I applaud the persistence it must have taken you to come up with that
procedure, but it's actually kind of amusing to think about repeatedly
doing all of that during a contest.
73,
Dave AB7E
On 12/15/2021 9:52 AM, Bob McGraw wrote:
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 12/15/2021 9:46 AM, elecraft-requ...@mailman.qth.net wrote:
Message: 15
Date: Wed, 15 Dec 2021 09:36:26 -0500
From: Pete Smith N4ZR<pete.n...@gmail.com>
To: Elecraft List<elecraft@mailman.qth.net>
Subject: [Elecraft] K3 Noise Reduction
Message-ID:<dd5a2872-890f-feec-73ab-83a47b0d1...@gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Last weekend during the 10 meter contest I was experiencing very loud
line-noise-like interference when my antenna was pointing south.? I
tried both my K3's Noise Reduction and Noise Blanker functions, and was
unable to find any setting that gave useful relief.? With the noise
blanker, in particular, I noticed that when it was on, not only was the
buzz still very strong, but it seemed as if all CW signals on the band
were being hum-modulated.? As soon as I turned off the noise blanker,
the CW signals cleaned up.? Is there something wrong with my radio, or
an adjustment issue, or is this interference simply too strong??
Obviously, I'll be trying to track it down, but it's not there all the
time, so that could be tough.
-- 73, Pete N4ZR Check out the new Reverse Beacon Network web server
at <http://beta.reversebeacon.net>. For spots, please use your
favorite "retail" DX cluster. ------------------------------ Message:
16 Date: Wed, 15 Dec 2021 06:55:25 -0800 From: Dave <d...@nk7z.net>
To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Noise
Reduction Message-ID: <cfdb7170-cefb-9ef9-3b30-52c0bbac7...@nk7z.net>
Content-Type: text/plain; charset=utf-8; format=flowed I have that
same issue... I have some very dirty grow lights about two blocks
from me. They are dirty as they come... Splattering across 80-20
meters. The K3 has never been able to adequately clean up the crud
from them. In defense of the NB/NR on the K3, the signals are on the
order of S7 to S9, so my expectations may be too high for the K3. I
just hope the K4 NB/NR work better in my environment. 73, and thanks,
Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL
Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical
Resources ------------------------------
Message: 17
Date: Wed, 15 Dec 2021 08:05:59 -0700
From: David Hachadorian<k6ll.d...@gmail.com>
To: Pete Smith N4ZR<pete.n...@gmail.com>, Reflector Elecraft
<elecraft@mailman.qth.net>
Subject: Re: [Elecraft] K3 Noise Reduction
Message-ID:<d8b87093-eab7-ebf8-168b-175fae9fc...@gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
For 12 years I've tried to get any enhancement of s/n from the K3 IF/RF
NB and NR.? I haven't seen one case where there is any improvement under
contest conditions.? When the s/n just starts to improve, the desired
signal is modulated and degraded by nearby signals to the point where
reception is better with NB/NR turned off.? As far as I can see, both of
these features are useless on the K3 under contest conditions.
Dave Hachadorian, K6LL
Yuma, AZ
______________________________________________________________
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
Message delivered to ab7e...@gmail.com
______________________________________________________________
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
Message delivered to arch...@mail-archive.com
