Loud signal, NO VDI reading

[Toolman0114]

Why is it that I'll get a loud signal, but no VDI number shows up on the screen?

 

[LTimedigger]

Every time I've had this happen its been large iron. Switch to the 4fx and see if you get a reading.

 

[Digger 45]

I have had very deep silver do this, a 1943 silver dime at 8" deep gave no reading from any angle but sounded good. No reading at all. Now it wasn't a extra super loud signal but a good constant signal. Very loud signals and where you can raise the coil 8 to 10 " off the ground and still hear a signal is usually large iron or a can.

 

[NYNURSE]

The only time that has happened to me, I had the wrong coil. Headphone were giving a good sound but the controller was flashing No Coil detected. Hey, once in 4 years, I'll fess up to it.