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Treasure Hunting & Metal Detecting Forum Message Boards - Detector Hunter Whites Minelab Tesoro XP > Tech Talk > Modifications, Do It Yourself & Repairs (Moderators: Eugene52, xavier, GoldDigger1950) >

XR71 Operation Help

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Wilson

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Delta Pulse stage assemply

	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #450 on: October 22, 2010, 12:03:19 pm »

Hello Ram, I would like to know about the changes in Delta Pulse 2 what you said!
Thanks

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ram

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	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #451 on: October 23, 2010, 05:42:39 pm »

hello wilson, just study the delta pulse schematic transmitter and receiver stage. now if you want the dp more powerful modify the transmitter but you must modify also the suppressor stage to reciver. in transmitter modification beware of flyback voltage it should be suppressed or the circuit will got damage.

regards, ram,

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Wilson

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Delta Pulse stage assemply

	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #452 on: October 24, 2010, 10:18:42 am »

Tradu??o do portugu?s para ingl?s

Hello Ram, you could post the schema of this modification or send to my email? Great

Thanks. Wilson

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danny475

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	pleas help « Reply #453 on: October 26, 2010, 09:27:58 am »

hi all i wont a help pleas
i have made the dp and it works fine but without deepth i made a 1*1m coil of 16 turns and 0.5mm wire but it hase a poor detection although when i use the 40cm coil i cant detect a coin never i dont know why ?
than i realize that there are 3 or more scamatics and 3 printabale bords so i dont know which one is the best for grate geep detection some of them use lt062 and some of them lt 072 and ,and some of them use 2n and some use bc transistors? Huh?

??
so please if any one knows the best data for dp of good depth pleas say to me
i'm sorry for my english .....

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japanese

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GARY PI

	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #454 on: October 26, 2010, 10:05:23 am »

Hi danny475
all pcb dp as same.and tested.the error from componenet.
The good detection from: 1-you must use (lf357-356- tl071 ). 2-The coil 1x1m 16turn 0.5mm at f=100 hz or 120 hz,R5=>1k/1w.
3-The coil 40cm 23turn 0.5mm at f=300~400 hz R5=680 ohm/1w.
4-you must use (tl062-072,CD4538-CD14538,CD4066).
5-All cap. nano you use MK,MYLAR. For pico use ciramic c13,c17.
6-ALL TR 557 USE BC557C ,ALL TR 546 USE BC546B .
7-r23,24,25,26 =4.7k tolerance 0.1% exact value.
best time
j.

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danny475

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	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #455 on: October 26, 2010, 11:01:58 am »

hi japanese
thank you realy for your care
what you mean by f=100hz or 120hz how can i get that valeu ?
i use lf 357
and for r5 i use 680ohm/1w, i will change it
and for the coil i made it as you sad but i see some or the members use adsl cabel is this ok more than the coper coil
and i use tl062cp is tis good if it is not i will change it also ?
for the capacitors i used as you sad all of them mk excapt 2 of them which were mentioned by pico i used seramic disc
and for the transistors i used as you sed bc557 and bc546 i dont know if the later after the number makes change ?
and i dont use for the 4 resistors 1.0% tolarance becouse i dont found them so tomorow i will serch again
thanks to you
danny

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japanese

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GARY PI

	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #456 on: October 26, 2010, 12:38:21 pm »

Hi danny475
f=100~120hz you get from PR1 adj. at Middle .
BC557C,BC546B ,the c , b is the Amplification .
the 4 resistors 1.0% tolarance must be.if you not found 4.7 you can
ad two resistors =4.7k
your coil is good.
best time
j.

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danny475

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	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #457 on: October 26, 2010, 12:44:46 pm »

thank you i will do what you sad and i will repost the result
thanks to u Clapp

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ram

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	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #458 on: October 27, 2010, 08:18:36 pm »

hello wilson, try to search in this forum i've posted schematic i used as well the pcb. all those schematic and pcb were from eugene52.

regards, ram

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danny475

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	Re: DELTA PULSE / SNIFFER XR71 PULSE INDUCTION METAL DETECTOR « Reply #459 on: October 28, 2010, 10:04:56 am »

hi all
i see the turkish dp project vidios in utube they were very nice but i dont know if they differ from the one that it is in this forem ?
it has a grate depth i dont know if any one see the vidios ?
thank you all

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