[GreenKeys] Dtc

[Gerry Block]

Harold
  For your project you might look up the old patents held by Frederick Electronics regarding the design of the DTC known as the decision threshold computer. This was a rather complex rc circuit which tracked the peak (Dc) amplitudes of the mark and space channels and biased the output comparator (“slicer”) threshold to provide the most advantageous switching  point. In a bipolar design this would be 0v in perfect conditions.  But during selective fading it would move the threshold to as far as  .5 x the working channel peak amplitude. 
They did a lot of real research work in this.   Irv hoff and Keith Petersen took this design (which I think came from Vic Poor) into the TT/L design  and I think there are also some descriptions in issues if RTTT journal. 
Best
Gerry 
AD6MC