies, but it was 
> different than I had heard in the past.
> All of a sudden the volume in the headset and the internal speaker went 
> to max and turning the volume control had no effect.
> I shutdown the radio to avoid damaging things and when I turned it back 
> on everything was fine and I can't make it do this again.
> Very odd (and painful), wondering if this has happened to anyone else.
> Bob
> KB1FRW
> 73
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Re: [Elecraft] Uncontrolled full volume with NR Firmware 3.27

[Dan Atchison]

This same thing happened to me this morning.  I had headphones on and it 
really caught me by surprise.  I passed it off as something I probably 
did, but apparently it is an issue.  I may have been at the same NR 
selection, too.  Very odd.

Dan -- N3ND
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[Elecraft] Memory Problem

[Joe G]

I am trying to use M1-M4 for frequency recall (DVR not installed).

I pick a frequency, tap V>M, TAP M1. I then put in a new frequency, tap M>V
and tap M1.

I then see a message NOT SET with no frequency change.

Can anyone tell me what I am doing wrong

Joe
W1JGS

-
Joe
W1JGS
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Re: [Elecraft] Collins 30L-1 amp with the K3

[Eric Swartz WA6HHQ - Elecraft]

HiButch,

Do not hook the K3 directly to the 30L-1. The K3 only switches positive 
voltages to ground on TX. Hooking up a negative voltage will not work 
and may damage the Keyout keying transistor.

An external relay or a negative voltage keying transistor buffer are the 
best ways to do this.

Butch Schartau wrote:
> I want to use a Collins 30L-1 amp with my K3, when I plug the 30L-1 amp
> control cable into the K3 KEY OUT jack, the 30L-1 keys.  The 30L-1 is keyed
> by grounding it's key line (pulling -160 DC to ground).  The K3 specs says
> +200 VDC, at 5 amps, I guess the K3 does not like the minus voltage on the
> 30L-1 key line, any suggestion other than an external relay?
>
> Butch K0BS
>   
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Re: [Elecraft] Uncontrolled full volume with NR Firmware 3.27- Warning very loud!!

[Eric Swartz WA6HHQ - Elecraft]

Please download the latest beta test code off the web site 
(k3fw3r27a.zip) and replace the DSP 2.24 code with the newer 2.25 DSP 
code. (The mcu version stays the same.) 

This is the issue we addressed when we changed the dsp from 2.24 to 2.25 
late in the week.

73, Eric


Bob W Allen wrote:
> Now I can make this happen repeatedly, with the NR at 1-4 and the notch 
> filter on auto as I tune across the birdie the volume goes very loud, it 
> is louder  than any noise I can get the radio to do normally with the AF 
> all the way up.
>  I have discovered that this only does this in the NR 1-1 to 1-4 range, 
> very repeatable. As you tune through the birdie the radio starts making 
> a noise like caddisflies (moderate high pitched fast oscillation) then 
> it becomes very loud white noise. I don't spend anytime playing with the 
> controls but I know the AF does nothing.
> I copied this to Elecraft tech support.
> MCU (uC) 03.27, main DSP (d1)2.24, aux DSP (d2, if KRX3 is present), 
> flash parameters (FL)01.02, and KDVR3 controller (dr )01.03.
> This is very loud, be careful!!
> Bob
> KB1FRW
> 73
>
> Bob Allen wrote:
>   
>> An odd thing happened today, I was tuning through an area on 20m where I 
>> have a birdie, about 14.270-14.273.
>> The noise reduction was on at 1-3 I think, I don't know what state the 
>> notch filter was at or the noise blanker, as I tuned into this area the 
>> audio was a bit odd, like screechy, I didn't think to much of that 
>> because of how the noise reduction works around birdies, but it was 
>> different than I had heard in the past.
>> All of a sudden the volume in the headset and the internal speaker went 
>> to max and turning the volume control had no effect.
>> I shutdown the radio to avoid damaging things and when I turned it back 
>> on everything was fine and I can't make it do this again.
>> Very odd (and painful), wondering if this has happened to anyone else.
>> Bob
>> KB1FRW
>> 73
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Re: [Elecraft] Collins 30L-1 amp with the K3

[Paul Christensen]

> I want to use a Collins 30L-1 amp with my K3, when I plug the 30L-1 amp
> control cable into the K3 KEY OUT jack, the 30L-1 keys.  The 30L-1 is 
> keyed
> by grounding it's key line (pulling -160 DC to ground).

