[Elecraft] K3 3051 audio buzz in chassis on SSB

[paulb]

Hi folks

K3 going perfectly fine here.
Just curious about an odd audio buzz
in the rear of the chassis under heavy
SSB modulation. It sounds like
transformer or frame slightly loose,
nothing appears loose or un-done.
Noticed when using the M1 audio 
record - playback, so normally don't 
hear it when using the mic.
Wonder if there is any particular area to
check ?

Antenna tuner is bypass; 
Low vswr coax to antenna.


cheers 

paul b

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