[R-390] SSB for the R-390A

[Pete Williams]

   Feeling  a bit  adventurous  after  adding the  Treetops Circuits  SSB
module  to my  R-390A  I felt that  using the   pair of  BFO
xtals  I had would be a useful addition for  selecting  either  sideband as
well as using the  inbuilt  BFO in the
 receiver.
The  accompanying photos  and  circuit  description  -in the  pdf  tells
the  story of  adding the  switchable  xtal  and
interconnections. Non of the  alterations involve major  circuit  changes
and  completely reversible.

I'm happy to  supply  any words of  encouragement and /or clarification as
required.

Pete  VK3IZ