coal finds

[rhyso]

ive been scanning away at my spot for a few weeks now, nice finds and all the rubbish to go with it but ive been finding a lot of coal / really hard carchole. machine thinks its metal  any ideas?

[romano-brit]

what machine do you use?? if its a goldmax they love that sort of thing

[Neil]

They are what we call Hot Rocks Rhyso.

They tend to be coal or charcoal that has been fired and will show up on some machines, but not all. They used to be a pain on my Muskateer, but not evena squeak on the Explorer. On the plus side - I have always taken the finding of them as at least showing occupation on a site.

Cheers
Neil

[tyna]

Rhyso - if you have a meter on your machine it should give a good indication and stop you digging them  :

[rhyso]

i thought hot rocks were actual rocks not burnt material??. im using ace 250, you cant discriminate as they usually show in silver range on my machine! time to get a better machine?!

[Chef Geoff]

Your right Rhyso, they are not "Hot Rocks" in the true sense but are just pieces coke, They will sound off in the silver range on many single frequency machines and so you disc them out at your peril, however they will usually appear in the same place and the tone is slightly different to that of a good target in the same region. A bit of practice listening to their signal and that of a 10p (if that's close) may help you to be able to tell the difference.

[win]

I think hot rocks often come from the old steam engines that were used for threshing, binding, etc. These enormous machines were the first efforts at mechanisation of farming and must have been a major step forward at the time.

[dances with badgers]

lumps of coke on the beach from the steel works

[Chef Geoff]

I think hot rocks often come from the old steam engines that were used for threshing, binding, etc. These enormous machines were the first efforts at mechanisation of farming and must have been a major step forward at the time.

Yes I think your right Win much of the coke that turns up probably comes from the old steam ploughing.

[Meatslicer]

In the Vale of Glamorgan they have used huge amounts of coke on some farms as land fill (like green waste) and as drainage additives for farm gate ground cover. They usually give a bouncy signal, meaning the signal seems to jump about and give inconsistent audio responses on my Etrac, and a loud iron response on my CScope. Either way, the audio can be used to screen them out because it is such a messy signal it is obviously coke.

Eric

[rjm]

On the Deus they come in about 25 or 26 on the VDI which is normally in the junk range. I dig the occasional
one just to check sometimes. Small iron is normally discriminated out at 10. The hammered are normally 40 +
which is a good thing for us!

Minelab multi-frequency machines normally discriminate them out, but some users running their machines "hot"
complain of finding them.

I know some people have a terrible problem identifying them with their machines.

As said, in some ways it's a good sign as it signifies that the field has been "worked" in the past.

[rhyso]

interesting response's thanks all. most have been found close to trees, im in a woody area so may be signs someone has been clearing out and burning old twigs and sorts, the area is quite well looked after. any suggestions for an upgrade?? gti 2500?? 

[Chef Geoff]

GTi 2500 Not unless your thinking of moving to the States any time soon

[rhyso]

not at all, ill never set a foot on US soil! there cheap to buy from there bout £600 plus customs charges, whatever they are! Any other suggestions? got up to £800 to spend spend spend!

[rjm]

not at all, ill never set a foot on US soil! there cheap to buy from there bout £600 plus customs charges, whatever they are! Any other suggestions? got up to £800 to spend spend spend!

A Tecknetics Omega 8000 with T2 coil ............. new with a lotta change.