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

[Don Wilhelm]

Greg,

You must check RFC15 with n ohmmeter to determine if it is open or not.

Even if it is open, there will be 5 volts on both sides of RFC15.

73,
Don W3FPR

Greg Storms wrote:
> 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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