I just tried to fire up an old FT16000 that I was given years ago and no go. About 10 seconds after turning it on you get loud threshold sound that can only be adjusted with the volume, up until then it is silent. Nothing else changes it and even unplugging the coil makes no difference. I thought it might be an alarm that no coil attached but no mention in the manual.
I pulled the coil 5 pin plug apart and all connections look good in there. Tried wriggling wires into coil and no response whatsoever. I tried a GPX 4500 mono coil with same result but I'm not sure if it would work on the 1600 (1600 has a DD) but hoped to get some sort of response. I also pulled the control box apart and no obvious burnt bits like Rusty Dog's, or anything else out of the ordinary. Trying to work out if the coil is stuffed, or the control box, or both? Any ideas?