Heard back today, they reckon that they all do this. They've got one up there, Does the same. They said they mine must not have been working properly before.
I carry a gram of gold with me, to remind myself what gold sounds like. I've have had the detector and the pointer on at the same time, and both worked without the screaming.
George from miners den in Cairns told me [ when I bought it, 5yrs ago ], that they are compatable with one another. This is right, yes???
bye