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K-3 Noise Reduction

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Ron Midwin

K-3 Noise Reduction

I have a K-3, S/N 1997 and was talking to a friend who also has a K-3 on the
air recently. He mentioned that he also recently purchased a Yaesu FT 5000
and noticed that the noise reduction on the FT 5000 seems to do a better job
of reducing the noise while still having good copy on the signal.

I told him that I don't use the NR often, and when I have tried it, I also
notice that even in the 1-1 setting the signal seems to lose some of its
clarity. So I'm hoping this is a cockpit issue on our end and that some of
you have your NR working well. Any comments would be appreciated. Other
than this, I still really love my K-3. I also am using the LP-Pan Adapter
and find it really makes my single receiver K-3 almost a Flex 1000 on the
receive, and I can listen to 2 signals via stereo headphones, one in each
ear.

73

Ron

AE6RH

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Bill K9YEQ

Re: K-3 Noise Reduction

Ron,

I don't have the 5k to compare, but have read and tried all the settings of
the K3 for AGC and NR/NB. I have found the wide variety of settings very
beneficial as I can set the K3 for the best performance in my situation. I
think that a recent post had at least 4 URL's you could visit to help you
understand the settings. The K3 does so much more than any radio I have
owned or own. I can foul up the NR or NB along with the AGC settings just
as well as any good appliance operator can, so some trial and error along
with a technical read on how these functions interact will turn any
appliance operator into a knowledgeable and successful user.

One more aside: I can get rid of most any noise with AGC settings, but
these will knock the signals down a bit. The electric fence across the
street with S5 signals can be eliminated! But not without some signal loss.
The underlying noise level is around s2-3 most days.

73,
Bill
K9YEQ

-----Original Message-----
I have a K-3, S/N 1997 and was talking to a friend who also has a K-3 on the
air recently. He mentioned that he also recently purchased a Yaesu FT 5000
and noticed that the noise reduction on the FT 5000 seems to do a better job
of reducing the noise while still having good copy on the signal.

I told him that I don't use the NR often, and when I have tried it, I also
notice that even in the 1-1 setting the signal seems to lose some of its
clarity. So I'm hoping this is a cockpit issue on our end and that some of
you have your NR working well. Any comments would be appreciated. Other
than this, I still really love my K-3. I also am using the LP-Pan Adapter
and find it really makes my single receiver K-3 almost a Flex 1000 on the
receive, and I can listen to 2 signals via stereo headphones, one in each
ear.

73

Ron

AE6RH

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Dick-2

Re: K-3 Noise Reduction

Bill,

Could you refer me to those urls? This is a most interesting thread
about NR and NB. To date my K3 is not as good as my 756 PRO III.
However, I am still new to the K3 and believe it to be cockpit error.
Other than that the k3 is a dynamite box. AGC, interesting will try
working with that.

73 Dick KO7N

On 5/16/2011 7:27 AM, Bill (K9YEQ) wrote:

> Ron,
>
> I don't have the 5k to compare, but have read and tried all the settings of
> the K3 for AGC and NR/NB. I have found the wide variety of settings very
> beneficial as I can set the K3 for the best performance in my situation. I
> think that a recent post had at least 4 URL's you could visit to help you
> understand the settings. The K3 does so much more than any radio I have
> owned or own. I can foul up the NR or NB along with the AGC settings just
> as well as any good appliance operator can, so some trial and error along
> with a technical read on how these functions interact will turn any
> appliance operator into a knowledgeable and successful user.
>
> One more aside: I can get rid of most any noise with AGC settings, but
> these will knock the signals down a bit. The electric fence across the
> street with S5 signals can be eliminated! But not without some signal loss.
> The underlying noise level is around s2-3 most days.
>
> 73,
> Bill
> K9YEQ
>
> -----Original Message-----
> I have a K-3, S/N 1997 and was talking to a friend who also has a K-3 on the
> air recently. He mentioned that he also recently purchased a Yaesu FT 5000
> and noticed that the noise reduction on the FT 5000 seems to do a better job
> of reducing the noise while still having good copy on the signal.
>
> I told him that I don't use the NR often, and when I have tried it, I also
> notice that even in the 1-1 setting the signal seems to lose some of its
> clarity. So I'm hoping this is a cockpit issue on our end and that some of
> you have your NR working well. Any comments would be appreciated. Other
> than this, I still really love my K-3. I also am using the LP-Pan Adapter
> and find it really makes my single receiver K-3 almost a Flex 1000 on the
> receive, and I can listen to 2 signals via stereo headphones, one in each
> ear.
>
> 73
>
> Ron
>
> AE6RH
>
>
>
> ______________________________________________________________
> Elecraft mailing list
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>
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>
>

