Inventiveman

The knob on the front of the RB 10 is Variable Speed Retuning (VSR). It was a mod provided by the importers around 1983-4. This helps to smooth out threshold sounds from highly mineralised ground. Think of it as Auto tuning on some other makes -VSR minimum =Manual, VSR Maximum=Auto, other positions=in-between. The Red Barons were one of my favourite detectors in the early 80's and are very good in highly mineralised ground & on the wet salt sand eg beaches. I've found lots of gold & coins in both locations with mine. I still use my RBs (5 &10) on the beach and turned up a lot of silver coins & a sovereign after the severe storms a few months ago with my RB5. It's really great on the wet salt sand in SPD discriminate BUT set the discriminate level to its minimum level otherwise you're very likely to miss gold jewellery. A tip for the old goldfields: Where there's a lot of ferrous junk: the SPD motion discriminator works very well in mineralised ground IF USED CORRECTLY unlike a TR discriminator which DOESN'T work reliably in mineralised ground. To use SPD correctly: - search in the ALL METAL mode - set threshold low but audible - set discrimination level to minimum - preferably set VSR to minimum. When you get a signal, pinpoint the target & remember or mark where it is - (important) re-adjust the ground balance at the side of the target -- switch to SPD (with either the switch or the button on the handle) - step back a foot from the target - start swinging the coil parallel and close to the ground between your feet & the target - slowly approach the target while swinging the coil as you listen to the threshold sound. The threshold will do one of FOUR things as the front half, and then centre, of the coil starts to pass over the target: 1. Increase & give a solid long sound - passes discriminator, DIG it. 2. Stays the same - deeper than the discriminator can reach. Remove some dirt & retest. 3. Sounds erratic - likely to be iron but not always so DIG it. 4. Decreases or stops -very likely to be iron especially when a small target. Leave it. Leaving such a target may very occasionally miss a piece BUT the time saved digging and locating hundreds of pieces of small iron gives you much more time to find non-ferrous targets including nuggets. REMEMBER detecting is being banned in more and more places because people are not filling in their holes. SO PLEASE FILL IN ALL YOUR HOLES