[Elecraft] K-2 Transmitted signal distorted (Hum)

[Greg Storms]

Thanks for all the replies!

Not a power supply problem.  Does exactly the same thing when on battery 
backup.  Nothing new in the operating position to create a problem.  
RFC15 is *NOT* open.  There is 5 volts on both sides of it.

Don Wilhelm wrote:
>
> One thing you may want to check is RFC15 on the bottom of the RF 
> Board.  Check it with an ohmmeter to be certain it is not open.  If 
> you try to do it by measuring the voltage on each side of the choke, 
> you will find 5 volts on both sides whether it is open or not.
>
>
>
> Greg Storms wrote:
>> I have just started experiencing a tremendous distortion on my 
>> transmitted signal (K-2).  It was first noticed by a SSB
>> contact.  He said my transmission was strong but nearly unreadable.  
>> I duplicated it at low and high power on a separate receiver.
>> It occurs on both SSB and CW.  This happened rather suddenly as I had 
>> contacts the previous day with no problems noted.
>>
>> Occurs when the KAT-100 is grounded or ungrounded and on different 
>> antennas.  Anyone else had this happen?  Suggestions
>> as to where to begin looking?
>>
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