BH Pioneer 505 with unstable target ID

[ANEWJOHN]

New to the forum. I have a new BH Pioneer 505 with an unstable target ID. As long as the coin isn't over 2-3 inches deep the target ID and the sound are usually correct. A deeper target gives a reading a notch or two further to the right on the ID and a higher sound. For an example, a 3" deep zinc penny shows up as a quarter or a 3-4" deep nickel shows up as a dime with high pitch sound. I have the same results with bench tests outdoors. My 5 year old BH Pioneer 202 works great, no problems. Even swapped coils on the 202 and 505 but didn't improve target ID problem with 505. Anyone have a similar problem or have any suggestions?

Thanks,
Anewjohn

[Sandman]

Welcome to Tnet.

Most of us have had these problems with these entry level detectors and soon upgraded to the better units.

[GibH]

Make sure it is ground balanced properly. That said, I've had 2 landstars which I believe are the same as the 505. One was dead on with the ID and the other was like you describe. The tone was accurate, but the VID wasn't.