Help, I went to use my older model Sovereign and when turning it on it just makes a constant noise (used to be quiet until threashold was increased) When sweeping over metal the sound varies then goes back to the constant noise.
I have tried disconnecting the Bar meter and plugging the coil directly in the contol box (no difference)
Also how do I take the casing off to check inside
Cheers from downunder
I have tried disconnecting the Bar meter and plugging the coil directly in the contol box (no difference)

Also how do I take the casing off to check inside
Cheers from downunder