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Dick-2

Re: K-3 Noise Reduction

In reply to this post by Ron Midwin

Alexander Sack

Re: K-3 Noise Reduction

In reply to this post by Dick-2

On Mon, May 16, 2011 at 11:43 AM, Dick <[hidden email]> wrote:
> Bill,
>
> Could you refer me to those urls? This is a most interesting thread
> about NR and NB. To date my K3 is not as good as my 756 PRO III.
> However, I am still new to the K3 and believe it to be cockpit error.
> Other than that the k3 is a dynamite box. AGC, interesting will try
> working with that.

http://www.cliftonlaboratories.com/elecraft_k3_agc_and_s-meter.htm

(Google is your friend, I typed "AGC K3")

AGC definitely helps to some extent as well as working with the
passband as needed for really noisy situations.

I think a lot of folks on this list use the default settings which are
ABSOLUTELY fine but in some instances sub-optimal. I know playing
with my AGC did help.

My biggest complaint with the NR feature on the K3 (If Eric/Wayne and
friends care about my 0.2 cents), is that so far, the various
different algorithms have not been that helpful. Though we have a lot
of choices with the DSP, I find most of them a complete waste at least
on sideband. I typically use F1-1 (default) or F2-1.

I do wish there was more of an explanation on the different NR
algorithms employed than what's in the manual (plays music for
Elecraft to chime in...) ,i.e. what are the differences with respect
to the DSP, a general guideline/recommendation on what to try during
certain situations....etc.

73

-aps
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N2TK

Re: K-3 Noise Reduction

I am in agreement with you about the NR. It has been one thing I have raised
the issue about for quite a while. I do like the NR on CW. I typically use
F1-1 or F1-2. Can't see turning it up any higher than that.

But on SSB, I only use F5-1. I wish there was something less than this so
that the background noise would diminish without coloring the audio. I like
the way the NR works on the Icom 7600 with the low settings.

It is not a major obstacle. More like "I wish it was better".

I like the rest of the rig, actually with both of my K3's.

73,
N2TK, Tony

Only a few more days till Dayton.

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Alexander Sack
Sent: Monday, May 16, 2011 3:45 PM
To: [hidden email]
Subject: Re: [Elecraft] K-3 Noise Reduction

On Mon, May 16, 2011 at 11:43 AM, Dick <[hidden email]> wrote:
> Bill,
>
> Could you refer me to those urls? This is a most interesting thread
> about NR and NB. To date my K3 is not as good as my 756 PRO III.
> However, I am still new to the K3 and believe it to be cockpit error.
> Other than that the k3 is a dynamite box. AGC, interesting will try
> working with that.

http://www.cliftonlaboratories.com/elecraft_k3_agc_and_s-meter.htm

(Google is your friend, I typed "AGC K3")

AGC definitely helps to some extent as well as working with the
passband as needed for really noisy situations.

I think a lot of folks on this list use the default settings which are
ABSOLUTELY fine but in some instances sub-optimal. I know playing
with my AGC did help.

My biggest complaint with the NR feature on the K3 (If Eric/Wayne and
friends care about my 0.2 cents), is that so far, the various
different algorithms have not been that helpful. Though we have a lot
of choices with the DSP, I find most of them a complete waste at least
on sideband. I typically use F1-1 (default) or F2-1.

