I am looking for the Elecraft K1 Noise Blanker KNB1.
Does anyone have this for sale?
Ken
N4SO
Elecraft K1 number 260
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On 2/22/2021 1:14 PM, Wayne Burdick wrote:
This recording hows how the new K4 noise blanker algorithm can reveal a signal
buried under loud noise.
Hi Wayne,
Have your beta testers (or other users accumulated any experience
blanking with any of K1JT's modes? I've got a couple of solar
Thanks, Wayne. The effectiveness of the K4 NB will be a major factor for
me.
FWIW, I have found the K3 NB to be vital in my locality and have
depended on it a lot (for hundreds of CW QSOs in the recent SKCC event),
its major fault being key "clicks" from adjacent CW signals leaking
through
A brief K4 audio sample can be downloaded using the link at the end of this
email.
This recording hows how the new K4 noise blanker algorithm can reveal a signal
buried under loud noise. It also highlights the effectiveness of the
audio-peaking filter (APF) when listening to a very weak CW
1. It really helps if you put the particular Elecraft product you're
writing about in the subject line. From reading way down, it "appears"
it's a K3.
2. We moved last year from a rural location [38 years] and I have no
electric fences around us now. For the 38 years on "The Farm," I was
You need to spend some quality book time and walk away from the radio
until you understand how it works.
Read and *understand* the *whole* manual once through before laying
another finger on the radio.
I would suggest the KE7X books as well as the manual(s).
You first need to find out what
So it seems no matter which IF NB setting I have the rig on, the NB will
invariably start to flash once I start transmitting. Maybe I don't
understand what I am doing (quite possible), so this is what I am doing.
See if this sounds correct.
I hear my neighbours electric fence
Sub 100 serial number K3
CW mode, 20m, low SWR.
Mostly using the 500Hz filter.
I don't know the radio at all. . . .but
I press NB, twizzle with VFO A and VFO B and get things set to where I think
they should
be to dampen my neighbours electric fence noise, but after a couple of
I 2nd that!
Keith
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Any idea when the Noise blanker will be implemented in the P3SVGA option? For
those of us with much noise the Noise Blanker in the P3 was a very nice
feature. I would really like to see it in my monitor when I use SVGA on
digital modes. Thanks and 73, Steve W0SZ
I made an attempt to plot the noise blanker performance and log the results
in an Excel spread sheet. I found that the test was in valid so I used a
different approach.
The test involves using a function generator that's built into my Agilent
DSOX3024. The generator is set for pulse mode with a
: wa9fvp
Date: 09/30/11 13:42:27
To: elecraft@mailman.qth.net
Subject: [Elecraft] Noise blanker test.
I made an attempt to plot the noise blanker performance and log the results
In an Excel spread sheet. I found that the test was in valid so I used a
Different approach.
The test involves
Hi, Jack,
The test involves using a function generator that's built into my
Agilent DSOX3024.
Ah, excellent choice. :^)
The generator is set for pulse mode with a 200mv P-P pulse
repeating 15.5 every 15ms.
I don't know what this means.
I determined that without the DSP or the I.F.
- Original Message -
From: David g0aixda...@aol.com
To: Elecraft@mailman.qth.net
Sent: Saturday, December 04, 2010 3:03 PM
Subject: [Elecraft] Noise Blanker Problems
Using the latest Beta Firmware I notice distortion on the audio when using
the noise blanker even on low settings
Not here Geoff, but I can't really tell. I assume there will be distortion
any time one goes whacking great holes in the spectrum of a signal to
blank noise pulses, and that will vary widely based on the strength of the
signal, presence of nearby signals and many other factors.
IIRC the exact
Yes Geoff, 4.22 appears effect the DSP NB more here with me also.
I rarely use it but in the last few days I have been trying it out and I am
noticing a lot more artifacts than before.
73's
Gary
On Sun, Dec 12, 2010 at 5:29 AM, Ron D'Eau Claire r...@cobi.biz wrote:
Not here Geoff, but I can't
Using the latest Beta Firmware I notice distortion on the audio when using the
noise blanker even on low settings. This applies whether dsp or if or both are
used. On reverting to Firmware 4.14 no such distortion occurs. Anyone else
have similar problems?
Dave G0AIX
* On 2010 04 Dec 09:05 -0600, David wrote:
Using the latest Beta Firmware I notice distortion on the audio when using
the noise blanker even on low settings. This applies whether dsp or if or
both are used. On reverting to Firmware 4.14 no such distortion occurs.
