[Elecraft] [Elecraft K3] Volume Level with NR

JAMES ROGERS w4atk at bellsouth.net
Mon Oct 4 20:01:49 EDT 2010 

Not throttled back here.

Jim, W4ATK

On Oct 4, 2010, at 6:20 PM, David Herring wrote:

> General question to those participating in this thread,  when you  
> engage NR, are you running RF gain maxed out, or are you adjusting  
> RF gain back to the point where it just affects the S-meter?
>
> Sadly I'm off the air for a few days so I can't test myself, but I'm  
> interested to know if throttling the RF gain has any bearing on the  
> drop in volume.
>
> 73,
>
> Dave, AH6TD
>
> Sent from my iPhone
>
> On Oct 4, 2010, at 12:47 PM, Gary Gregory <garyvk4fd at gmail.com> wrote:
>
>> Hmmm...this topic appears from time to time and in the early days I  
>> think it
>> was relevant. Since Lyle has has worked on the DSP and introduced  
>> F1-x  for
>> CW and 5-x up for SSB there has been a huge improvement.
>>
>> Perhaps the settings used by those experiencing a big drop in audio  
>> levels
>> are different to mine BUT I have just checked 7.055 listening to an
>> Indonesian station close to the noise floor.
>>
>> The result is I hear a lot of band noise and a soft and difficult to
>> understand SSB conversation, when I use NR (5-2) the noise drops
>> significantly and the voice is marginally softer but now  
>> understandable. and
>> a QSO would be easy to do providing the other station would be able  
>> to copy
>> me.
>>
>> I am sure that Lyle will revisit the Algorithm and see if indeed any
>> improvements can be made BUT for now I am quite satisfied with the NR
>> functionality.
>>
>> Having said this, we all experience different band conditions and  
>> what works
>> for one person may not work for all of us.
>>
>> My 2 cents worth...keep the change
>>
>> 73's
>> Gary
>>
>>
>>
>> On Tue, Oct 5, 2010 at 8:15 AM, WILLIS COOKE <wrcooke at yahoo.com>  
>> wrote:
>>
>>> That sure is not what I have observed.  My signals drop about 2 S  
>>> units if
>>> they
>>> are strong.  If they are near the noise level they disappear.  I  
>>> am running
>>> F
>>> 1-1.  It is worse if I run a higher NR level.
>>>
>>> Willis 'Cookie' Cooke
>>> K5EWJ
>>>
>>>
>>>
>>>
>>> ________________________________
>>> From: W4GRJ <w4grj at satterfield.org>
>>> To: Dale Wiese <dwiese42 at mac.com>; Elecraft Email <
>>> elecraft at mailman.qth.net>
>>> Sent: Mon, October 4, 2010 4:54:21 PM
>>> Subject: Re: [Elecraft] [Elecraft K3] Volume Level with NR
>>>
>>> Dale,
>>>
>>> Just for reference, my experience with the K3 NR is outstanding. I  
>>> cannot
>>> notice any reduced volume on the tuned signal. The NR on my K3  
>>> does a great
>>> job of whacking out the noise without effecting the signal level.
>>>
>>> You may need to do some checking of settings and calibration, I am  
>>> sure
>>> there are folks here that can help you.
>>>
>>> Jack
>>> W4GRJ
>>>
>>>
>>> -----Original Message-----
>>> From: elecraft-bounces at mailman.qth.net
>>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Dale Wiese
>>> Sent: Monday, October 04, 2010 2:31 PM
>>> To: Elecraft Email
>>> Subject: Re: [Elecraft] Volume Level with NR
>>>
>>> Wayne,
>>>
>>> I am going to disagree - I think its a real issue, and an area for  
>>> K3
>>> improvement.  While I have not been to Jim's shack to hear what he  
>>> is
>>> hearing, it  sounds like what I have always observed, at least for  
>>> SSB
>>> reception.  Engaging the NR significantly reduces the overall  
>>> audio level.
>>>
>>> When I engage the NR on my MkV or FT-847, the band noise drops  
>>> away, but
>>> the
>>> perceived volume of the monitored voice stays about the same.  It  
>>> is rare
>>> that I need to touch the volume control.  Yaesu NR is reasonably  
>>> effective
>>> for turning a marginal signal into something that can be copied, and
>>> turning
>>> a strong signal with high band noise into something more pleasant  
>>> to listen
>>> to.
>>>
>>> On the K3, engaging the NR in SSB drops both the noise and the  
>>> apparent
>>> voice level substantially, requiring that the volume control be  
>>> turned up
>>> [a
>>> lot]  to copy the voice.  But then the noise is also increased.
>>> Frequently it feels like the NR has done little to no good, but it  
>>> is hard
>>> to tell.  Perhaps the ratio between the band noise and the desired  
>>> signal
>>> is
>>> improved, but overall I would say its not.  Or not very much.
>>>
>>> The NR difference on SSB between the K3 and the Yaesu products I  
>>> have used
>>> is large, and the K3 loses.  It is the _only_ K3 feature I find  
>>> which is
>>> sub-par, and only for SSB - NR for CW seems much more effective.
>>>
>>> 73,
>>> Dale
>>> N9XD
>>>
>>>
>>> On Oct 4, 2010, at 9:13 AM, Wayne Burdick wrote:
>>>
>>>> Jim,
>>>>
>>>> Some drop in apparent volume level is typical with NR. Part of the
>>>> drop is due to the removal of noise. Part of it may be a
>>>> psychoacoustic effect (sorry, I'm not an expert on this).
>>>>
>>>> You might also try setting F5-1. Settings from F5-x to F8-x use a
>>>> different algorithm.
>>>>
>>>> 73,
>>>> Wayne
>>>> N6KR
>>>>
>>>>
>>>> On Oct 4, 2010, at 9:04 AM, Jim Harris wrote:
>>>>
>>>>>
>>>>> Hi,
>>>>>
>>>>> I've noticed recently that when I press NR the volume level drops
>>>>> what could be called a considerable amount.  I normally use NR
>>>>> setting of F-1-1 or -2.  More than that tends to almost mute the
>>>>> receiver.  I find that the volume control needs to be increased
>>>>> about 70 degrees or so to give the same loudness as before the NR
>>>>> was pressed with the above settings.  I have to manually change  
>>>>> the
>>>>> volume every time I engage or disengage the NR.  I realize that  
>>>>> most
>>>>> likely there should be some decrease in loudness but this seems to
>>>>> be excessive.
>>>>>
>>>>> Does anyone have any meaningful experience or recommendations they
>>>>> can pass along.
>>>>>
>>>>> Thank you.
>>>>>
>>>>>
>>>>> Take Pride in the USA!
>>>>>
>>>>> 73,  Jim, W0EM
>>>>>
>>>>>
>>>>>
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>>
>>
>>
>> -- 
>> Gary
>> VK4FD - Motorhome Mobile
>> http://www.qsl.net/vk4fd/
>> K3 #679
>> For everything else there's Mastercard!!!
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