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  1. X

    Whites SPP Adding Conductivity switch

    I couldnt find any reference to C42 in my notes. I did find a reference to C56 being shorted.... " To give the TDI SL model all the performance of the TDI Pro, and maybe even better, you want three mods: First mod is the 16v battery pack. Those are no longer being sold, so you have to make...
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    Whites SPP Adding Conductivity switch

    prob a flat head jewellers screw driver, if not then a very small allen key. You should see a nice improvement in setting threshold with the 10 turn pot. The 10 turn pot for GB is a big improvement for mineralised ground like Oz but not sure it will help in UK. Cant hurt and only a few more...
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    Whites SPP Adding Conductivity switch

    normal twist bit & battery drill on a lowish speed should be fine. Since you will cry if you crack the case whilst drilling I suggest you practice drilling with a piece of scrap perspex & use the drill & bit you intend to use on the real deal. after a few holes you will find out how much...
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    Wanted Reeds Prospecting Booklet - Gold Book Vol 1 Eastern Gold Fields

    Chasing a copy of Reeds Prospecting Booklet - Gold Book Vol 1 Eastern Gold Fields. I was in their store a couple of weeks ago & they were sold out. happy to pay a reasonable price, even more if it is well thumbed & you havent rubbed out your Xs :)
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    Waterproof cover for Whites TDI SL

    Given the way the box connects to the shaft and the position of the arm cuff, I think that waterproofing is impossible and even basic rainproofing is a real challenge. I keep a large tough clear plastic bag folded up in my backpack that i usually use for samples but in event of unexpected rain...
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    Whites SPP Adding Conductivity switch

    a excellent! Looks like it might really require just a switch. Again from my poor memory the C42 mod ( shorting the terminals across Capacitor 42 by dragging solder or just wrapping a single copper strand on the component side of the board) is a seperate mod to the conductivity switch and...
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    Whites SPP Adding Conductivity switch

    Did you do that mod yourself? If so what was needed?
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    Whites SPP Adding Conductivity switch

    Thanks karelian ! when i am back home i will look up my old Reg Sniff notes and see what he said about the conductivity addition, whether he gave specifics or just that it could just be done in principle.
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    Whites SPP Adding Conductivity switch

    On both boards just top left of the black headphone socket there is a cream connector socket marked "Cond Mode". It looks like a 3 Pin PH type to me. Buy a premade cable and if has both male and female connectors installed just cut off the female. solder the three wires to your switch and...
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    Whites SPP Adding Conductivity switch

    What you need is an ON OFF ON 3 position SPDT toggle switch. not momentary ! voltage and amperage ratings irrelevant as application V and A both are very low. Size not so important either if you are not mounting on box , then after soldering I would just coat the exposed terminals in...
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    Whites SPP Adding Conductivity switch

    Rog, why not just open up your SL and have a look at the switch and wiring? I have photos and how to description somewhere here on PA if you search.
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    Qld vs Wa

    Bush Chooking ! That is so apt. True, he was asking about working the ground seriously, and that sounds too much like umm... working :)
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    Whites SPP Adding Conductivity switch

    Conductivity switch on TDIs latch in each position, High, All, Low. In the High / Low position they cut off the Top/Bottom of the signal wave form. It is a rudimentary but effective form of iron discrimination. It works in a bit different manner to the VLF machines type of discrimination...
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    Qld vs Wa

    1. QLD laws are MUCH more restrictive than WA. in QLD prospecting is only allowed on private property with permission or in the very few and quite small General Prospecting Areas. Also there is no 40e. 2. Most of the QLD goldfields have a lot more vegetation than WA goldfields, to the point of...
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    TDI Pro/SL Lithium battery Voltage Reader

    I only put the 16V battery tray in my SL just before using it and take it out at end of the day to recharge. Leaving the battery in the detector, the volt meter will drain the battery over a week...ish, so less than 5% reduction in battery runtime. could always add an external inline switch...
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    TDI Pro/SL Lithium battery Voltage Reader

    I use these cheap slimline self powered volt meters a lot. They need about 3V to display and generally read upto 30v depending on model. stick one on the top or side of your box and run the wires to the battery connector in the box and you have turned your analogue TDI into a modern digital...
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    SDC2300 Batteries and Chargers

    you can make your own battery holder with: 1x bit of 20mm white pvc tube 4 x push on 20mm end caps 4 x ~4mm dia x 12mm long springs. all bits are from Bunnings and total less than $25. Basically 1)cut tube so that when end caps are pushed on the whole thing is same length as 2xC cell...
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    Fools gold or real gold

    sounds like it could be mica but if you have "pounds of the stuff" that light be gold then then you have more than enough to do a density test & more than enough to afford an XRF
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    Help Identifying Gold-Like material.

    If they dont dissolve in brick acid or melt when you put a butane flame on them ( jet cigarette lighter) I would say gold. If it has been beaten wafer thin like gold leaf then it will float-sink if it gets any oil on it
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    Questions about prices and certain functions

    7000 - no direct experience, just mates, but a generally solid build, no distinguishing earlier model I know of. 6000 - suffers quality issues both coil & box. Earlier ones more so but even current ones are not perfect. read the PA posts. Just have to decide if risk is worth it. Plenty of...
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