Mr Bills Mod Help on a classic SL ID

[Carl-NC]

first on the "Ring Range Presetting" all coins were being picked up OK. then on the "Coin Range Presetting" not all the coins were being picked up. only the coins in the top row of the photo. does that seem about right do you think?

Ring range should pick up everything above foil, coin range will reject some cupro-nickel coins but should accept most copper & silver coins. I'm a little surprised it accepts the Irish 3p and rejects the farthing. As for the other rejected coins, I'm not as familiar with them, but a lot of thin hammered silver coins can ID in the cupro-nickel range.

[keith777]

Ring range should pick up everything above foil, coin range will reject some cupro-nickel coins but should accept most copper & silver coins. I'm a little surprised it accepts the Irish 3p and rejects the farthing. As for the other rejected coins, I'm not as familiar with them, but a lot of thin hammered silver coins can ID in the cupro-nickel range.

thanks so much for that Carl. much appreciated. i will do some in ground testing with the machine and see how i get on......

[kt315]

k777, sorry, but deja vu. you had did the mods in 2022.

Mr Bills Mod Help Please. - Geotech Forums (geotech1.com)

[keith777]

k777, sorry, but deja vu. you had did the mods in 2022.

Mr Bills Mod Help Please. - Geotech Forums (geotech1.com)

yes but this machine had me a bit confused, as someone who owned the machine before me had replaced 2 resistors out of the four that is mentioned in MR Bills Mod to be replaced. plus 1 resistor that is not mentioned in the mod. if it was not for that one resistor that had been changed. i would of just done the mods to the machine and not made a thread/posts about it. i was just wanting to make sure that the resistor not mentioned in the mods would not affect doing the mods to the operation of the machine afterwards. i am no expert in electronics at all.

[Nightryder]

I replaced R7 in my IDX pro with a 200 ohm trimpot, and then with my oscilloscope I managed to find the best result. You can actually do it without the o-scope by air testing it with a coin until you get the best possible depth.

[keith777]

I replaced R7 in my IDX pro with a 200 ohm trimpot, and then with my oscilloscope I managed to find the best result. You can actually do it without the o-scope by air testing it with a coin until you get the best possible depth.

thanks Nightryder for that idea. do you have any photos of when you did that mod......

[GeoMax]

Hi,

I found the following to Mr. Bill modifications. Maybe it is usefull.

[ATTACH]n441330[/ATTACH]

[kt315]

Hi,

I found the following to Mr. Bill modifications. Maybe it is usefull.

[ATTACH]n441330[/ATTACH]

Mr. Bill Crafttree had huge list of mods of different detectors. it all was on his site, with prices. When i told mods i did see in IDX, i got in repair, in the forum, mr. Bill went and opened new topic - with his mods. more than this he did not share. such story you have to know.
my IDX board was not with his mods, but who did i do not know.

[Nightryder]

thanks Nightryder for that idea. do you have any photos of when you did that mod......

I don't but I can take a photo for you when I get home later this week. it's a little tight fit since R7 on the PCB was designed for a 1/4 watt resistor. cheers

[keith777]

I don't but I can take a photo for you when I get home later this week. it's a little tight fit since R7 on the PCB was designed for a 1/4 watt resistor. cheers

yes please. i would very much appreciate that if you could...............

[Nightryder]

yes please. i would very much appreciate that if you could...............

In case you are wondering, The DIY version of the IDX, which I'm using, has the same resistors numbering on the original. Also, mine is heavily Modified such that it has 2 tones and VDI and that explains the wirings

[keith777]

Nice.....yes, it looks like a lot of careful work has been done to the board.

[keith777]

i forgot to show the machine fully finished with labels next to the new controls.......

[growdude]

Where can I get an idx pro kit to build with vdi and 2 tones