I do wish there was more of an explanation on the different NR
algorithms employed than what's in the manual (plays music for
Elecraft to chime in...) ,i.e. what are the differences with respect
to the DSP, a general guideline/recommendation on what to try during
certain situations....etc.

73

-aps
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Ruben Navarro Huedo-2

Re: K-3 Noise Reduction

Yes, i think the same.
Best ussable NR for me is from last Icom HF radios.

Like Tony told: It is not a major obstable, but ... i wish it was better.

El 16/05/2011 22:16, N2TK, Tony escribió:

> I am in agreement with you about the NR. It has been one thing I have raised
> the issue about for quite a while. I do like the NR on CW. I typically use
> F1-1 or F1-2. Can't see turning it up any higher than that.
>
> But on SSB, I only use F5-1. I wish there was something less than this so
> that the background noise would diminish without coloring the audio. I like
> the way the NR works on the Icom 7600 with the low settings.
>
> It is not a major obstacle. More like "I wish it was better".
>
> I like the rest of the rig, actually with both of my K3's.
>
> 73,
> N2TK, Tony

--
Rubén Navarro Huedo - EA5BZ
http://www.palotes.com
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KK7P

Re: K-3 Noise Reduction

In reply to this post by Alexander Sack

The K3 NR algorithm is a trade-off between noise reduction and stability.

The wider the dynamic range of signals presented to it, the more
aggressive it must be, which in turn makes it less useful for applying
small amounts of noise reduction.

The NR pays some attention to the settings of AGC Slope and AGC
Threshold. The higher the Threshold, and the steeper the Slope, the
more aggressive NR must be at its lowest settings to prevent instability
(SCREECH!!!!). We have chosen to make the NR somewhat more aggressive
in all cases to prevent instability.

Thus, if you have AGC Threshold set low and the Slope set to flat, the
NR will be more usable on weaker signals.

In the end, NR is a filter, and like any filter it will affect what is
being passed through it. The weaker the signal, the more it appears
like noise and the harder it is to separate the two.

Finally, NR is part of a general field of psychoacoustics. What some
people like, others barely tolerate. Somewhat like tastes in music...

We are always looking at ways of doing this better, and went through a
very lengthy several months ago to improve NR. You can be sure that we
will revisit it when we review the status of the K3 firmware and operation.

73,

Lyle KK7P (your friendly K3 DSP guy)

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Eugene Balinski

Re: K-3 Noise Reduction

In reply to this post by Ruben Navarro Huedo-2

All,

For basic noise reduction operation, the ADSP-2 unit in
the venerable SGC SG-2020 is about the best DSP I have
heard. IMHO it sets the bar for all DSP NR units.

The NR has 2 levels. The first level is excellent for
electrical noise and QRN removal along with a great
auto-notch function to remove tones, all without fatiguing
digital artifacts.

The second level is a deeper version of the first and
can be used during strong signal high QRN/noise situations.

The NR chip and algorithm are now quite old in
electronics terms, but the technology is still valid and
offers a great launching point upon which to improve.

73,

Gene K1NR

On Mon, 16 May 2011 22:24:04 +0200
Ruben Navarro Huedo <[hidden email]> wrote:

> Yes, i think the same.
> Best ussable NR for me is from last Icom HF radios.
>
> Like Tony told: It is not a major obstable, but ... i
> wish it was better.
>
> El 16/05/2011 22:16, N2TK, Tony escribió:
> > I am in agreement with you about the NR. It has been
> one thing I have raised
> > the issue about for quite a while. I do like the NR on
> CW. I typically use
> > F1-1 or F1-2. Can't see turning it up any higher than
> that.
> >
> > But on SSB, I only use F5-1. I wish there was something
> less than this so
> > that the background noise would diminish without
> coloring the audio. I like
> > the way the NR works on the Icom 7600 with the low
> settings.
> >
> > It is not a major obstacle. More like "I wish it was
> better".
> >
> > I like the rest of the rig, actually with both of my
> K3's.
> >
> > 73,
> > N2TK, Tony
>
> --
> Rubén Navarro Huedo - EA5BZ
> http://www.palotes.com
>

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Arie Kleingeld PA3A-2

K3 NR in the Tropics

All,

During the 9L5MS DXpedition (about one month ago) we used my K3 on 160m.
Because of little available space we had no RX antennas, and we had to
listen on the vertical antenna. The usual tropical QRN was there, about
S8 - S9+15dB. The NB on my K3 is always on at a moderate setting doing
its job, so nothing new there. It works just fine but not for the
continuous tropical rumble..

