woody

There is a good mod that you can do on all SD detectors to brighten up the sound. It involves adding a series resistor to an existing capacitor in the audio output circuit. I have field tested this and it gives a lift to targets that are deep or very small.

The early S/N units had a series of capacitors replaced, 10nf for memory. It is hard to hand solder these caps through the White paint and these pics sort of show it. The balls of solder are created when a hot air rework tool is used, The silicone? falling off is strange as they use a hot melt glue on most units. Be careful with the Mylar strips as they can crack at the connector. I have a fix video on youtube if you want to DIY.

I am sure but I am not going to start WW3 .

I find it very difficult to believe that Ismael saw a detector that I did in May with an overclock mod? I have only carried out very few of these types of mods, maybe only 4 detectors. Now I stopped doing the Overclocking in December! Now this business about mods being turned off and on by a switch is mighty fine if all you are doing is putting a switch in to change the eprom address. So yes you can turn it on and off the same as the diffent pulse timings but these are very simplistic mods that a detector owner can do themselves. Now I change the following, Input N and P channel Fets, 15 volt output Fet, Increase the drive current to the Fets, replace the input dual gate clamps with better specification devices, add power supply filter capacitors, trim the feedback resistors on opamps, change the input cores to low loss types, add bypassing to the stabiliizer stage, change ground points to reduce current noise in the front end and others that are detector model specific. These cannot be changed by a switch, if a detector can have its mods turned off then back on its a very simple mod. PS...I did not invent the overclocking mod, it was Mick , Nanotek electronics that was carrying out this mod in W.A last year. A mod analogy...Have car, install bigger carby and extractors, turn said devices on and off, its exactly the same concept. And while some think that they are made from Teflon, why did i get a phone call from a certain person from this forum in the U.S that asked me how to remove the mods from his GPX4000 that started failing after 5 minutes that was modded by someone other than me? Someone who shall remain nameless!

Ismaels mods work well, His GPM SD2000 with the VCO mod is on par with the GP series of detectors. Mods let you optimize the detector parameters to suit the type of ground and the type of Gold that is being hunted. The GPX-4500 is just like a modded GP to a degree. Obviously the GPX has more refinements but the modded detectors do work much better than the standard detectors. I Think that Andrew (Pennyweight) is going to carry out some in depth tests and make a video of the results. I have shipped an upgraded Extreme to him last week and i think he will be using this to do the testing.

So you are saying that changing a Crystal ruined his detector? Funny how he has never emailed or rang me up to tell me of this, all that would happen by increasing the frequency is that the ground balance would track faster. As the processor being the the Hitachi H8 series can be run at 20 Mhz I fail to see how this ruined his detector? Please enlighten me, are you Narrawa? Strange that you are acting as you are his mouth piece. Could you tell Narrawa that if he sends the detector back to me that I will replace the 35 cent Crystal with a correct factory spec 4.00 Mhz one.

Actually Mr Inhere,the detector that you allude to was supplied by Andrew Overton and given to Alluvium (John C) The detector tested was modded by Ismael, it was a modded GP with faster clocking and John did not like it at all. so please get your facts straight again, I think you owe me an apology.....as per usual....but i will not hold my breath! Again I am publicly defamed by "Inhere" when the said detector was not supplied by me in the first place. What is your agenda Inhere?

Inhere, Who is this person that I have "refused" to make good an experiment? Was it you? There was a time that I offered an all risk and no charge to anyone that wanted to test a faster clocking modification. Remember it was a test and I even paid for the postage and parts , and time all for free. I have never been told by this person to remove the 7.6 Mhz Crystal and put it back to 4 Mhz. You just keep on spreading lies all the time. Anyway your defamation postings are being collected by a Melbourne based law firm, then we will prove who is the biggest lying loser on the forums. Maybe you would like to talk to them before you get the writ? Rotstein Lockwood and Reddy Lvl 5 552 Lonsdale st Melbourne. Contact Dean Lockwood 03 9604 7801. Hope you have a few assets for me to claim against.

40 oz Nugget at Creswick a few years back, total from 1980 to current day would be 276 Oz but most of that was 1996-1998 when the P.I units came onto the scene, last time I went out i only came home with a 0.9 gram bit..

Modded detectors do not work? Funny to think that every detector from the SD2000 is a modification of the previous design. As for detectors failing its not me who has had to recall hundreds of brand new detectors. As for "Inhere" this guy has had a vendetta against me for a few years, read his posts and somehow he will twist the truth or vary the thread direction to incorporate some defamation about "Woody". Anyone would think he is a large shareholder in Minelab/Codan. There is not one ounce or gram of truth in any of his defamatory postings. People see through his thin Glass vindictive veneer and it generates lots of work for me. Thankyou "Inhere", I could not wish for better advertising if I had to pay for it.

The code that is used on the 3000 series has already been modified by a couple of techs in Australia, Did you hear that M/L contacted a certain person who is developing a new detector in order to buy out the project?

Hi Guy's This forum is read by a lot of manufacturers as I have found out by getting a couple of emails and phone calls. Maybe I could send the Mod details to Reg and he could Mod the SD2000 for the U.S users. Apart from that I may have a mod for the 3000/4000 series that gets rid of all (most) electrical interference, just need some control boxes to mod and get some field data back. Maybe Reg can do this in the U.S? DWT, Just think that if M/L kept the SD2000 timings and married that with the 4000 integrator set up what a detector we would have

It is sad when I have owned just about every M/L detector from the GoldSeeekers 15000 to the modern units. It must say something when I have ditched all of the M/L detectors but stick with their first offering P.I the SD2000. In my view each new model of M/L detector was a step backwards, especialy on deep targets. Just by increasing the clock rate and other small mods I can detect small Gold like a 4000 but I can detect all Gold deeper than any later offerings. To have the best Gold detector on the market all one needs to do is find an old SD2000, change the preamp IC reset the bias point, change the output fets for lower rds on, change the source resistors, change the damper resistance, increase the gain in the integrators and the filters, add low and high frequency crystals to cater for small or large deep Gold, run the thing on 8 volts or more if you want to modify the internal switchmode supply to handle it. There you go , an all round detector that shits on every other offering to date.

If you want small Gold just get an old SD2000, up the clock frequency, increase the filter gain and it will out detect a 4000 with ease. I found that the GS5B would find Gold the ML machines missed if the ground was extremely hot. ML only developed the smooth mode in order to compete with the quietness of the GS5B. I am also hearing good things about the Whites machine, should be a very serious competitor to ML, especially in Australia.