Original NOS U.S. military Echo Box TS-270B/UP T-shirts military in the late 1960s

military in the late 1960s

600 fps (factory loads

📊 Condition Notes (based on your photos)

military officers and aviators of the period due to their reliability

spare fuse holders

Original NOS U.S. military Echo Box TS-270B/UP T-shirts military in the late 1960sOriginal NOS U. S. military Echo Box TS 270B UP, manufactured by Amerac Incorporated, serial number 153, order number 4399 PP 60. Comes with its marked metal storage case, technical manual TM11 1086 for Echo Boxes TS 270 UP, TS 270A UP, and TS 270B UP, and the original packaged carrying strap. This unit was used as radar test calibration equipment for checking transmitter performance and frequency response. The assembly includes the main echo box