Modifying detectors

[Frank]

Hello to all;


I'm new to MD'ing but I've been an electronics tech. for about 30 years, and a HAM radio operator. I was ondering if anyone here is into modifying their equipment? As an example, changing the auto. ground track on the D-3000 sold by Radio Shack so it's adjustable. Like I said I'm new to MD'ing but almost everything electronic can be modifyed or fine tuned.


I'd be interested in any mod's that are out there.


Frank

[Carl]

Re: Modifying detectors

>Hello to all;


>I'm new to MD'ing but I've been an electronics tech. for about 30 years, and a HAM radio operator. I was ondering if anyone here is into modifying their equipment? As an example, changing the auto. ground track on the D-3000 sold by Radio Shack so it's adjustable. Like I said I'm new to MD'ing but almost everything electronic can be modifyed or fine tuned.


>I'd be interested in any mod's that are out there.


> Frank


Jim mentions in a post below that a German fellow has modified a Fisher and I've heard similar stories elsewhere. Like you, I would like to hear from others that are doing this sort of stuff. Personally, I would not have the guts to take a new machine and try any mods, but I am working on a couple of older analog detectors. If you make any mods to your D-3000 write up a description and I will add it to the MD section.


- Carl

[Frank]

Re: Modifying detectors

Hello Carl;


The mod I'm thinking of right now is the one I mentioned in my first post. I would really like to add manual ground track to my D-3000. I've had it apart and looked at the circuit, everything in it is


all common parts, and it's not surface mount stuff, so that opens modifying up to a lot more people. Reverse enegineering is very time comsuming. I'd like to buy a dead LandStar to get a look at that circuit.


Yes I will share anything I run across with the group


Frank

[Eric Foster]

Re: Modifying detectors

Hi All,


Pulse induction metal detectors are relatively easy to modify and experiment with as they have no tuned circuits. Coil shapes, number of turns, wire gauge, screening etc can all be readily changed as, generally, one coil is used for both transmit and receive. Transmitter pulse width, amplitude and pulse rate are all easily changed by one with a knowledge of electronics. In the recent past I have posted on my forum details of some simple modifications to a Whites Surfmaster PI which entails only changing the power transistor in the transmitter and the coil damping resistor. A useful increase in range and greater sensitivity to small rings results from this mod. No test equipment is needed but the trickest bit is unsoldering the original parts without damaging the tracks on the double sided pcb. Again, no problem for the electronics guy with the right tools.


Eric.

[Carl]

Re: Modifying detectors

>Reverse enegineering is very time comsuming.


Yes, I reverse engineered a Bounty Hunter Red Baron, took quite a while and that was a single-sided PC board.


>I'd like to buy a dead LandStar to get a look at that circuit.


Keep an eye on eBay, I got the Red Baron for $20. Also, you might be able to order the schematic; for example, White's will sell the schematic for an older unit for $25. Radio Shack is usually pretty good about this.


- Carl

[Carl]

Re: Modifying detectors

Thanks for the input, Eric. I look forward to working on a PI design, but probably not until late summer.


- Carl

[Frank]

Re: Modifying detectors

Hello Carl;


Like I said in my first post I'm only a couple of months old in MD'ing years. Some how I got the idea that PI type detectors were for under water,


the post from Eric really caught my attention. I need to find out more about PI units.




[i]>Keep an eye on eBay, I got the Red Baron for $20.


I've seen a few references to eBAY in posts in forums


I take it it is some kind of discount house ?


>Radio Shack is usually pretty good about this.


Yes I've had very good luck with Tandy and their service manuals are very good.


Well it's after midnight, I just got home from work. (I work swing shift) Actually it's not bad, I have a few hours to play in my shop almost every night, and at that time of night every thing is real peaceful.


You take care.


Frank

[Carl]

Re: PI detectors

>Hello Carl;


> Like I said in my first post I'm only a couple of months old in MD'ing years. Some how I got the idea that PI type detectors were for under water, the post from Eric really caught my attention. I need to find out more about PI units.


PI units are most popular for beach and water, esp. salt water, because they are much better at dealing with the salt environment. They can easily be used as a general purpose land detector, but the drawback is they do not have discrimination capability.


- Carl

[Unregistered]

Hello to all;


I'm new to MD'ing but I've been an electronics tech. for about 30 years, and a HAM radio operator. I was ondering if anyone here is into modifying their equipment? As an example, changing the auto. ground track on the D-3000 sold by Radio Shack so it's adjustable. Like I said I'm new to MD'ing but almost everything electronic can be modifyed or fine tuned.


I'd be interested in any mod's that are out there.


Frank

What's your call sign, Frank?

Wayne, W1KI/4
Ocala, Florida

[Wirechief]

Hi fellas! I could use an SMT rework station so I can play around with some of the new detectors. Keep us posted guys on any mods you come up with. Nice to meet you all and hello Carl been awhile since I talked to you, I hope you are doing ok. Everyone have fun and metal detecting is great! de John the Wirechief, KA5QYR, CET.

[Ed in SoDak]

My Tiime Ranger has a PIC microcontroller. So all you need do is port out the eprom, figure out their code, rewrite it to suit the existing front panel and burn a new 'prom. Easy!
For some, that is!

-Ed

[reza_1810]

help me

hello
every body
i want gti 2500 schematic
please send it for me


thanks