I was under the impression that the reason for the BNC front antenna port is because the radio was intended and designed for portable, over the shoulder, strap/case carrying. Thus the antenna, specifically the U/VHF for pedestrian mobile would need to be vertical. Makes some sense.
Mike Davis WA1MAD
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On Apr 19, 2025, at 2:22?PM, HIRO, JJ1FXF via groups.io <jj1fxf@...> wrote:
?Generally speaking, the BNC connectors are better impedance matched than the M-type (SO-239) connectors. And this may affect more on V/UHF frequencies.
So the rear M-type connector is for the HF and the front BNC connector is for above 6m as the default settings of FT-817/818, I suppose.
However, such a QRP RIG, I personally do not care for the impedance matching but I select connectors for my convenience. hi
// HIRO, JJ1FXF