Re: [Elecraft] K3S Noise Reduction

[Victor Rosenthal 4X6GP]

I used to complain about the K3's NR functions, but now I have a much 
newer TS-890s sitting next to it, and in comparison, the K3's NB and NR 
are far better. So everything is relative.


73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/

On 07/11/2022 3:33, Richard wrote:

Is there ANY way to make the NR feature work worth a damn? In
general, when I turn it on, the audio level drops to almost nothing,
and none of the Adjustment setting do much of anything.

My other two radios, an old Icom and a new Icom, both have very
effective NR features.

Is this a design heartbreak, or is my radio looking at ANOTHER trip
to the factory?

Firmware # UC 05.67

Cheers.

Richard Kunc W4KBX 
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Re: [Elecraft] K3S Noise Reduction

[Jim Brown]

On 11/6/2022 8:55 PM, Brian Hunt wrote:

I’ve found that, properly adjusted, it works very well on CW but using it on 
SSB created unacceptable “mush” on the audio.


The best NR I've heard, and nothing else was close, was demonstrated to 
me by Warren Pratt, NR0V who is credited with developing Pure Signal. He 
showed it to me on 40M SSB using an ANAN SDR during the day at his QTH 
down the road a few miles from K6XX. It was quite close to being 
transparent, and quite effective.


I've yet to hear a K4 or the current generation of Flex rigs.

73, Jim K9YC





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Re: [Elecraft] K3S Noise Reduction

[Brian Hunt]

There was a very good description of the K3 NR written by Lyle, the DSP 
designer for Elecraft. It may be on their website. 

Basically, as I understand it, the NR is designed to work against random noise. 
Noise that has a correlated component, like line noise, it doesn’t address as 
well. 

I’ve found that, properly adjusted, it works very well on CW but using it on 
SSB created unacceptable “mush” on the audio. 

Hopefully the spectral subtraction NR when available on the K4 will be much 
better. 

73,
Brian, K0DTJ

> On Nov 6, 2022, at 17:34, Richard  wrote:
> 
> Is there ANY way to make the NR feature work worth a damn? In general, when 
> I turn it on, the audio level drops to almost nothing, and none of the 
> Adjustment setting do much of anything.
> 
> My other two radios, an old Icom and a new Icom, both have very effective NR 
> features.
> 
> Is this a design heartbreak, or is my radio looking at ANOTHER trip to the 
> factory?
> 
> Firmware # UC 05.67
> 
> Cheers.
> 
> Richard Kunc
> W4KBX
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[Elecraft] Y-Box For Sale

[Richard Lawn]

I no longer have an Elecraft radio so this Y-Box by N6TV is no longer of
any use. I also have a couple of cables for it. It was set up for me to
config. TX INH to HI=inh GND TX OK to allow RF output. I used it for EME
operation. I have the original configuration diagram by N6TV and I believe
he would return it to the normal wiring state for the cost of postage.

https://www.kkn.net/~n6tv/Y-BOX/

I'm asking $100 shipped anywhere in US.

73
Rick, W2JAZ
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[Elecraft] K3S Noise Reduction

[Richard]

Thanks to all who chimed in about this. I will be trying everyone’s advice.

I still think it’s sad that all I have to do to significantly block noise in 
SSB on my old IC-706MkIIG and my IC-7300 is touch one button: most of the noise 
is gone and the level of the audio itself hasn’t dropped so you could notice.

I’d told this shortcoming as been addressed and corrected in the K4.

Cheers,

Richard
W4KBX
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[Elecraft] Elecraft] KPA1500 5V ERR Fault

[wa3afs]

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[Elecraft] 80M Elecraft SSB Net

[Dave New]

Sundays 9pm ET, 3775 kHz.