Butch:

Consider this alternative:

http://home.att.net/~jacksonharbor/keyall.htm

It's optically-isolated and keys substantial voltage of either polarity, 
including AC loads up to 2.5 amps.  Perfect for the Collins 30L-1.

Another option is to externally convert the 30L-1 to full QSK operation and 
use an interface like that offered by Ameritron (QSK-5), or Array Solutions' 
"QSK Master."  These two devices should take care of the rig to amp 
interfacing.  If you're into construction projects, see AD5X's related 
construction article on his website.

Paul, W9AC


- Original Message - 
From: "Eric Swartz WA6HHQ - Elecraft" 
To: "Butch Schartau" 
Cc: 
Sent: Saturday, August 29, 2009 3:32 PM
Subject: Re: [Elecraft] Collins 30L-1 amp with the K3


> HiButch,
>
> Do not hook the K3 directly to the 30L-1. The K3 only switches positive
> voltages to ground on TX. Hooking up a negative voltage will not work
> and may damage the Keyout keying transistor.
>
> An external relay or a negative voltage keying transistor buffer are the
> best ways to do this.
>
> Butch Schartau wrote:
The K3 specs says
>> +200 VDC, at 5 amps, I guess the K3 does not like the minus voltage on 
>> the
>> 30L-1 key line, any suggestion other than an external relay?
>>
>> Butch K0BS
>>
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Re: [Elecraft] Memory Problem

[Don Wilhelm]

Joe,

Your exact sequence works for me.
When you say "put in a new frequency" - is that frequency still in the 
same band as you recorded the M1 frequency?  It must be within the same 
band - the M1 thru M4 memories are *per* band.  If you change bands you 
have a different set of 4 memories that can be used.

73,
Don W3FPR

Joe G wrote:
> I am trying to use M1-M4 for frequency recall (DVR not installed).
>
> I pick a frequency, tap V>M, TAP M1. I then put in a new frequency, tap M>V
> and tap M1.
>
> I then see a message NOT SET with no frequency change.
>
> Can anyone tell me what I am doing wrong
>
> Joe
> W1JGS
>   
>
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[Elecraft] K3 NR triggering

[The Smiths]

Eric,
No No no, I have been grossly misinterpreted.  I never asked for a combination 
of 3.25 and 3.27.  BOTH of these NR's are far from aggressive enough for my 
type of Noise floor and Narrow band CW work. Furthermore they take WAY too long 
to build the filters.

 

What I was asking for was the OLD PRE 3.25 NR back, with a combination of the 
Newer 3.25 OR 3.27 for the SSB guys...  What I would like to see, is at 
MINIMUM, the old PRE 3.25 setting # 2-3 come back so I can once again hear VERY 
reduced noise floor with ENHANCED cw tones for the weak DX stations. NOT a 
combination of the two newer less aggressive NR settings that do sl little for 
me.  Man, I hate the telephone game.

 

N6MQL

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[Elecraft] 160M image

[Ken Roberson]

Hello All,

On 160 M when I rotate the RIT knob fast to change
the frequency I have some kind of image, Not sure what
this is ??
This occurred with an Antenna , Dose not occur without an antenna .
I can stop in the signal , and when I rotate the main tuning knob
one increment or so the signal goes away.
This is quite repeatable.
Has anyone else had this problem.
 
Thanks 73 Ken K5DNL

 





  
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Re: [Elecraft] Connecting P3 to K2/100...

[R. Kevin Stover]

Steve,

I'm in the process of acquiring all the parts necessary to run a 
panadapter with the K2. I'll be using my computer/sound card for 
display. I already have a couple of high performance sound cards to 
experiment with.

First piece is the Clifton Laboratories Z-1 Buffer/Amp for the IF 
output. http://www.cliftonlaboratories.com/z1_buffer_amp.htm

Second piece is the LP-Pan from Telepost. 
http://www.telepostinc.com/LP-PAN.html

I have no idea if Elecraft will make the P3 usable for rigs other than 
the K3.

