B-17 Pilots Manual.pdf

"'.,'"....-..-10. COMMUNICATIONS EQUIPMENT~. GENERAL. -, A radio and interphone systemprovides for communications between crew memberswithin the airplane; between the airplane and groundstations or other airplanes; reception of weather,range, and marker beacon signals; and ground andinterphone identification.Q. INTERPHONE SYSTEM. - Interphone jack boxesare installed at 11 locations in the airplane. With!!!!yselector switch in "CALL" position, that station maybe heard at all other stations regardless of the positionof their selector switches. With all switches adjustedto "INTER," any station may be heard at all otherstations. Any station may listen to the liaison, command,or radio compass receiver by adjusting theselector switch to those positions. Any station canmodulate the command radio transmitter; however,modulation of the liaison transmitter is provided forpilot, copilot, navigator, and radio operator. All stationsare provided with throat microphones, which,with the exception of thosefor the pilot and copilot,"ire controlled by "PUSH-TO-TALK" switches onthe cords. They are connectedto the jack boxesby extension cords.£. OTHER COMMU-NICATIONS EQUIPMENT.Instructionother comfor operatingm u n i cat ionequipment will be found inthe section covering thecompartment in which theequipment is located.~,..e .......Figure 18InterphoneJack BoxIII-~~ \)~~ - - - - \!C "3/I I/ I~ ~ ""'""'~ , I(- ~ ~ ' ~C- /' '-~u;iT 6 ,1/ /"- ""- y' ""-6C\ (" "', />/ "8)0/ --- "'\. ' "'-:6 ~,~~""- /=~ ~.>-- / , ,., . - W /' ~~ :;;;-, ~ ~ ""'"// / _/ . ,/ ","",' ~r( ,-:-- T-' ~\ ,"'' // / ~' ",,'."," '" 0-000' '" .-, " / / ~ ""~.. ~:' ,.,.., '- , ::" """oi.. ' .,INTERPHONE R' 3 a 4 RESPFigure 19 - Communications Equipment14