THANK YOU to all the folks that checked-in this evening (and THANKS to  
Bill for the relays to Dick in MA)


WB9JNZ Eric IL FT101DX KPA1500
AE6JV  Bill NH K3  (relay)
KG0KP  Jim  MO K3  AL-1500
WO1I   Dick MA K3
AB4IQ  Ed   KY K4D KPA1500
KG9NG  Sam  WI KX2 KXPA100
W8LVN  Bill IL K3s/100
K9YII  Fred IL K3/100
N8SBE  Dave MI K3s KPA500  (net control)

We had a great crowd tonight, and it was very enjoyable learning about  
each station, and folks' experience with their Elecraft gear.


Please look for us next Sunday at 9pm ET on 3775 kHz.

73,

-- Dave, N8SBE





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Re: [Elecraft] K3S Noise Reduction

[Jerry Moore]

There's an extensive procedure in the manual that I bought separately from the 
rig. My stuff is in storage,  however, the process for noise reduction worked 
solid for me. The k3s book from Fred Cady https://elecraft.com/collections/books

Sent from my Verizon, Samsung Galaxy smartphone
Get Outlook for Android

From: elecraft-boun...@mailman.qth.net  on 
behalf of Richard 
Sent: Sunday, November 6, 2022 8:33:08 PM
To: Elecraft Reflector 
Subject: [Elecraft] K3S Noise Reduction

Is there ANY way to make the NR feature work worth a damn? In general, when I 
turn it on, the audio level drops to almost nothing, and none of the Adjustment 
setting do much of anything.

My other two radios, an old Icom and a new Icom, both have very effective NR 
features.

Is this a design heartbreak, or is my radio looking at ANOTHER trip to the 
factory?

Firmware # UC 05.67

Cheers.

Richard Kunc
W4KBX
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Re: [Elecraft] K3S Noise Reduction

[Charles Hill]

Richard,

I saw this explanation of a procedure to adjust the NB from this reflector.  
I’ve tried it and it works.

Also see page 103 of “Getting the Most from Elecraft K3” by Fred Cody KE7X.

73,
Chuck K0MV

The approach I use for the Noise Blanker is this.

I first activate the NB and then the Level.   I start with the DSP OFF and the 
IF OFF.  I then adjust the DSP value for optimum results without it destroying 
the quality of the signal.  DO MAKE A NOTE OF THIS VALUE.  Then set the DSP 
back to OFF.  Then move to the IF and scroll through the settings in an effort 
to find optimum results.  Once this is done, leave the IF value as determined 
and return to the DSP and set it to the value previously determined.

This works for a given band and given type of noise.  Change bands or noise and 
do it all again.  There is no ONE setting correct for every condition.   Right 
now my 6M noise buzz is S-7 with the NB off.  Then turning it ON and adjusted 
as above the 6M noise is S-3.  That's 4 S units or 24 dB improvement.  I doubt 
you will get much better than this.

As to Noise Reduction, I find it best performs for CW mode. Again it takes 
careful adjustment to obtain optimum results.   I don't use NR for SSB signals. 
I prefer to adjust the Attenuation value and the RF Gain to produce optimum 
results when operating SSB.   I find optimum results occur when the no signal 
band noise is about 10 dB above the receiver noise floor.   In order to 
accomplish this operating point, one will need to use ATTENUATION and RF Gain 
reduction.   More gain won't aid in receiving weak signals, but just the 
opposite, as the signal will pop out of the noise.

I generally find using either NB or NR, but not both, is the better way to 
operate.  I doubt there is anything wrong with your radio.  Most likely the 
result is more related to receiver setting parameters.

73

Bob, K4TAX

> On Nov 6, 2022, at 18:33, Richard  wrote:
> 
> Is there ANY way to make the NR feature work worth a damn? In general, when I 
> turn it on, the audio level drops to almost nothing, and none of the 
> Adjustment setting do much of anything.
> 
> My other two radios, an old Icom and a new Icom, both have very effective NR 
> features.
> 
> Is this a design heartbreak, or is my radio looking at ANOTHER trip to the 
> factory?
> 
> Firmware # UC 05.67
> 
> Cheers.
> 
> Richard Kunc
> W4KBX
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[Elecraft] K3S Noise Reduction

[Richard]

Is there ANY way to make the NR feature work worth a damn? In general, when I 
turn it on, the audio level drops to almost nothing, and none of the Adjustment 
setting do much of anything.

