K2 Noise

[DDWEBB]

I am hearing  low level random noise from my K2,
 I hear it from speaker or head phones as well and even when volume  and RF
controls are all CCW and the antenna is disconnected. I even hear it when  I am
in transmit mode. Any suggestions as to where to start looking. I hate the  
thought of removing the LM380n from the control board and finding I have a bad  
capacitor some where else.
Don...KA7L
 
 
 S/N 1175. REV B



**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.      
(http://food.aol.com/tyler-florence?video=4&?NCID=aolfod00030000000002)
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[Joe Vrabel]

I may have had a similar noise in my K-2 and had finally traced it to running Ham Radio Deluxe while using an external speaker.  If I shut down HRD the noise would go away, BUT with HRD on and using the internal speaker on the K-2 it was not there.  I traced it to computer noise getting into the speaker because of poor shielding of the external speaker leads.  Hope this helps: 73

DDWEBB wrote

I am hearing  low level random noise from my K2,
 I hear it from speaker or head phones as well and even when volume  and RF
controls are all CCW and the antenna is disconnected. I even hear it when  I am
in transmit mode. Any suggestions as to where to start looking. I hate the  
thought of removing the LM380n from the control board and finding I have a bad  
capacitor some where else.
Don...KA7L
 
 
 S/N 1175. REV B



**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.      
(http://food.aol.com/tyler-florence?video=4&?NCID=aolfod00030000000002)
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Elecraft web page: http://www.elecraft.com