Now comes the nice part. During the long nights on 160m I added the K3
NR. What a relief!! It reduced the effect of the QRN so much that I was
on for hours without getting tired. I donot think it helped the S/N
much, but it helped my ears and made operating a joy. We have received
several nice comments on our 160m operation about our 'good ears'.
(Probably from the people we worked hi).

73
Arie PA3A
(Mercy Ships Sierra Leone 2011 DXpedition - 9L5MS)
www.sierraleone2011.com

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Bill W4ZV

Re: K-3 Noise Reduction

In reply to this post by KK7P

KK7P wrote

In the end, NR is a filter, and like any filter it will affect what is
being passed through it. The weaker the signal, the more it appears
like noise and the harder it is to separate the two.

This is why some of us use a relatively wide DSP filter (4-500 Hz) when listening to ultra weak CW signals...so our brain's DSP can do a better job of separating the signal from noise. If you have an extremely narrow DSP filter (either set by WIDTH or NR), noise going through that filter can cause ringing which interferes with the signal. Some of you may have noticed the same effect with APF.

I never use NR because it's essentially doing doing the same thing as reducing WIDTH. However I do find APF can help in some cases (again with a fairly wide WIDTH setting) but it appears to be more effective in impulsive noise (i.e. lightning induced) rather than white noise (i.e. galactic noise). That's the opposite of what I expected but that's how it works for me.

As Lyle said:

> Finally, NR is part of a general field of psychoacoustics. What some
people like, others barely tolerate. Somewhat like tastes in music...

Each must experiment to see what works best for your own brain/ears.

73, Bill

Johnny Siu

K-3 Noise Reduction

Hello Bill,

I trust Elecraft engineers have already listened to some elecrafters' comments as compared with the NR in Icom radios. Elecraft will find ways to improve the NR by regular firmware updates.

I have no further to add but do suggest elecrafters try the NR in the latest IC9100 if you are going to Dayton. You will notice it is a further improvement in NR in IC9100 when compared with their big radios especially in SSB.

I am going to wear my callsign / name badge in Dayton. I trust there will not be too many Asian faces there and you can easily identify me. Of course, I will definitely visit the Elecraft booth.

See you later!

TNX & 73,

Johnny VR2XMC

從︰ Bill W4ZV <[hidden email]>
收件人︰ [hidden email]
傳送日期︰ 2011年05月17日 (週二) 8:06 PM
主題︰ Re: [Elecraft] K-3 Noise Reduction

KK7P wrote:
>
> In the end, NR is a filter, and like any filter it will affect what is
> being passed through it. The weaker the signal, the more it appears
> like noise and the harder it is to separate the two.
>

This is why some of us use a relatively wide DSP filter (4-500 Hz) when
listening to ultra weak CW signals...so our brain's DSP can do a better job
of separating the signal from noise. If you have an extremely narrow DSP
filter (either set by WIDTH or NR), noise going through that filter can
cause ringing which interferes with the signal. Some of you may have
noticed the same effect with APF.

I never use NR because it's essentially doing doing the same thing as
reducing WIDTH. However I do find APF can help in some cases (again with a
fairly wide WIDTH setting) but it appears to be more effective in impulsive
noise (i.e. lightning induced) rather than white noise (i.e. galactic
noise). That's the opposite of what I expected but that's how it works for
me.

As Lyle said:

> Finally, NR is part of a general field of psychoacoustics. What some
people like, others barely tolerate. Somewhat like tastes in music...

Each must experiment to see what works best for your own brain/ears.