Anyone else have similar
The mechanisms of noise reduction nearly all result in artifacts of
some sort, which a given individual would describe as distortion
Removing anything unpleasant from the RF off the antenna while
surfacing a perfectly formed SSB audio which was formerly buried in
the unpleasantness and totally
I don't think I've ever had a rig that didn't cause SOME noticeable distortion
when used with SSB, but then 88% of my lifetime QSO's have been in CW Mode.
Using the lowest settings possible is a good way to reduce the distortion, but
it won't completely go away, since it works by chopping out the
what I have done is put a bandpass filter in line with the K3 antenna..the
one I had that worked best was one made by Gold Line for CB'ers, its nothing
more than a pi network, cap/coil/cap and its tuneable from 13 to 73 megs,
it worked better than the one made by ICE...
now I can set IF NOR-7
Hi all is there any way to keep the noise blanker (NB) on?
I have a K3 need to run it here perminantly due to local QRN from electric
fencing power line noise. Every time I change band it switches off.
Thanks
Andy
K3/100 (1701)
__
Hi Andy,
Try CONFIG menu NB save (see manual)
73!
Paul
PD0PSB
Andy-12 wrote:
Hi all is there any way to keep the noise blanker (NB) on?
I have a K3 need to run it here perminantly due to local QRN from
electric fencing power line noise. Every time I change band it switches
off.
I haven't been able to find noise blanker or noise reduction settings that are
much help.
I guess I probably have the wrong kind of noise. But is there a way I can
verify that things are working
as intended?
73
Jon LA4RT, Trondheim, Norway
Hi,
Just for the record, my standard setting is:
DSP t2-5
IF MED3
This is really effective for my power line noise. There are cases where the
noise starts to come back when there are strong (SSB) signals in the
passband but normally it remains blanked even then.
Knut - AB2TC
Petr
The noise blanker in the K3 is truly astounding. I find that to be really
effective on power line noise, I have to use the DSP portion of it. The IF
blanker alone will not do it. Unfortunately the DSP blanker distorts really
strong signals (say S9+10 and above). So if I listen to a group with
I have a question, and probably I missed something already
posted that would explain it. I plead guilty to not reading
all the posts as carefully as I probably should.
Anyway, this morning I found myself again dealing with the
Chinese radar on 40 meter CW. This thing comes and goes.
It
I lost some of today helping a club member with
an antenna but I'm not sure it was any great loss.
K2 QRP effort netted 35 QSOs for the whole contest
with only 4 mults.
There was one noteworthy thing from this effort.
For the first time while I was using my K2 there
was this irritating noise
Fred, did you remember or remove jumper W5 when you installed your noise
blanker? W5 is near Q22, the transistor with the heat sink on it. If you
forgot, the noise blanker is permanently bypassed.
A great test is a cheap lamp dimmer: the kind that makes a wall of noise on
80 meters when it's
Happy New Year Everybody!
Hey, this noise blanker thingy really works. The kids (college students)
living in the apartment just under mine got a neon sign for Christmas
BAR IS OPEN that flashes on and off every now and then. This produces a
raspy buzz which raises heck with the K2. Expecting no
K1 fans:
I finally bought a NB for the K1.
What a difference! Now I cannot hear them lights turning on or off
in the house!
Of course, I don't know which room my family is using anymore
either. (heh heh)
Ron, wb1hga
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on a
good radio for the improvement offered by the noise blanker?
Jimmy Walker
WA4ILO
Macon, GA
- Original Message -
From: ron [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Wednesday, September 27, 2006 5:50 PM
Subject: Re: [Elecraft] Noise Blanker
Hello all;
I push on a CW
NB removes man-made noise, NOT atmospheric noise.
Filters DO NOT remove man made noise. Nor do they remove
atmospheric noise. As I wrote, they give the appearance the noise is
gone, when turned on to narrow the bandwith. That's why you turn up
the volume a bit to compensate.
The filter's
I is my experience that the K2 Noise Blanker is quite effective on
certain types of impulse noise, while of little help on others, i.e.,
it is quite dependent on the characteristics of the noise. For
atmospheric noise, the noise reduction function of the KDSP2 works
better than anything
In a message dated 10/1/06 6:58:53 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Ignition noise from large trucks??? All of the ones I've seen are diesel -
no spark ignition at all!
Many of not most auto and truck diesel engines made in recent years use
electronic injection
In a message dated 10/2/06 10:45:35 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Yep, that's why I also wrote in the message you quoted from:
Such trucks often make a lot of hash from various electric motors, etc. -
just the sort of thing the NB can't touch.
