AEST PLT DEPS VFR FROM SDL TO OBTAIN VFR FLT FOLLOWING AND IS ADVISED BY SCT DEP TO RETURN TO LAND BECAUSE OF NATIONAL NOTAM RESTRING VFR FLT.

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ON SUNDAY AT XA30 LOCAL; I FILED AN IFR FLT PLAN FOR KMYF FROM KSDL WITH RENO FLT CENTER (800 WX BRIEF) BY CELL PHONE. I CONTACTED ATIS AND WAS TOLD THE TWR WAS CLOSED AND TO CONTACT DEP ON ONE OF THEIR FREQUENCIES. NEITHER OF THEIR FREQS COULD BE RAISED FROM THE GND; SO I DEPARTED AND CONTACTED DEP AT APPROX 400 FT AGL; 0.5 MILES W OF THE ARPT. I WAS TOLD BY DEP THAT I WAS IN VIOLATION OF THE RECENT CLASS B VFR NOTAM AND TO LAND IMMEDIATELY. I RETURNED TO SDL. I CONTACTED THE LOCAL FSS AND WAS GIVEN A DEP AND VOID TIME AND DEPARTED WITH NO PROB. 1) I DEFINITELY VIOLATED THE CLASS B NOTAM. 2) THE LOCAL ATIS SHOULD NOT HAVE SAID TO CONTACT DEP FROM THE GND; BECAUSE THE LOCAL KNOWLEDGE WAS THAT THAT WAS IMPOSSIBLE. 3) I WOULD ALSO SUGGEST THE ATIS SAY THAT DEP COULD NOT BE REACHED FROM THE GND AND THAT A VOID TIME WAS NECESSARY FOR IFR FLT. WHEN I CALLED WX BRIEF TO FILE MY FLT PLAN; MY CELL PHONE CONTACTED RENO. IF I HAD TALKED TO THE LOCAL BRIEFER; I AM SURE I WOULD HAVE BEEN GIVEN A VOID TIME. SINCE I WASN'T; I INCORRECTLY ASSUMED THAT DEPARTING VFR AND OPENING IN THE AIR WASN'T IN VIOLATION OF THE NOTAM.