[GreenKeys] Might be a bad weekend...

[Alf Fisher]

David I. Emery wrote:
  ...  The R-390As actually used with VFT signals had an outboard tracking 
demod (a CV-157
if I remember right) that tracked the partially suppressed carrier with a 
mechanical servo (I kid you not)....


In the Signals Museum, there is a 1960's Marconi HR24 Dual Diversity 
receiver rack that I am about to begin restoration which uses a motorised 
servo AFC system that operates on reduced carrier SSB.  The motor is driven 
by four 6BW6's (actually CV2136).  Trouble is, I dont think there is any 
reduced carrier SSB around these days.

Alf Fisher
G3WSD
Bedfordshire UK