Inside the Radio Compartment of the Commemorative Air Force's (Mesa, AZ) B-17G 'Flying Fortress' a WW-II heavy bomber on display this week at the Fargo Air Museum. This B-17 is painted as quot;Sentimental Journeyquot;.

Radio Receiver BC-348-Q
U.S. Army Signal Corps

During the middle of WWII, the BC-348-J, N and Q quot;Later Versionquot; of the receiver was introduced. This new version had to be interchangeable with the earlier BC-348 so physically both versions appear almost identical. Inside, however, several changes were made to reduce the cost of building the BC-348 but still maintaining its high level of performance. The quot;laterquot; version reduced production costs by simplifying the construction and component mounting which additionally made depot repairs of these quot;laterquot; receivers much easier. The quot;laterquot; circuit used two RF amplifiers, a converter stage, three IF amplifiers, a duplex diode/triode provided Detector, AVC and BFO functions and a 6K6 provided the audio output. -radioblvd.com/bc348_dynamotor.htm