I have a PD-2 SSB adaptor,
but I think there are some improvements that could
be made to it.
1) There is no handy way to mute it.
2) There is no variable pass band tuning.
The Drake circuit with their 50 KHz I.F.
and a B.F.O. 50 KHz away from 455 KHz
will be available someday.
The pitch is high on CW.
73s Robert K5LYT