Agreed!
My only real
Jim wrote:
My only real point was that the electronic injectors can make noise similar
to an ignition system.
OTOH, a diesel like this one:
http://people.bath.ac.uk/ccsshb/12cyl/
--
I didn't realize that. Thanks!
Wow! That's an ENGINE! It reminds me of the time
In my K2 # 5422 - I built two (2) NB kits, with no
luck in either doing much with noise. For sure
it did nothing on ignition/truck noise (3 cement
trucks outside our doors). And it did nothing
to reduce or change what I call repetitive
popcorn white noise signals on bands.
Hooked up to a wet
?
Ron AC7AC
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Fred (FL)
Sent: Sunday, October 01, 2006 2:28 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Noise Blanker
In my K2 # 5422 - I built two (2) NB kits, with no
luck in either doing much
VK3HE commented:
I have compared it to several other radios. One radio in particular the
TS830S has one of the most amazing all round noise blankers. All the
noise the Elecraft noise blanker struggles on the TS830S noise blanker
will handle on the low threshold setting. The same results can
It is designed to filter out man-made noise like from cars,
electrical devices in your home, malfunction street lights, etc.
I would not count on them to remove anything else.
Ron, wb1hga
VR2BrettGraham wrote:
NBs do not work on some noises all cause the
receiver to wilt from IMDs.
They
VR2BrettGraham wrote:
Strange, I also find other radios' NBs to work fine
on a wide range of noises will do so without
adding much of anything untoward.
All noise blankers that I've used cause some degradation of the
receiver's dynamic range performance. This means that in a strong
Vic, K2VCO wrote:
All noise blankers that I've used cause some degradation of the receiver's
dynamic range performance. This means that in a strong signal environment
(like in a contest) you will hear spurious responses when it is on. This is
of course a matter of degree, and I know there
Hello all;
I push on a CW filter and it does the same thing!
I also press attenuate with same results!
Unh? Noise blanker and/or filter does same thing?
Why?
Because filters and NB may appear to remove atmospheric noise, but
it's still there, because it's attenuated. (There's a little more to
it off i am shocked at what i am hearing! So
when it works it does work.
I have compared it to several other radios. One radio in particular the
TS830S has one of the most amazing all round noise blankers. All the
noise the Elecraft noise blanker struggles on the TS830S noise blanker
; KX1-35/3080
___
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of ZD
Sent: Tuesday, September 26, 2006 8:42 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Noise Blanker
My view is that the noise blanker needs
About the noise blanker: Mine is working fine on all bands except for a
particular noise on 40 m. It is killed completly by the NB on all other bands.
But it seems that the gain is not always (works some time) sufficient to
trigger it at 7,050 MHz. That noise is rising to full strength in about
: [Elecraft] Noise Blanker 60m option for K2
I just finished building and installing the KNB2 andK60XV option boards. As
usual with Elecraft it all went together FB and runs as advertised with no
problems. I do have two complaints, however.
1. The K60XV has no toroids! What kind of Elecraft kit
Since you've got the K60XV in there, how about building a transverter
or two? That's got to be worth a few evenings, plus there's some
toroids in them!
When I'm done my K2, if I'm still afflicted by the Elecraft bug, I'll
probably be looking at the 6M transverter.
73 de Stephanie
va3uxb
Craig Miller wrote:
1. The K60XV has no toroids! What kind of Elecraft kit is it with no
toroids to wind? Where's the fun in that?
The UnPCBs must have been a real letdown for you then :-)
You could always build the 160m option forget to solder some relay
legs. I found that was good for
I just finished building and installing the KNB2 andK60XV option boards. As
usual with Elecraft it all went together FB and runs as advertised with no
problems. I do have two complaints, however.
1. The K60XV has no toroids! What kind of Elecraft kit is it with no
toroids to wind? Where's the
Craig,
You are correct, the K160RX should take you only about 2 or 3 hours total
depending on how proficient you are at removing the heat sink from the PA
transistors.
(Tongue planted firmly in cheek)
You might want to make a major mechanical job out of attaching the BNC
connector the rear panel
Roland,
The tightness of the toroid windings will make no difference - the important
thing with toroids is that they have the correct number of turns, and not
much else matters - even the winding direction does not matter electrically.
