While tuning across 20m ssb with my recently acquired Omni VI plus I
noticed what first appeared to be S5-6 splatter from a nearby signal.
After closer inspection I realized that it was an FM modulated signal
centered at about 14.17980 MHz. I then switched the radio to FM and was
able to make out certain softly spoken words, although the signal was
wideband FM while the Omni VI + is meant to receive narrow band FM. The
FM signal appears to be from a local UHF TV station operating on about
To determine if the signal I was hearing was truly on the 20m band I
listened on both a TS-940S and a TenTec CorsairII. Neither the 940 or
C2 heard any such signal. Therefore I surmised I was hearing an
intermod product generated within the Omni VI +. I was able to
eliminate the intermod by inserting an old Johnson Viking LP filter in
front of the Omni VI+.
Has anyone encountered or heard of a similar UHF intermod problem with
the Omni VI?
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