Some very strong received SSB signals, may grossly "distort" the audio quality.
The following modification will cure this problem!

#    Remove    C 31    ( . 47 uF )
#    Change    R 43    (  10 K )    to         1 K.
#    Change    R 41    ( 150 K )    to    270 K.
#    Change    R 47    (  1.5 K )    to      3.9 K.

All this parts are found along the rear of the 2902 IC
Thats all you have to mod!
