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#1

moeee
Banned
From: St Albans, VIC
Joined: 29 June 2018
Posts: 337
Banned
10 July 2018 03:46 pm

These detectors and similar are under 100 bucks.
I was wondering if I learnt about coil winding and stuff , would it be possible to improve performance to the stage where I could find a 1 gram nugget with this detector ?
Or if I leave the coil , would I need to increase the sensitivity of the electronics in the circuit ?

Or is there nothing really I can do with this because it is already been engineered to perform at its peak as it is otherwise the designers would have done so ?

I don't really wish to go deep , but I would like to pick up any 1 gram nuggets within an inch or so.

perhaps my best first step is to find out its current ability.
Would a piece of lead say 2 millimetres in diameter be a very close approximate to a piece of gold of the same size ?
I mean would they both be equally easy to find?
I cannot afford to purchase an actual nugget of gold.


You can choose your friends but you can't choose your enemies

#2

Dron
Member
From: Wollongong, NSW
Joined: 06 March 2016
Posts: 237
Member
10 July 2018 08:40 pm

A piece of lead should substitute nicely for a gold nugget.

I have absolutely no idea about the rest.


SDC2300 aka "The Birdshot Bandit" + SP01 + Gog Phones. Equinox 800 aka "Johnny kNOXville" + Tyger Snake digger. Wollongong based.

#3

moeee
Banned
From: St Albans, VIC
Joined: 29 June 2018
Posts: 337
Banned
10 July 2018 09:32 pm

all good - I shall have a bit of a play tomorrow at least getting a size of lead piece as a model that the unit picks up.
I'll get a bunch of different sizes of lead and bury them at different depths and make up a chart
But first I shall find the smallest piece it will pick up just laying on top the ground


You can choose your friends but you can't choose your enemies

#4

Goldpick
Moderator
From: Mount Gambier
Joined: 07 November 2013
Posts: 7,919
Moderator
10 July 2018 10:05 pm

Two things you are forgetting are frequency and lack of ground balance. At 7.5kHz this detector is not exactly designed to be sensitive to small low conductor targets, moreso setup for high conductor coin targets. Even if you were to be able ping on a 1 gram test target on air testing, it doesn't guarantee that you will be able to hear the same target on mineralised ground, especially without adjustment for ground balance.

Ramping up the sensitivity will most likely have a negative effect, run too high and you will probably get too much feedback from the ground, even to the point of the ground noise consuming the target or making it impossible to distinguish one from the other.

There is a fair bit of fine tuning involved to enable a VLF detector to run stable over variable ground mineralisation, even on units designed specifically for prospecting. Since you have a lack of adjustability on the MD 3010, seem like a bit of an uphill battle to turn it into the type of detector you are after. Yes a smaller coil may hold some advantages, though is it really worth the trouble on what is essentially an entry level coin detector.

Really only one way to find out for yourself really, take it out to the goldfields and see how it handles the ground - sometimes you need a base line to start from, just I did when I first tried prospecting with a no name detector. Took me a few days of frustration to realise my detector wasn't going to cut the mustard (ie signalling off everything), and something more suitable was going to make life a lot easier and more fun.


Prospecting gear: Used - Whites GM3, GM2, GMT, ML XT17000, ML X-Terra 305, Garrett Gold Stinger, Tesoro Vaquero, Nokta RS pinpointer, Minelab Explorer SE Pro/Etrac, Ace 250
Current - XP Deus, Makro Racer 2, Fisher F75, Tesoro Tejon, Teknetics G2, Whites SPP, Garrett Infinium, Minelab Go-Find 60, XP MI-6, Minelab Profind, Whites Bullseye TRX, Deteknix X-pointer, Garrett AT Pointer

#5

moeee
Banned
From: St Albans, VIC
Joined: 29 June 2018
Posts: 337
Banned
10 July 2018 10:30 pm

Thank you for your response.
I really hate spending money on stuff and would much prefer making something somewhat useful out of other peoples discards.
I read about a guy who finds 40 bits of gold every time he goes out with his godld monster.
But these bits resolve into about 1.5 grams. Which is say $75 ?
His machine has well and truly paid for itself , but he is simply a superstar and have never seen anyone else post anything remotely like that man can find.
I would like to just play prospecting as a hobby that costs about as much as I will probably find - nothing.
But if I can gain knowledge then that would make the time wasted messin' about justified.

I guess I should heed your advice about bypassing the frustration with the noname detector.
But heck , whats there to lose except the time , which is Free.

Truth be told , I found the unit in the annual kerbside rubbish collection which is happening in my area at the minute.
Otherwise I wouldn't have even considered the attempt.


You can choose your friends but you can't choose your enemies

#6

Goldpick
Moderator
From: Mount Gambier
Joined: 07 November 2013
Posts: 7,919
Moderator
10 July 2018 11:09 pm

Nothing wrong with having a tinker with things, especially if it comes at minimal cost. What I wrote is just a personal view on things, when going detector I just prefer something that is proficient for the job at hand. Some of my older posts show a Whites Goldmaster 2 which I bought from the US in non-working condition for a minimal outlay. Ended up rewiring it and refurbishing it with a new shaft setup and updated coil back to working condition - was a fun project and satisfying to see an older detector back in action again.

Gold prospecting is more of a hobby than anything for most people, unlikely they will ever get a enough return to make it worthwhile, just the satisfaction and thrill from seeing a bit of gold for their efforts.


Prospecting gear: Used - Whites GM3, GM2, GMT, ML XT17000, ML X-Terra 305, Garrett Gold Stinger, Tesoro Vaquero, Nokta RS pinpointer, Minelab Explorer SE Pro/Etrac, Ace 250
Current - XP Deus, Makro Racer 2, Fisher F75, Tesoro Tejon, Teknetics G2, Whites SPP, Garrett Infinium, Minelab Go-Find 60, XP MI-6, Minelab Profind, Whites Bullseye TRX, Deteknix X-pointer, Garrett AT Pointer


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