Please , schematic information for cscope cs2m

[dbanner]

Is there ground balance trimmer on pcb?

[dbanner]

If you look at cs2mx schematic, you will see Rx coil tuned with .047uF(47nF) capacitor. Using 1.9mH for Rx coil you measured gives resonant frequency with 47nf cap of 16.84KHZ(operating freq.). In order for fisher coil Rx(2.4mH) to resonate at 16.84KHZ, you will need 37nF cap( use nearest value which is 33nF). I dont know the operating frequency of cs2m, but you can use same way to work out value of Rx capaitor. As for tX coil, your fisher tx is not centre-tap,so you are screwed I think, since this is hartley oscillator which need coil with centre tap. you may have to modify tx oscillator to colpitts. Maybe someone with more knowledge can ring in.

[kt315]

Sorry for the late response , I'm from Bulgaria , 12h. time zone difference

https://jpegbay.com/gallery/006698822-.html#1

https://jpegbay.com/gallery/006698826-.html#1

https://jpegbay.com/gallery/006698828-.html#1

https://jpegbay.com/gallery/006698830-.html#1

dbanner , your schematics (#3) cs2mx - does not comply with this metal detector
Thank you all, one more time

please look my opus BEFORE to do the pics http://www.geotech1.com/forums/showt...here-share-out

[SEMPRON]

I have compatible DD coil original fisher - 2.2mH , 8 Ω /2.4mH ,14Ω - NO capacitors inside coil housing
Original coil cscope cs2m - 1.9mH , 7.8 Ω / 1.9mH , 11Ω
Original coil - transmitter has a middle inductive point - 3 inferences
dd coil - transmitter - 2 inferences
Тhis metal detector model has , three-point generator circuit
I want to activate dd coil - which is a two point
Generator works on a two-point circuit - I activated generator
Problem is in phase-shifting step !!!!!!!!!!!!!!!!
Please , help my , schematic

[dbanner]

Are you going to make a DD coil or you trying to buy a compatible DD coil? Making one would be very easy for this detector. You need to download user manual and look to see operating frequency. From this you can determine coil to make. Try to measure inductances of your cs2 coil. Try to determine if there are capacitors inside coil housing. This is easy to deduce. Look on pcb for tuning caps on front end of circuit leading to coil connecter. If you find any, note value and use resonance calculator to find inductance of Tx coil. Do adavanced search on this site for any info on scope coils. Just some tips. Maybe someone else can advise on DD coil replacement.

[SEMPRON]

Yes working.
I want to put dd coil . Оriginal coil /20 cm = 7.9 in/ very shallow depth.

https://jpegbay.com/gallery/006699602-.html#1

[dbanner]

Sempron, thanks for pics, is the detector working? Looks like simple circuit to troubleshoot.

[kt315]

PLEEEEESSEEEE DRYYYYY A BOARD BYYYY ALCOHOLLLLLLLL BEFOREEEEE TO DOOOOO THEEEEEE PIIIICSSSSS

[SEMPRON]

Sorry for the late response , I'm from Bulgaria , 12h. time zone difference

https://jpegbay.com/gallery/006698822-.html#1

https://jpegbay.com/gallery/006698826-.html#1

https://jpegbay.com/gallery/006698828-.html#1

https://jpegbay.com/gallery/006698830-.html#1

dbanner , your schematics (#3) cs2mx - does not comply with this metal detector
Thank you all, one more time

[dbanner]

I understand, one has to give something to get something. Sorry for stepping on your toes. In future i will be more careful.

[kt315]

DB
i had got very good lessons when i gave schematics to everybody. noone did send me the pics in reply.
so i always ask first, receive then send. just cause thats exchange.

the example. one american asked manual on Baracuda in a forum. ok. i sent it on his email.
still no reply and only promise. i asked pics of board, NOT the schematic or layout or part list.
HE HAD RUN OUT.

[dbanner]

Sorry about that, It will not happen again.

[kt315]

yup yup ))) now he can run out. he got it! LOL))))))))

[dbanner]

Please post pics here of top and bottom pcb if you can.

[dbanner]

cs2mx