"FWIW, standard Line Out is 1Vp-p at 600 ohms line impedance. matt"
I think you'll find standard, nominal "Line-In/Out" consumer levels to be
referenced to -10 dBV irrespective of Z, where 0dBV = 1 Vrms. This standard
started with the old IHF, merged into EIA, and then somewhere along the way
I believe AES became the recognized standard-setting organization in North
America. K9YC would know for sure.
-10 dBV is equivalent to 0.316 Vrms. If we assume a worst-case 10 dB
peak-to-average ratio (and probably a lot less depending on the K3's AGC
menu settings), then the maximum distortion-free signal voltage handling
required is 0 dBV or 1 Vrms or 2.83 Vp-p.
Paul, W9AC
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