73,

Kevin


STEPHEN W BANKS wrote:
> Hi everyone.
>
> I'm out of date with with recent list correspondence, but does anyone happen 
> to know how or if the P3 device can be used with a K2?  The P3-K3 
> interconnect photos are certainly appealing, but I'm not a K3 user.  I assume 
> that an IF interconnection would be required for the K2, but that's about all 
> I can piece together from what little I've learned.
>
> Any thoughts or archives suggestions?
>
> 73,
>
> Steve Banks
> K0PQ
>
>
>   


-- 
R. Kevin Stover

ACØH

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Re: [Elecraft] Uncontrolled full volume with NR 3.27- The fix

[Bob Allen]

"Please download the latest beta test code off the web site 
(k3fw3r27a.zip) and replace the DSP 2.24 code with the newer 2.25 DSP 
code. (The mcu version stays the same.)
This is the issue we addressed when we changed the dsp from 2.24 to 2.25 
late in the week.

73, Eric"

This was sent from Eric Swartz WA6HHQ at Elecraft, I haven't tried it 
yet but I'll bet it works.
Bob
KB1FRW


Bob W Allen wrote:
> Now I can make this happen repeatedly, with the NR at 1-4 and the notch 
> filter on auto as I tune across the birdie the volume goes very loud, it 
> is louder  than any noise I can get the radio to do normally with the AF 
> all the way up.
>  I have discovered that this only does this in the NR 1-1 to 1-4 range, 
> very repeatable. As you tune through the birdie the radio starts making 
> a noise like caddisflies (moderate high pitched fast oscillation) then 
> it becomes very loud white noise. I don't spend anytime playing with the 
> controls but I know the AF does nothing.
> I copied this to Elecraft tech support.
> MCU (uC) 03.27, main DSP (d1)2.24, aux DSP (d2, if KRX3 is present), 
> flash parameters (FL)01.02, and KDVR3 controller (dr )01.03.
> This is very loud, be careful!!
> Bob
> KB1FRW
> 73
>
> Bob Allen wrote:
>   
>> An odd thing happened today, I was tuning through an area on 20m where I 
>> have a birdie, about 14.270-14.273.
>> The noise reduction was on at 1-3 I think, I don't know what state the 
>> notch filter was at or the noise blanker, as I tuned into this area the 
>> audio was a bit odd, like screechy, I didn't think to much of that 
>> because of how the noise reduction works around birdies, but it was 
>> different than I had heard in the past.
>> All of a sudden the volume in the headset and the internal speaker went 
>> to max and turning the volume control had no effect.
>> I shutdown the radio to avoid damaging things and when I turned it back 
>> on everything was fine and I can't make it do this again.
>> Very odd (and painful), wondering if this has happened to anyone else.
>> Bob
>> KB1FRW
>> 73
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>>   
>> 
>
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Re: [Elecraft] K3 NB & NR

[Merv Schweigert]

Bob,  for me its both,  on the Dragon it takes both to do the job, 
DSP T2-5  and IF Nar 5 removed the Dragon quite well ..
On the distant line noise I can sometimes get by with just the
IF blanker,  but usually takes both there also.  But less aggressive
settings.
Merv KH7C
> Which noise blanker are you and Richard talking about - the hardware
> blanker or the DSP blanker?
>
> Bob NW8L
>
> On Sat, Aug 29, 2009 at 10:48 AM, Merv Schweigert wrote:
>   
>> I have had some results like Richard,   on 40 meters the Chinese dragon
>> has been active again and in the past the K3 is useless against this type
>> of radar.  Much to my surprise it blanked the Dragon this time,  I have
>> some distant power line noise that I was also never able to blank and
>> now the K3 blanks that decently as well.
>> I do not think there was any mention of changes in the NB and perhaps
>> there ware none directly,  but there sure have been some side effects in
>> any case,  works much better than before at least on this K3.
>> 73 Merv KH7C
>> 
>>> I recently had an issue with electric fences (living in a rural 
>>> environment),
>>> the AGC PLS did not seem to make a lot of a difference and the noise blanker
>>> was unable to mask the loud clicks.
>>> Now with Beta 3.27, while everyone is talking about noise reduction, I
>>> notice that the noise blanker can suppress the strongest fence clicks and
>>> the AGC PLS does make a (big) difference! Quite a change...
>>> I do not remember reading anything about this but it seems not only the NR
>>> was improved.
>>> Thanks!
>>> Richard - HB9ANM
>>>
>>>   
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Re: [Elecraft] K3 NR triggering

