[Elecraft] K3S Audio buzz on transmit, especially AM

[Jim Brown]

That makes sense too. The transformers are unshielded, so are sitting 
ducks for strong nearby magnetic fields.  K6XX ran into this early on 
running RTTY from a big amp PSU very close to a K3. The coupling was so 
strong that it went into regeneration!

73, Jim K9YC

On 4/26/2019 3:16 PM, donovanf at starpower.net wrote:
> I had this same problem years ago before purchasing my first K3.
> It turned out to magnetic field coupling between my HyGain
> T2X control box and an audio transformer in the transceiver.