73, Bill
______________________________________________________________
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Johnny Siu

K-3 Noise Reduction

In reply to this post by Bill W4ZV

Jim-2

Re: K-3 Noise Reduction

Johnny, look forward to seeing you at Dayton at either the Elecraft booth or with Adam.

I also find the NR on my K3 not to be one of the better ones but it is useable for me at only the very least aggressive setting. Hey! With the Icom you don't want to go past 10:30 or 11:00 o'clock because it becomes too aggressive.

73 de KE4WY Jim

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of Johnny Siu
Sent: Tuesday, May 17, 2011 10:01 AM
To: Bill W4ZV; [hidden email]
Subject: [Elecraft] K-3 Noise Reduction

Hello Bill,

I trust Elecraft engineers have already listened to some elecrafters' comments as compared with the NR in Icom radios. Elecraft will find ways to improve the NR by regular firmware updates.

I have no further to add but do suggest elecrafters try the NR in the latest IC9100 if you are going to Dayton. You will notice it is a further improvement in NR in IC9100 when compared with their big radios especially in SSB.

I am going to wear my callsign / name badge in Dayton. I trust there will not be too many Asian faces there and you can easily identify me. Of course, I will definitely visit the Elecraft booth.

See you later!

TNX & 73,

Johnny VR2XMC

從︰ Bill W4ZV <[hidden email]>
收件人︰ [hidden email]
傳送日期︰ 2011年05月17日 (週二) 8:06 PM
主題︰ Re: [Elecraft] K-3 Noise Reduction

KK7P wrote:
>
> In the end, NR is a filter, and like any filter it will affect what is
> being passed through it. The weaker the signal, the more it appears
> like noise and the harder it is to separate the two.
>

This is why some of us use a relatively wide DSP filter (4-500 Hz) when listening to ultra weak CW signals...so our brain's DSP can do a better job of separating the signal from noise. If you have an extremely narrow DSP filter (either set by WIDTH or NR), noise going through that filter can cause ringing which interferes with the signal. Some of you may have noticed the same effect with APF.

I never use NR because it's essentially doing doing the same thing as reducing WIDTH. However I do find APF can help in some cases (again with a fairly wide WIDTH setting) but it appears to be more effective in impulsive noise (i.e. lightning induced) rather than white noise (i.e. galactic noise). That's the opposite of what I expected but that's how it works for me.

As Lyle said:

> Finally, NR is part of a general field of psychoacoustics. What some
people like, others barely tolerate. Somewhat like tastes in music...

Each must experiment to see what works best for your own brain/ears.

73, Bill

__________ Information from ESET Smart Security, version of virus signature database 6129 (20110517) __________

The message was checked by ESET Smart Security.

http://www.eset.com

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Johnny Siu

K-3 Noise Reduction

Good, Jim. I trust you know how to find me and Adam.

TNX & 73,

Johnny VR2XMC

從︰ Jim <[hidden email]>
收件人︰ [hidden email]
傳送日期︰ 2011年05月17日 (週二) 10:16 PM
主題︰ Re: [Elecraft] K-3 Noise Reduction

Johnny, look forward to seeing you at Dayton at either the Elecraft booth or with Adam.

I also find the NR on my K3 not to be one of the better ones but it is useable for me at only the very least aggressive setting. Hey! With the Icom you don't want to go past 10:30 or 11:00 o'clock because it becomes too aggressive.

73 de KE4WY Jim

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of Johnny Siu
Sent: Tuesday, May 17, 2011 10:01 AM
To: Bill W4ZV; [hidden email]
Subject: [Elecraft] K-3 Noise Reduction

Hello Bill,

I trust Elecraft engineers have already listened to some elecrafters' comments as compared with the NR in Icom radios. Elecraft will find ways to improve the NR by regular firmware updates.

I have no further to add but do suggest elecrafters try the NR in the latest IC9100 if you are going to Dayton. You will notice it is a further improvement in NR in IC9100 when compared with their big radios especially in SSB.

I am going to wear my callsign / name badge in Dayton. I trust there will not be too many Asian faces there and you can easily identify me. Of course, I will definitely visit the Elecraft booth.

