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

[Don Wilhelm]

Greg,

It could be any number of things from having an AC transformer located 
too close to the K2 (especially on the left side - did you re-arrange 
the operating position?) to a bad solder connection somewhere.

We need more detail to even get started.

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.

73,
Don W3FPR

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?
>