Whites Classic, II, III, ID, and IDX Modifications

[chevesne]

R7 is 100 ohm on your board.

We can't see the color bands on R24 & R32, you have to take new picture.

[keith777]

Hi again guys.
thanks a lot Dutchie for that link. much appreciated....

please could anyone tell me if i have these resistors correct for the one's to change in the instructions.
thanks in advance guys.

[Dutchie]

R7 is 100 ohm 5%.
check this link for an easy tool : http://www.talkingelectronics.com/Fr...alculator.html

[keith777]

Hi guys.
i own a White's Classic SL and would like to do MR Bills Mod to it. i am useless when it comes to what resister value is what etc. i have dyslexia. i was looking at the instructions at the beginning of this thread and was wondering about a few things........

(1) Replace resistor R24 with a 2.2 Meg. You could have either a 470k or a 1.5 Meg there depending on when the unit was manufactured.
i am not sure what those resisters values mean.
my machine has 1998 under the battery flap.

(2) Check resistor R7. If it’s not a 51 ohm resistor, replace it with one of that value. It’s most likely a 100 ohm from factory. Later manufactured units had 51 ohms.
how do i know if the R7 resistor on my board is 51 ohm one or not.

(3)same goes for the R32 SAT replacement. what resistor values do i need.

my soldering skills are ok. i have done a fare bit of solder to this and that in the past. i have modified a minlab explorer before on to a straight shaft. but as i say resisters etc are just not my thing.
if anyone could be as so kind as to show me/point me in the right direction as to the components that i need it would be so much appreciated.

i have taken some photos of the board.

many thanks in advance.

[treasurehunterforlife]

Hello everyone. This is my first time posting. So iam working on what I call a frekienst detector. I'am using a whites classic SL one knob style detector as my platform.
My question is
1. What wattage potentiometer would I use, I noticed there is different wattages. Half watt and up.
2. I know the values of the threshold and ground balance knobs. However what would be the value for a sensitivity knob for this machine. 10k , 50k or 100k potentiometer ?
3. Since this version detector I have uses the 6b coils , the coil is not interchangeable, it is hardwired. I would like to add the female part that connects to the box and wire the cable with the male connector so I can use my other 6b coils.
I know it's alot of questions but any help would be greatly appreciated. Thanks
Jeremiah

[Waka]

hi, can someone tell me if these mods are applicable to this pcb?

[SVEN1]

By adding Threshold, GB and adjustable SAT. You will find they interact with each other. Mega you'll get used to it, kind of like your PI.
Guess that's why the IDX is mass produced without those controls, might confuse too many people.
With the 5.3 my IDX my threshold remains very stable in all metal mode.
My 9.5 coil, have to fix the coil cable at the coil fitting, damaged cable jacket, falses.
Air tests using both coils was impressive but, not overly excited about it. If it goes almost as deep in the ground or close to it, it will suit many of my hunting needs.
With Mr. Bill's mods it does make the detector more versatile. How much depth improvement the mods made, don't know, as my IDX was a basket case when I got it
so I didn't try hunting with it. have to say the way it is set up no, operation kind of reminds me of an older White's detector.

If there was a 2 or 3 tone mod, would make a really nice detector.

http://forum.treasureclassifieds.com/Thread-a-shipwreck-of-a-detector

[Koala]

@Koala,many thanks for the reply,the new smaller 5.3 coil should be here early next week,must admit the IDX Pro although a basic machine to look at,it performs very well on trashy sites and the depth with the 950 coil is reasonably good as well.

Yes preforms well in the trash. To get depth on small objects on edge you need to run the machine with very little discrimination. Most iron then breaks through but if you use good quality headphones you can hear a tone difference.


To give you an example if you run enough discrimination to run silent then a cut half penny on edge will be almost undetectable.


I built one from the plans on here and used it as my only detector for over a year. Only going out a couple of times a month. There a lot of feedback from the tones. Volume, sharpness and quality of the rise and fall and is it consistent left to right and front to back sweeps. After a fair bit of time I was thinking that sounds like a deep coin or sounds like aluminium trash. Correct most of the time.

[Mega B]

@Koala,many thanks for the reply,the new smaller 5.3 coil should be here early next week,must admit the IDX Pro although a basic machine to look at,it performs very well on trashy sites and the depth with the 950 coil is reasonably good as well.

[Koala]

Fairly sure the small coil will work fine without any adjustment. Small coils are more tolerant to the ground balance being slightly out. There is also a good chance the coil will be a close match anyhow and not need any adjustment.

[Mega B]

Require some help regarding the IDX upgrades,i have a mint condition Pro version,does anyone supply all the upgrade parts in a complete kit of some kind,the IDX has the 950 coil and a new 5.3 one being shipped over from the US to the UK.In theory a manual GB would be best to 'match' these coils perfectly but is it essential or could i get away with it ??

Sven from Canada has kindly sent me all the pdf files to carry out the job and also the components used,but must admit its plucking the courage up to switch the soldering iron on and cutting various wires etc,i can wire a 3 pin mains plug but a electronics whizz kid i ain't.If its a easy then i may do it,but i still dont feel 100% confident in doing it.

[IDXKevin]

Thanks Koala! My memory was a bit fuzzy on that one,a constant full blast TH would NOT be my idea of a fun machine to use...

[Koala]

Threshold has three wires. Middle one from the board must go the middle on the external. The other two do not matter if they are the wrong way round it will just work backwards.

[vpoirier79]

ok I will try later today

[IDXKevin]

I don't recall if the trimmer on the board had 2 or 3 wires,but there should only be two going to your external pot,look at the board traces carefully...