The K2 noise blanker is more effective on impulse types of
elecraft@mailman.qth.net
Sent: Sunday, August 14, 2005 6:26 AM
Subject: RE: [Elecraft] noise blanker ineffectual
Roland,
The tightness of the toroid windings will make no difference - the
important
thing with toroids is that they have the correct number of turns, and not
much else matters
All the indicators say the noise blanker is functioning, I mean it says it's
on, but I really don't hear any difference at all. Can't tell a thing. It
certainly isn't as good as the ft920. So I'm wondering if maybe I wound the
toroids to tight. The first time I wound them the wrong
You might try DSP. DSP NR helps, but does not help as much as on some
other rigs.
At 06:54 AM 7/16/2005, Max Susan wrote:
I am located very near to the main railway line from London to
Birmingham. Four tracks and 25 Kv overhead wires. Very frequent trains
and you can imagine the noise.
To: Max Susan; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Noise Blanker
You might try DSP. DSP NR helps, but does not help as much as on some
other rigs.
At 06:54 AM 7/16/2005, Max Susan wrote:
I am located very near to the main railway line from London to
Birmingham. Four tracks
Plain Text Copy.
I have put the Noise Blanker Troubleshooting guide
that was developed by Gary Surrency and my experience
with the help of Don, W3FPR. Don was invaluable in
getting this thing fixed and was very good at sending
me emails with ideas about what the issues are. Don
has a
Thanks for all the very helpful replies regarding the noise blanker!
Mike AB3AP
Ron D'Eau Claire wrote on 04/30/05 11:37 ET:
Mike AB3AP wrote:
I've noticed the majority of K2s seem to be built with the NB. [...]
-
The noise blanker is designed to
Jim:
I found that nothing worked here until I RTFM and changed the NB
threshold from
High to Low. This whacked the horrendous track-light noise when my
family has
the audacity to use the family room when I am on 40 meters. ;-)
Have you changed that setting?
I really am going to fix these
Hisashi T Fujinaka wrote:
In my location, the K2 was unusable without the KNB2, so I'd get it in
step 1. But as they say, YMMV.
I've noticed the majority of K2s seem to be built with the NB. I don't
have it, and since I don't seem to be having any man-made noise problems
I've been wondering
Mike AB3AP wrote:
I've noticed the majority of K2s seem to be built with the NB. I don't have
it, and since I don't seem to be having any man-made noise problems I've
been wondering when where the NB is useful. Is it mainly for presumably
noisier urban and suburban areas? Without it would
in your
operating environment is intolerable.
Eric
KE6US
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Mike Markowski
Sent: Saturday, April 30, 2005 8:11 AM
To: Elecraft Main Group
Subject: Re: [Elecraft] Noise blanker [was: K2 battleplan?]
Hisashi T
In a message dated 30/04/05 16:12:07 GMT Daylight Time, [EMAIL PROTECTED]
writes:
I've noticed the majority of K2s seem to be built with the NB. I don't
have it, and since I don't seem to be having any man-made noise problems
I've been wondering when where the NB is useful. Is it
On April 30, 2005 4:31 pm, [EMAIL PROTECTED] wrote:
Only hope that eventually some future mod or redesign of this module may
be of benefit with the type of noise I suffer from.
Bob, G3VVT
K2 #4168
Have you considered the mods for the noise blanker:
: [Elecraft] Noise Blanker Wish List.
The Trio TS180S had this scheme of noise blanker as well.
73
Stewart G3RXQ
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Greetings Folks,
An Evasive noise blanker is on my wish list. This is the system where the
noise blanker receives noise from out of band and none of its circuits
(except for its input tap off and the IF Gate) are in the main signal
path. Best done when you can tune the noise blanker receiver a
The Trio TS180S had this scheme of noise blanker as well.
73
Stewart G3RXQ
On Fri, 11 Feb 2005 08:55:13 -, Geoffrey Mackenzie-Kennedy wrote:
Greetings Folks,
An Evasive noise blanker is on my wish list. This is the system where the
noise blanker receives noise from out of band and none
Geoff
That's the way the NB in my old Kenwood TS180 worked.
It has an 8 MHz 1st IF, and the NB pickoff is before the 8 MHz crystal
filter, as I recall. The NB is tunable with a front panel control to
allow you to move away from an interfering signal.
73, Bob N6WG
-- Original message
Hi,
I just finished another module for my K2, the Noise Blanker. I added a
few photos in my website, for those who wish to see what it looks like.
http://homepage.mac.com/jfmenard/PhotoAlbum30.html
73
===
Jean-François Ménard / VA2VYZ
[EMAIL
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