for comments e-mail me at montpublib at juno.com
pic1 is a 1930s radio sond
pic2 is a 1920s aircraft generator-xmitter
pic3 is a 1930s Western Electric aircraft receiver
pic4 continues pic3
sw3 and sw3a provide coil winding data for the SW3
BC-189 is the schematic for this receiver
data for the COMET and COMETPRO is in the data section
Here is the Link to the data area.


Here is the Link to the WS-48 area.

Here is the Link to the RR1A area,

Next are the schematics for the BC-148,BC-151,BC-156
Here is the Link to the BC-56 area,