[Elecraft] K2 Noise Blanker Problem (Feature?)

[John Reiser]

Hi Harvey,

This is for you.  As I said before on this list, If you are having QRN, try 
turning on the KNB2.  On some types, particularly anoying kind kind that 
sounds like frying bacon, it works superbly.  But it doesn't work for all 
kinds of QRN in my experience.  No noise blanker does.

I always try changing the threshhohd as well.  Most of the time I notice no 
change, but sometimes it makes the difference between being able to copy a 
signal and not.  Of course, this assumes that your KNB2 is correctly built.

73,

John (W2GW)

----- Original Message ----- 
From: "Harvey Howell" <h.r.howell at worldnet.att.net>
To: "Bob Patten" <n4bp at bellsouth.net>; <support at elecraft.com>; "Elecraft 
Reflector" <elecraft at mailman.qth.net>; "Lyle Johnson" <kk7p at wavecable.com>
Sent: Sunday, April 09, 2006 8:51 PM
Subject: Re: [Elecraft] K2 Noise Blanker Problem (Feature?)


> Hi Bob. I tried switching the NB threshold and it has no effect on the NR 
> on my K2 s/n 5022.
>
> Harvey KN6VP
>
> ----- Original Message ----- 
> From: "Bob Patten" <n4bp at bellsouth.net>
> To: <support at elecraft.com>; "Elecraft Reflector" 
> <elecraft at mailman.qth.net>; "Lyle Johnson" <kk7p at wavecable.com>
> Sent: Sunday, April 09, 2006 10:44 AM
> Subject: [Elecraft] K2 Noise Blanker Problem (Feature?)
>
>
>> Hi Gary, I finally discovered what the NB was doing on every other 
>> threshhold change.  What I had perceived
>> as a drop in level was actually the DSP Noise Reduction being turned on 
>> and off.  Each time the NB is switched from
>> low to high threshhold, the DSP NR is either turned on or off depending 
>> on its present state.  I guess I should
>> consider this a bonus, since I only have to push one key (albeit twice) 
>> for NR instead of pushing Display
>> and Band+.   Now though, I'm wondering if this behaviour is unique to my 
>> K2 or if any with both Noise Blanker
>> and DSP installed exhibit the same?  You said you didn't hear any change 
>> on yours when cycling NB threshhold, but
>> did that K2 also have DSP installed?
>>
>> I'll post this to the list also - maybe someone else can verify whether 
>> this is unique to mine or common to all...
>>
>> -- 
>> 73,     Bob Patten, N4BP                Plantation, FL
>>
>> E-Mail: n4bp at arrl.net                   Website: http://www.qsl.net/n4bp
>> QRP ARCI #3412    SOC #1    ARS #799    SMIRK #6625          FISTS #7871
>>
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