My other two radios, an old Icom and a new Icom, both have very effective NR 
features.

Is this a design heartbreak, or is my radio looking at ANOTHER trip to the 
factory?

Firmware # UC 05.67

Cheers.

Richard Kunc
W4KBX
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[Elecraft] Drive Control - K3 and FPA-1500

[Pete Smith N4ZR]

Just finished SS, and on many occasions when switching bands I found 
myself overdriving the KPA-1500 on the new band.  No harm done, but I 
thought the K3/KPA-1500 combination was supposed to manage drive on a 
per-band basis.  Did I get that wrong?


--
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at.
For spots, please use your favorite
"retail" DX cluster.
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[Elecraft] SSB 7180 net, Sunday 1900Z

[Steve Hall]

Thanks to all participating.
WM6P STEVE GA NETCONTROL
K8NU CARL OH
W9EJB ED IN K4D
N8SBE DAVE MI
KF4GGN BRIAN SC
WW4CM CHARLIE AL
WB9JNZ ERIC IL
NK9A STAN MI
W4DML DOUG TN
AE6JV BILL NH
W5CPG SCOTT OK
K5LVS LARY OK
WB4ZAR JOHN NC
KO4FH DON TN
W8ZJT JACH OH
KE4WY JIM KY
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Re: [Elecraft] Elecraft 80M SSB Net Announcement and NO time change

[Dave New]

0200Z Monday

Currently ET is -5 hours from UTC

73,

-- Dave, N8SBE

Quoting jerry :


So at what Zulu time is the Net?

   - Jerry, KF6VB

On 2022-11-06 10:43, Dave New wrote:

A reminder that the Elecraft 80M SSB net meets weekly on Sunday
evening, 9pm ET, on 3775 kHz (Advanced class portion of the band).

There is NO time change for this net, as there are many local nets on
80M that do not change time when we go to/from daylight saving time,
so we 'go with the flow' and keep the same time to avoid conflicts
with other nets that share the same frequency before/after our net.

Hope to see you on 80M SSB this evening.

73,

-- Dave, N8SBE



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Re: [Elecraft] K2 with narrow USB transmit audio

[Don Wilhelm]

Chris,

Yes it would.  You can de-tune a bit to make RX sound OK, but you can't 
do that in transmit.

Make sure the filter selected for SSB is the OP1 filter.

73,
Don W3FPR

On 11/6/2022 2:06 PM, Chris wrote:

Hi Don,

Thank you for the info.  The issue with my K2 is with the transmit 
audio, so would the same BFO frequency for the receiver affect the 
transmitter?


Best,

Chris KM1B


On Sun, Nov 6, 2022 at 1:56 PM Don Wilhelm  wrote:

Chris,

That condition is normally the result of improper alignment of the
BFO
frequencies for the upper sideband.
There should be no difference is width for LSB and USB that could be
blamed on a part.

Use an audio spectrum analyzer (Spectrogram for instance) for best
results when aligning the filters, and set the low frequency
"knee" of
the passband at 300 Hz.  If possible use a broadband noise
generator at
the antenna connection, or you can often use "dead band noise" (no
signals within the bandpass).

73,
Don W3FPR

On 11/5/2022 6:41 PM, Chris wrote:
> Hello,
>
> I have three K2's, and one of them has a very strange symptom. 
It works
> well in LSB and CW, but USB transmit audio seems very narrow. 
Receive
> audio in all modes works well with no issues.
>
>



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Re: [Elecraft] K2 with narrow USB transmit audio

[Chris]

Hi Don,

Thank you for the info.  The issue with my K2 is with the transmit audio,
so would the same BFO frequency for the receiver affect the transmitter?

