[Elecraft] K3 Distorted Sound while using AM

Matt Zilmer mzilmer at verizon.net
Sun Dec 6 10:25:55 EST 2009


If you're using the 2.8 or 2.1 filters for AM mode reception, it would
probably sound distorted.  The 2.8 works fine for listening to AM in
SSB mode though.

matt W6NIA
K3 #24

On Sat, 05 Dec 2009 21:50:28 -0800 (PST), you wrote:

>
>Hey Joe,
>
>Thanks for the fast reply!
>
>No,  I do not have the AGC Off, nor have I changed any of the "settings"
>within the AGC (Menus).  I should have stated that in my original post. 
>Anyway,  I am really stumped as what the problem is.  
>
>If you happen to have a K3 equipped as mine,  could try to listen to an AM
>station with the "Volume" turned up, to see if you are receiving the
>distortion?
>
>I should have been more specific,  the radio is totally loaded.  It does
>have the 8 Pole filters in both receivers.  From my recollection I have the
>following filters:  250 Data & CW,  2.1 for SSB, 2.8 for SSB, and 6 for AM,
>and 13 for FM.  I hope this makes it a litter clearer and not more
>confusing.
>
>Thanks Joe,
>
>Rick
>
>
>
>Thanks,
>
>Rick
>
>
>
>Joe Planisky wrote:
>> 
>> Hi Rick,
>> 
>> Do you perhaps have AGC turned off and the AF LIM set to a value of  
>> less than 30?  The distortion and eventual cutting out of audio at  
>> high levels you are describing sounds a lot like the intended AF  
>> limiter action.  If so, the solution is to either turn on AGC, or  
>> increase the AF LIM setting closer to 30.  I find an AF LIM setting of  
>> 28 allows as much dynamic range as I want while still protecting my  
>> tender ears from various pops and static crashes.
>> 
>> The AF limiter is intended to protect your ears and speakers from  
>> unexpectedly loud signals when AGC is turned off.  It will prevent the  
>> output from exceeding the preset value at the expense of distortion.
>> 
>> 
>> 73
>> --
>> Joe KB8AP
>> 
>> 
>> 
>> On Dec 5, 2009, at 8:50 PM, Richard Jones - KJ5QY wrote:
>> 
>>>
>>> Hello,
>>>
>>> I am having a problem when I go into AM, or AM sync.  Example:  I go  
>>> to an
>>> AM Shortwave station.  If I turn the AF gain past approximately 3/4 or
>>> farther the radio starts to "Stutter, Distort, and finally the audio
>>> disappears.  I cannot make out what is coming out from my speaker.   
>>> The
>>> audio is completely distorted or gone.  I noticed I could rotate the  
>>> Af gain
>>> (Counter Clockwise) and it would go back to less distortion.  I did  
>>> check
>>> the external speaker jack and also unplugged it only to find the same
>>> problem.
>> 
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> 
>> 


More information about the Elecraft mailing list