got this radio in the mail today, works ok on AM with modulation, audio is ok, PA works so I guess that means the audio IC is ok but I have no output on SSB, nothing at all. It's one of the older late 70's Cybernet chassis radios, Lafayette used it, Colt had them, lots of manfactures did, I remember something about a final or driver but my old 58 yr old brain just can't find where I put that info. Any help would be appreciated, Thank You