B737-700
Flight Crew Last 90 Days 207; Flight Crew Type 13000
Conflict NMAC
Flight Crew Took Evasive Action
Airspace Structure; Human Factors
Flying the standard CHNNEL 2 Departure out of SNA; just after thrust cutback; approaching 1100' MSL; we received an RA climb command from a target at one o'clock and indicating 200' below. We were reducing pitch from the 20 degree climb to 14 degrees; power was at 80.7 per the OPC; and airspeed approximately 140 knots.  I advanced the thrust levers to maximum to help with the climb at the low airspeed; high AOA. Target passed behind with 100' displayed on the TCAS. I informed Departure we had a near miss; but the aircraft was under our nose and not visible. He said he had targets in our vicinity and would look into it. Once clear of conflict; we resumed the departure. The rest of the flight was uneventful. Aircraft was later confirmed to be a GA Mooney.
[Report narrative contained no additional information].
B737-700 flight crew reported an NMAC with a general aviation aircraft while departing SNA on the CHANNEL2 SID.