Best,

Chris KM1B


On Sun, Nov 6, 2022 at 1:56 PM Don Wilhelm  wrote:

> Chris,
>
> That condition is normally the result of improper alignment of the BFO
> frequencies for the upper sideband.
> There should be no difference is width for LSB and USB that could be
> blamed on a part.
>
> Use an audio spectrum analyzer (Spectrogram for instance) for best
> results when aligning the filters, and set the low frequency "knee" of
> the passband at 300 Hz.  If possible use a broadband noise generator at
> the antenna connection, or you can often use "dead band noise" (no
> signals within the bandpass).
>
> 73,
> Don W3FPR
>
> On 11/5/2022 6:41 PM, Chris wrote:
> > Hello,
> >
> > I have three K2's, and one of them has a very strange symptom.  It works
> > well in LSB and CW, but USB transmit audio seems very narrow.  Receive
> > audio in all modes works well with no issues.
> >
> >
>
>
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Re: [Elecraft] Elecraft 80M SSB Net Announcement and NO time change

[jerry]

So at what Zulu time is the Net?

   - Jerry, KF6VB

On 2022-11-06 10:43, Dave New wrote:

A reminder that the Elecraft 80M SSB net meets weekly on Sunday
evening, 9pm ET, on 3775 kHz (Advanced class portion of the band).

There is NO time change for this net, as there are many local nets on
80M that do not change time when we go to/from daylight saving time,
so we 'go with the flow' and keep the same time to avoid conflicts
with other nets that share the same frequency before/after our net.

Hope to see you on 80M SSB this evening.

73,

-- Dave, N8SBE



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Re: [Elecraft] K2 with narrow USB transmit audio

[Don Wilhelm]

Chris,

That condition is normally the result of improper alignment of the BFO 
frequencies for the upper sideband.
There should be no difference is width for LSB and USB that could be 
blamed on a part.


Use an audio spectrum analyzer (Spectrogram for instance) for best 
results when aligning the filters, and set the low frequency "knee" of 
the passband at 300 Hz.  If possible use a broadband noise generator at 
the antenna connection, or you can often use "dead band noise" (no 
signals within the bandpass).


73,
Don W3FPR

On 11/5/2022 6:41 PM, Chris wrote:

Hello,

I have three K2's, and one of them has a very strange symptom.  It works
well in LSB and CW, but USB transmit audio seems very narrow.  Receive
audio in all modes works well with no issues.




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[Elecraft] Elecraft 80M SSB Net Announcement and NO time change

[Dave New]

A reminder that the Elecraft 80M SSB net meets weekly on Sunday  
evening, 9pm ET, on 3775 kHz (Advanced class portion of the band).


There is NO time change for this net, as there are many local nets on  
80M that do not change time when we go to/from daylight saving time,  
so we 'go with the flow' and keep the same time to avoid conflicts  
with other nets that share the same frequency before/after our net.


Hope to see you on 80M SSB this evening.

73,

-- Dave, N8SBE



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Re: [Elecraft] Elecraft contesting success

[Edward Mccann]

FB on the K4.

Any description of antenna farm attached to it?

Thanks.

Ed McCann
AG6CX

> On Nov 6, 2022, at 9:28 AM, Martin Sole  wrote:
> 
> Kudos to my very good friend Ken, K4ZW, for his stellar CQWW SSB 
> performance. Claimed score on 3830 of 6,280,820 points being #1 in the US and 
> #7 worldwide.
> 
> Whilst undoubtedly Ken's skill, honed over many years, and his rather 
> herculean (at least to me) 45 hours in the chair contributed to his success, 
> I think we can all agree that Ken's new Elecraft K4 played a major role not 
> to mention his K3 second radio.
> 
> Well done Ken and Elecraft.
> 
> Martin, HS0ZED
> 
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[Elecraft] Elecraft contesting success

[Martin Sole]

Kudos to my very good friend Ken, K4ZW, for his stellar CQWW SSB 
performance. Claimed score on 3830 of 6,280,820 points being #1 in the 
US and #7 worldwide.


Whilst undoubtedly Ken's skill, honed over many years, and his rather 
herculean (at least to me) 45 hours in the chair contributed to his 
success, I think we can all agree that Ken's new Elecraft K4 played a 
major role not to mention his K3 second radio.


Well done Ken and Elecraft.

Martin, HS0ZED

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