GC 1023

[dbanner]

Greetings to everyone. New to forum. I want to build the GC 1023. Searched for schematic with no luck. I only have pics of PCB from this forum. Does anyone have a schematic of this detector? Top side foil is obscured by components so it is difficult to reverse engineer schematic. I suspect it might be a clone but not able to match it to any schematic. Any ideas would be appreciated.

[sinclairuser]

no offence but why?, its a 3rd rate copy of 2nd rate 70,s tech.
not trying to be rude but if ever there was a detector not worth the time and effort its that.

[SVEN1]

You can buy them cheaper than you can make one for. I would choose a different project.

[kt315]

dbaner, can you write what chips you see at the board? part list?

[SVEN1]

GC1025 http://metaldetector.forumfree.it/?t=55636392

GC1023 http://www.treasurenet.com/forums/ot...tectors-2.html

[kt315]

i have a digest of good pics of the board... do not see some ICs mark under a glue...

[dbanner]

The chips are as follows: 3 TL064's, 1 LM339(that's the one obscured by glue), 1 CD4053 and1 LM339. This detector has a tone discrimination notch mode whereby everything to the left of where u set the disc control gives low tone, and everything to the right gives high tone. This is a nice feature. It has the same functionality as tracker 4 but the chips used are different Hence circuit is different. The detection depth is purported to be good, and they are no longer dirt cheap. The price is closer to $200 plus shipping. I happen to have a spair discovery 2 coil that would be perfect fit since it operation at 6.6khz or thereabouts.

[kt315]

in DIP-8 probably is not LM339? i see 393 there above of pcb. give pls numeration of the chips marking, for example -
U2 - LM339, U3 - TL064 etc.

please be more due to electronics general rules if you give the information.

[kt315]

BOM wiki

A bill of materials or product structure (sometimes bill of material, BOM or associated list) is a list of the raw materials, sub-assemblies, intermediate assemblies, sub-components, parts and the quantities of each needed to manufacture an end product. A BOM may be used for communication between manufacturing partners, or confined to a single manufacturing plant. A bill of materials is often tied to a production order whose issuance may generate reservations for components in the bill of materials that are in stock and requisitions for components that are not in stock.
A BOM can define products as they are designed (engineering bill of materials), as they are ordered (sales bill of materials), as they are built (manufacturing bill of materials), or as they are maintained (service bill of materials or pseudo bill of material). The different types of BOMs depend on the business need and use for which they are intended. In process industries, the BOM is also known as the formula, recipe, or ingredients list. The phrase "bill of material" (or BOM) is frequently used by engineers as an adjective to refer not to the literal bill, but to the current production configuration of a product, to distinguish it from modified or improved versions under study or in test.
In electronics, the BOM represents the list of components used on the printed wiring board or printed circuit board. Once the design of the circuit is completed, the BOM list is passed on to the PCB layout engineer as well as component engineer who will procure the components required for the design

[dbanner]

OK. U1,U4,U6-TL064, U2-LM393, U5-LM339. These are from through hole board. Then there is U7 which I saw somewhere listed as TL431.

[dbanner]

U5 cannot be LM393 since this is an 8 pin DIP. It is LM339 which is a 14 pin IC. I have a picture of PCB from this forum with glue removed. It shows U5 as LM339. Anyway, I like building vintage MD circuits. I learn a lot while improving my skills. Right now I am building delta pulse(single side PCB), and a whites 6000/d series 2 on strip board. I have also completed 5 other detectors. So you see I'm relatively new to this as compared to others, but you have to start somewhere. Can't seem to figure out how to upload pictures.

[SVEN1]

Nigel in the Uk has been playing with his 1023. And it does have some fine qualities, in that respect I can see why you would like to build one and maybe try and improve it.
I will post Nigel's Youtube link so you can take a look.
https://www.youtube.com/user/sftatat...?query=gc-1023

[kt315]

upload pics. click REPLY then GO ADVANCED you see below. find ATTACHMENTS above.

ADD FILES INSERT INLINE DONE

[Bill512]

Greetings to everyone. New to forum. I want to build the GC 1023. Searched for schematic with no luck. I only have pics of PCB from this forum. Does anyone have a schematic of this detector? Top side foil is obscured by components so it is difficult to reverse engineer schematic. I suspect it might be a clone but not able to match it to any schematic. Any ideas would be appreciated.

It's a (simplified) Fisher copy - best match: 1235

[kt315]

Greetings to everyone. New to forum. I want to build the GC 1023. Searched for schematic with no luck. I only have pics of PCB from this forum. Does anyone have a schematic of this detector? Top side foil is obscured by components so it is difficult to reverse engineer schematic. I suspect it might be a clone but not able to match it to any schematic. Any ideas would be appreciated.

upload pics. click REPLY then GO ADVANCED you see below. find ATTACHMENTS above.

ADD FILES INSERT INLINE DONE