See you later!

TNX & 73,

Johnny VR2XMC
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Edward R Cole

Re: K-3 Noise Reduction

In reply to this post by Ron Midwin

So far, I have not used the K3+2m transverter on weak-eme CW, but
when I did quite a bit of eme-CW several years before the advent of
digital-eme I found the use of NR and DSP narrow BW filters (100-200
Hz) necessary to copy CW. This was using my FT-847 which has a more
limited DSP menu than the K3.

Running the NR also helped weak 2m SSB somewhat, but there
occasionally was a "muddying effect" to the audio characteristics
that sometimes was counter-productive to good hearing. I have used
the K3 NR on hard to copy SSB on HF and a little bit on 2m-SSB and
did some A/B comparisons with my FT-847 NR and can say that even the
default settings on the K3 were decidedly clearer to listen to. In
my opinion this helps my ability to copy and consider that to be an
apparent improvement in SNR (though may be more the psychoacoustical
effect?). Whatever, it helps my reception. NR on HF has a nice
general quieting effect on HF even with strong signals.

When I get my 2m-eme system back in the air after some maintenance
and upgrades, it will be quite interesting to play with the NR and
AGC settings to find best settings for weak eme-CW and weak
VHF-SSB. I have already used the APF on some uncopyable CW and it
brings it nicely up to a point of being able to copy (I expect this
to be super for eme-CW).

On SSB, NR does seem to be more effective with some voices than
others, so it is not always helpful. Same as using narrow BW often
does not help voice comprehension.

The customizing ability for the features of the K3 make it much more
effective, once one determines those settings.

73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kW?, 144-1.4kw, 432-100w, 1296-testing*, 3400-?
DUBUS Magazine USA Rep [hidden email]
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aandrei

Re: K-3 Noise Reduction

In reply to this post by Ron Midwin

For NR I always use BHI (Gap Hear it) or Lingua (http://www.ssbusa.com/LINGUA.html) products. They seem to be very similar technology, with the audio implemented a bit differently.
If you use headphones for very weak signals in large amounts of noise, I recommend the 10W BHI speaker, it has a newer, quieter audio circuit, or the Lingua. It is impressive the amount of noise these devices eliminate without loosing almost any signal strength, literally things you would not hear otherwise in a high noise floor come out crystal clear. They pretty much eliminate listening fatigue in noisy environments..
Been using them for three years now in the middle of metropolitan London (England) with great success.
The only time I don't use them is on rare, short intervals when 40m is very quiet and local propagation excellent.
They are AF-type NR using some adaptive neural net technology, and IMHO much better than the K3's or any other RF NR that I have seen (FT5000, ICOM and TS top of the line models) - for SSB Voice that is.
Not for CW.

Cheers,

Adi

On 16/05/2011 15:04, Ron Midwin wrote:

> I have a K-3, S/N 1997 and was talking to a friend who also has a K-3 on the
> air recently. He mentioned that he also recently purchased a Yaesu FT 5000
> and noticed that the noise reduction on the FT 5000 seems to do a better job
> of reducing the noise while still having good copy on the signal.
>
>
>
> I told him that I don't use the NR often, and when I have tried it, I also
> notice that even in the 1-1 setting the signal seems to lose some of its
> clarity. So I'm hoping this is a cockpit issue on our end and that some of
> you have your NR working well. Any comments would be appreciated. Other
> than this, I still really love my K-3. I also am using the LP-Pan Adapter
> and find it really makes my single receiver K-3 almost a Flex 1000 on the
> receive, and I can listen to 2 signals via stereo headphones, one in each
> ear.
>
>
>
> 73
>
>
>
> Ron
>
> AE6RH
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

oe9fwv

Re: K-3 Noise Reduction

In reply to this post by KK7P

Lyle Johnson schrieb am 16 May 2011 um 17:57:

> We are always looking at ways of doing this better, and went through a very
> lengthy several months ago to improve NR. You can be sure that we will
> revisit it when we review the status of the K3 firmware and operation.

the best NR (for my taste) I have encountered is from OM Ing. Michels.

