[Elecraft] Is K3/0 Audio pass through or processed in K3/0?

[John K3TN]

John - I bought a K3/Mini last year and tried connected mic/headset to the
front panel 8 pin circular connector and the front panel headphone jack. I
had hum on xmit audio and very low receive audio.

I sent it back to Elecraft, they sent it back to me saying it was working -
to eliminate digital noise getting on the audio, later K3/Minis have a big
honking low pass filter in the audio chain between the rear panel connector
and the front panel connectors - that introduces a lot of loss. Their
recommended solution was to turn up the audio level in the RRC, but I'm
never in favor of amplifying then attenuating. This also would not solve the
TX hum/distortion, which the Elecraft tech didn't hear.

So, I just connected mic/headset directly to the RRC. Makes the cabling ugly
but the audio is FB now.

If you have an older Mini (I don't know the serial number cutoff) you might
have the noisy audio board. If you have a later Mini, you have the
attenuating/hummy audio board. Either way, I think cabling to the RRC
directly is a work around.

I quickly regretted buying the Mini, should have went with a bare bones
K3/10 - I don't really need the KX3 like form factor, have never actually
taken it on the road.

73 John K3TN




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