[Eric Swartz -WA6HHQ, Elecraft]

I may have misspoken.  Re-reading my emails with Wayne and Lyle 
indicates the 'old' NR included in the next release (in addition to the 
current NR method) will be that of DSP 2.22, which I think is what you 
are referring to. :-)

73, Eric


The Smiths wrote:
> Eric,
> No No no, I have been grossly misinterpreted.  I never asked for a 
> combination of 3.25 and 3.27.  BOTH of these NR's are far from aggressive 
> enough for my type of Noise floor and Narrow band CW work. Furthermore they 
> take WAY too long to build the filters.
>
>  
>
> What I was asking for was the OLD PRE 3.25 NR back, with a combination of the 
> Newer 3.25 OR 3.27 for the SSB guys...  What I would like to see, is at 
> MINIMUM, the old PRE 3.25 setting # 2-3 come back so I can once again hear 
> VERY reduced noise floor with ENHANCED cw tones for the weak DX stations. NOT 
> a combination of the two newer less aggressive NR settings that do sl little 
> for me.  Man, I hate the telephone game.
>
>  
>
> N6MQL
>
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-- 

_..._

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[Elecraft] K3_160M_Image

[Ken Roberson]

Hello All,

Sorry I forgot to indicate this is with K3 

On 160 M when I rotate the RIT knob fast to change
the frequency I have some kind of image, Not sure what
this is ??
This occurred with an Antenna , Dose not occur without an antenna .
I can stop in the signal , and when I rotate the main tuning knob
one increment or so the signal goes away.
This is quite repeatable.
Has anyone else had this problem.

Thanks 73 Ken K5DNL




  
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Re: [Elecraft] K3 NR triggering

[Brett Howard]

Man that will be a lot of settings but after reading all the posts I'd
had exactly the same idea but just didn't post it. Having a little
down time here after kayaking back from the neighbors on the other
side of the bay for lunch. Figured I'd look in and catch up. I'm
anxiously awaiting the ability to have all the NR options and the bass
back!
Ok now that I'm mostly caught up the phone goes back off before I
accidentally click on the icon that brings up the work email.

On 8/29/09, Eric Swartz -WA6HHQ, Elecraft  wrote:
> Just to reiterate my earlier posting, the next beta release of the K3
> mcu/dsp code will have -BOTH- NR methods available. (Those from 3.25 and
> 3.27. ) You really -can- have it your way. :-)
>
> You will be able to scan though the same 16 3.27 settings as now,
> followed by the set of 16 3.25 style settings as you rotate the knob
> when setting NR level. Plus the last NR setting for CW and Voice modes
> will be saved independently.
>
> Who says we don't try harder in Aptos? ;-)
>
> 73, Eric
> 
>
> Wayne Adams wrote:
>> I agree with N6MQL, after working with 3.27 awhile now, 3.25 made CW
>> better.
>> I only have the 250Hz filter, and it doesn't do as well with NR as wide
>> settings... and the wide filter setting makes the NR shine. It may even
>> work
>> better than 3.25 NR narrow overall, I don't know.
>>
>> ...
>>
>> Wayne/WA9VEE
>>
>> _..._
>>
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[Elecraft] K3 - Is 2.7k filter required in KRX3?

[Joe Planisky]

I recently installed a KRX3 in my K3.  I currently only have the 13kHZ  
and 400Hz filters installed in it.  (This is a temporary situation as  
I'm waiting for a matched 2.7kHz filter from Elecraft.)  The filters  
are configured correctly according to both the CONFIG menu and the K3  
Utility.

The problem is I get no output from the sub RX when the bandwidth is  
450Hz or 500Hz in CW and DATA modes.

I get continuous output as expected at all bandwidths in SSB mode.

If I configure the 400Hz filter as a 500Hz filter, I get continuous  
output in all modes.

In all cases, I see the FL1 and FL5 icons on the LCD change at the  
appropriate BW settings.

