Hello all. Just picked up a super clean President Washington manufactured in Japan in late 1977. I friend gave it to me for free. Only issue I'm seeing with it is when on SSB and the NB is pushed in signals sound slightly garbled and when the NB is off the SSB signals sounds good and clean. Radio has not yet been re-capped. Anyone know what electrolytic cap works in the NB circuit? I'm pretty sure that might be the audio problem. Thanks.