Examples:
http://www.ing-michels.de/audio_demonstrations.html

73! de Werner OE9FWV

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Grant Youngman

Re: K-3 Noise Reduction

In reply to this post by aandrei

20 dB for both per spec. I suspect they're both LMS, but haven't tried the Lingua. I do like the Hear It, even if it does have that watery LMS sound. But it isn't the ultimate solution either. And as you say, it's worthless on CW. Do I believe the other radio's NB are so much better? Nah. Not in a heartbeat.

It's hard to forget the vituperative NR discussions on the TT list back when I had Orions I/II. Some loved it on those radios, some thought it was less than a pile of dung.

None of these things work miracles, which is what some expect. Nothing matters but (S+N)/N with and without, and I have yet to see anything definitive or believable except personal opine on how "nice" it sounds. Doesn't matter! Can you detect a weak signal in the presence of noise better? Is S/N really better? Measured? Anecdotal? Imagined?

A vendor can make it sound great and no contribute much.

Sent from my iPhone

On May 17, 2011, at 4:36 PM, Adi Andrei <[hidden email]> wrote:

> For NR I always use BHI (Gap Hear it) or Lingua (http://www.ssbusa.com/LINGUA.html) products. They seem to be very similar technology, with the audio implemented a bit differently.
> If you use headphones for very weak signals in large amounts of noise, I recommend the 10W BHI speaker, it has a newer, quieter audio circuit, or the Lingua. It is impressive the amount of noise these devices eliminate
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KD8NNU

Re: K-3 Noise Reduction

In reply to this post by Ron Midwin

I use the BHI in my mobile rig and could not live without it. Audio NR
only effects the spectrum going to the speaker and it really can reduce
the hiss.

I am going to look at Dayton to see if they have a stereo version, if
they do I will be bringing it home with me.

Don
KD8NNU

On Tue, May 17, 2011 at 5:36 PM, Adi Andrei wrote:

> For NR I always use BHI (Gap Hear it) or Lingua
> (http://www.ssbusa.com/LINGUA.html) products. They seem to be very
> similar technology, with the audio implemented a bit differently.
> If you use headphones for very weak signals in large amounts of noise,
> I recommend the 10W BHI speaker, it has a newer, quieter audio
> circuit, or the Lingua. It is impressive the amount of noise these
> devices eliminate without loosing almost any signal strength,
> literally things you would not hear otherwise in a high noise floor
> come out crystal clear. They pretty much eliminate listening fatigue
> in noisy environments..
> Been using them for three years now in the middle of metropolitan
> London (England) with great success.
> The only time I don't use them is on rare, short intervals when 40m is
> very quiet and local propagation excellent.
> They are AF-type NR using some adaptive neural net technology, and
> IMHO much better than the K3's or any other RF NR that I have seen
> (FT5000, ICOM and TS top of the line models) - for SSB Voice that is.
> Not for CW.
>
> Cheers,
>
> Adi
>
> On 16/05/2011 15:04, Ron Midwin wrote:
>> I have a K-3, S/N 1997 and was talking to a friend who also has a K-3
>> on the
>> air recently. He mentioned that he also recently purchased a Yaesu
>> FT 5000
>> and noticed that the noise reduction on the FT 5000 seems to do a
>> better job
>> of reducing the noise while still having good copy on the signal.
>>
>>
>>
>> I told him that I don't use the NR often, and when I have tried it, I
>> also
>> notice that even in the 1-1 setting the signal seems to lose some of
>> its
>> clarity. So I'm hoping this is a cockpit issue on our end and that
>> some of
>> you have your NR working well. Any comments would be appreciated.
>> Other
>> than this, I still really love my K-3. I also am using the LP-Pan
>> Adapter
>> and find it really makes my single receiver K-3 almost a Flex 1000 on
>> the
>> receive, and I can listen to 2 signals via stereo headphones, one in
>> each
>> ear.
>>
>>
>>
>> 73
>>
>>
>>
>> Ron
>>
>> AE6RH
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html