I'm wondering if perhaps the 2.7kHz (or 2.8kHz) filter is required for  
proper operation of the KRX3.  Admittedly this is an unusual  
configuration, and assuming the problem goes away when I plug in the  
2.7k filter, it's no big deal.

I'm running FW 3.27 / DSP 2.25.

73
--
Joe KB8AP

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Re: [Elecraft] Uncontrolled full volume with NR 3.27- NOT The fix

[Bob Allen]

Apparently this was not the fix, they (Lyle and ??) are working on it 
now. Watch out it is a very loud noise especially with the head phones on.
Bob
KB1FRW

Bob Allen wrote:
> "Please download the latest beta test code off the web site 
> (k3fw3r27a.zip) and replace the DSP 2.24 code with the newer 2.25 DSP 
> code. (The mcu version stays the same.)
> This is the issue we addressed when we changed the dsp from 2.24 to 2.25 
> late in the week.
>
> 73, Eric"
>
> This was sent from Eric Swartz WA6HHQ at Elecraft, I haven't tried it 
> yet but I'll bet it works.
> Bob
> KB1FRW
>
>
> Bob W Allen wrote:
>   
>> Now I can make this happen repeatedly, with the NR at 1-4 and the notch 
>> filter on auto as I tune across the birdie the volume goes very loud, it 
>> is louder  than any noise I can get the radio to do normally with the AF 
>> all the way up.
>>  I have discovered that this only does this in the NR 1-1 to 1-4 range, 
>> very repeatable. As you tune through the birdie the radio starts making 
>> a noise like caddisflies (moderate high pitched fast oscillation) then 
>> it becomes very loud white noise. I don't spend anytime playing with the 
>> controls but I know the AF does nothing.
>> I copied this to Elecraft tech support.
>> MCU (uC) 03.27, main DSP (d1)2.24, aux DSP (d2, if KRX3 is present), 
>> flash parameters (FL)01.02, and KDVR3 controller (dr )01.03.
>> This is very loud, be careful!!
>> Bob
>> KB1FRW
>> 73
>>
>> Bob Allen wrote:
>>   
>> 
>>> An odd thing happened today, I was tuning through an area on 20m where I 
>>> have a birdie, about 14.270-14.273.
>>> The noise reduction was on at 1-3 I think, I don't know what state the 
>>> notch filter was at or the noise blanker, as I tuned into this area the 
>>> audio was a bit odd, like screechy, I didn't think to much of that 
>>> because of how the noise reduction works around birdies, but it was 
>>> different than I had heard in the past.
>>> All of a sudden the volume in the headset and the internal speaker went 
>>> to max and turning the volume control had no effect.
>>> I shutdown the radio to avoid damaging things and when I turned it back 
>>> on everything was fine and I can't make it do this again.
>>> Very odd (and painful), wondering if this has happened to anyone else.
>>> Bob
>>> KB1FRW
>>> 73
>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft@mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>>>
>>>
>>>   
>>> 
>>>   
>> __
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>>
>>   
>> 
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>
>   
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[Elecraft] FTP Site Problem?

[bearcat]

Is anybody else unable to download the firmware from the FTP Site?

 

I have not been able to download yesterday or today.

 

Rich

K3RWN

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Re: [Elecraft] FTP Site Problem?

[list1]

I copied the URL and pasted it at the top of IE in the destination box and
then it worked.
Steve, W2MY

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net]on Behalf Of bearcat
Sent: Saturday, August 29, 2009 6:57 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] FTP Site Problem?


Is anybody else unable to download the firmware from the FTP Site?



I have not been able to download yesterday or today.



Rich

K3RWN

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[Elecraft] Sub RX Noise Blanker - 3051

[paulb]

Hi Folks

I can't seem to get the  Sub RX noise blanker to function.
Working fine on the main RX.

When swapping to the Sub the NB icon is not showing and 
cannot be toggled on.

Ver 3.27 

thanks 

Paul 
zl1ajy

-- 
View this message in context: 
http://n2.nabble.com/Sub-RX-Noise-Blanker-3051-tp3544785p3544785.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] An "S3" speaker ... more

[Ken Kopp]

BlankAn "S3" speaker in the P3 cabinet -with- the already-designed 
AF1 audio filter integrated into the box would meet the needs
of those wanting an audio filter.  Something along the lines
of the external speaker for the Yaesu FT-1000D / FT-990's,
for example.

