Is the minimum turning radius for 3 1/8" air line 30 inches or 36 inches? Should you use 8 inch conduit or should it be larger? Andrew Skotdal, President/General Manager S-R Broadcasting Co., Inc. (KRKO-AM) NorthSound 1380 2707 Colby Avenue, Suite 1380 Everett, Washington 98201 425-304-1381 x 102 425-304-1382 fax 425-750-5000 cell