[Drake] Looking for R-4B Schematic

Dan W. Dooley dan at dooleystreasurechest.com
Wed Oct 30 14:57:50 EDT 2013


I've been discussing some audio quality issues on another thread so I won't
repeat all of the details here.  I am looking through the wiring to try to
"recreate" that wiring to the configuration it was before I replaced the
original multi-section electrolytic C90 with individual electrolytic caps.
What I find is that the actual wiring of the receiver differs a little from
the schematic in the manual I have.  I have the complete manual but it is of
the version which has the VR tube V11.  My radio does not have that.  As a
result of that difference, and perhaps some others in version, there are a
couple of component and wiring differences between the radio and the
schematic I have.
 
So, wondering where one might come up with a schematic which covers the
later version.  I'm not looking for an entire manual.  Just the schematic.
The one which does not have V11.
 
WB5TKA
 
 
Dan W. Dooley
  email:  <mailto:dan at dooleystreasurechest.com> dan at dooleystreasurechest.com
   <http://www.dooleystreasurechest.com/> Dooley's Treasure Chest 
 
 


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