Ken Kopp - K0PP
elecraftcov...@rfwave.net
http://tinyurl.com/7lm3m5
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Re: [Elecraft] Uncontrolled full volume with NR Firmware 3.27- Warning very loud!!

[Steve Ellington]

Bob:
"The Birdie"? What birdie are you speak of that we too might tune across it. 
I have this urge to listen to caddisflies.

Steve
N4LQ
n...@carolina.rr.com
- Original Message - 
From: "Bob W Allen" 
To: ; 
Sent: Saturday, August 29, 2009 3:22 PM
Subject: Re: [Elecraft] Uncontrolled full volume with NR Firmware 3.27- 
Warning very loud!!


> Now I can make this happen repeatedly, with the NR at 1-4 and the notch
> filter on auto as I tune across the birdie the volume goes very loud, it
> is louder  than any noise I can get the radio to do normally with the AF
> all the way up.
> I have discovered that this only does this in the NR 1-1 to 1-4 range,
> very repeatable. As you tune through the birdie the radio starts making
> a noise like caddisflies (moderate high pitched fast oscillation) then
> it becomes very loud white noise. I don't spend anytime playing with the
> controls but I know the AF does nothing.
> I copied this to Elecraft tech support.
> MCU (uC) 03.27, main DSP (d1)2.24, aux DSP (d2, if KRX3 is present),
> flash parameters (FL)01.02, and KDVR3 controller (dr )01.03.
> This is very loud, be careful!!
> Bob
> KB1FRW
> 73
>
> Bob Allen wrote:
>> An odd thing happened today, I was tuning through an area on 20m where I
>> have a birdie, about 14.270-14.273.
>> The noise reduction was on at 1-3 I think, I don't know what state the
>> notch filter was at or the noise blanker, as I tuned into this area the
>> audio was a bit odd, like screechy, I didn't think to much of that
>> because of how the noise reduction works around birdies, but it was
>> different than I had heard in the past.
>> All of a sudden the volume in the headset and the internal speaker went
>> to max and turning the volume control had no effect.
>> I shutdown the radio to avoid damaging things and when I turned it back
>> on everything was fine and I can't make it do this again.
>> Very odd (and painful), wondering if this has happened to anyone else.
>> Bob
>> KB1FRW
>> 73
>> __
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>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
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>>
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>>
>>
>>
>>
>
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[Elecraft] Elecraft CW Net Announcement

[Kevin Rock]

Good Evening,
Another pleasant week.  A few heavy fogs have rolled in off the Pacific 
Ocean and yesterday some real rain.  Today I found the deck wet a couple times 
but never heard it falling.  When I walked outside I could feel very heavy mist 
hit my face but I know this was not a fog rain because it was not just under 
the trees but all over the place.  The fire danger has dropped but there is 
still a ban on burning.  Luckily they don't limit the use of my woodstove.  It 
got chilly enough to start a fire, but only for one day.  Thus far this year I 
have not gone a month without needing some supplemental heat.  Some weeks this 
is just from doing the laundry, or cooking, or even turning on an incandescent 
light, but I have had at least one fire each month of the year.  
Propagation was getting better each day last week so hopefully tomorrow's 
nets will be good.  The sun has been setting much earlier so that will effect 
propagation on 40 meters too.  Only a few more days and we will match the 
longest streak of a spotless sun.  This record was set last July, August, and 
September so we may set the new record during the very same months.  How very 
odd.  Predictions are all over the place so it is much like predicting weather 
in Oregon.  I will stick with my weather rock :)  The only time it has ever 
failed me was when the wind was so strong I never found it again!  Had to get a 
new rock.  But sunspots are not the only means of exciting the ionosphere.  For 
the last few years we have been using those other means to communicate.  Even 
if the sun does not sprout spots we can keep working each other.

Please join us tomorrow evening.
 
1) Hail signs  (first letter or two of the suffix of your call)
2) NCS help  (as well as QSP/QNP  help)

Sunday 2300z (Sunday 4 PM PDT) 14050 kHz
Monday 0100z (Sunday 6 PM PDT)  7045 kHz

   Stay well,
  Kevin.  KD5ONS

-
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[Elecraft] test -sorry

[elelist984]

test
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