coyote26 Posted May 19, 2010 Share Posted May 19, 2010 hello to everybody, i have a doubt about the operation of the radar,in our planes the radar power is 115 ac y 28 dc from main.i wanna know if in the position stand by and antena down the antena stab is energized? Quote Link to comment Share on other sites More sharing options...
tinyclark Posted May 19, 2010 Share Posted May 19, 2010 (edited) Yes, the STAB circuits work on the antenna in STBY, but only after a 3 minute warmup for the gyro to stabilize. From 12P5-2APN59-32 9-42. Approximately 3 minutes after the application of a-c power to the heater relay K1459, pin 2, the relay energizes. Internal contacts of K1459 mate to apply 28-volt d-c energizing power to relay K1460. When relay K1460 energizes 115-volt a-c power is removed from the relay K1459 heater filament and applied through pin T of J1451 to the rotor windings of the pitch and roll synchro transmitters in the Stabilization Unit. Relay K1460 is latched in the energized state by 28-volt d-c power through its own contacts. Edited May 19, 2010 by tinyclark Quote Link to comment Share on other sites More sharing options...
KF4DVG Posted May 20, 2010 Share Posted May 20, 2010 And the coolest thing is that it didn't take any dang software to make it all happen! Quote Link to comment Share on other sites More sharing options...
tinyclark Posted May 20, 2010 Share Posted May 20, 2010 And the coolest thing is that it didn't take any dang software to make it all happen! LMAO!! Quote Link to comment Share on other sites More sharing options...
TSgtRet Posted May 27, 2010 Share Posted May 27, 2010 And the coolest thing is that it didn't take any dang software to make it all happen! Software? When I was working the APN-59D on the 130s and 135s the running joke was they (Sperry) had taken the 59, switched it to solid state components........and made it 75lbs heavier; that was considered progress. I shudder to think what adding software to the 59 would do! Quote Link to comment Share on other sites More sharing options...
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