Thursday, January 14, 2010

Origial Flight Hardware: ATC Transponder


For the Lockheed L-1011 project, I picked a old Gables 4096 Transponder that I restored a few months ago. Don't have the electronics retrofit for it yet, but it will be one of the first ones I work on. The ATC Transponder is located on the center console of the Lockheed L-1011. The panel that I will use is not a TCAS panel.


The elements of the ATC TRNASP panel are.

  • TRANSPONDER SELECTOR SWITCH - OFF .. turns the transponder off, STBY .. puts the transponder subsystem into a non-transmitting standby mode, ON .. is the normal operation of the transponder system and LO SENS .. puts the transponder into low sensitivity mode.
  • SYS SWITCH - switches between two different transponder systems .. one acts as primary the other as standby
  • CODE SELECTOR - there are two double stacked knobs; one for each digit
  • IDENT - momentary pressing button increases output signal for about 10 seconds
  • MODE SELECTOR SWITCH - The panels supports ATC transponder modes A, B, C and D.
  • ALT RPTG - when in the OFF position, the altitude reporting function is turned off.


Panel Location


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