[Elecraft] K3 High Level Digital noise

[Guy Olinger K2AV]

Usually this kind of thing is external to the K3, very often
mechanical. Often happens when something external is rearranged.
Remove *everything* connected to the K3 except the power and a dummy
load. Make sure the power voltage is normal. See what you get then. If
you still have noise, put an AC voltmeter across the DC power leads.
Come back with the results.

73, Guy K2AV

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While transmitting, my K3 developed a high level noise.  During SSB with the
mic level set at 25, there's 30 watts output power.  It sounds like digital
noise.  It stops when the mic level is set to zero.  There no microphone
connected and I just down loaded the latest firmware but that didn't help.
It happens on all bands and while transmitting into Bird 200 watt
attenuating load.  With an additional 20db of attenuation, and a total of 50
db, I checked the TX output on my spectrum analyzer. The spectrum is clean
at all TX levels.

Jack WA9FVP
Willco Electronics.