Make sure the cooling fan(s), if any, are working - this thing was for airborne use, and may need 115V, 400Hz. Be sure of it's power needs before using it - 60Hz will not power up 400Hz equipment.
Also, watch that duty cycle - 1:7 at sea level - 1 min transmit, 7 minutes down time....
Of course, if you can get it to 60,000 ft, you are looking at a 1:2 duty cycle....
