Delta Pulse

[Jose]

You need to connect the reset button between 13 and 14 of 4066.
2.7 ohms is fine.
Decrease the TX pulse width.
Increase the delay (delay). It has to be silenced

[kt315]

you need to set THRESHOLD in middle position and by RESET knob fully decrease the sound to silent.

[Ajay0707]

what PCB you mean? there are amount of PCB diagrams on DP... have you Sprint Layout 5 installed on your computer?

Hi KT315,

Great to see your reply for my message. I am attaching the image of the the PCB that I am talking about. Sorry I don't have Sprint Layout 5 installed on my machine.

-Ajay0707

[bernte_one]

many thanks jose and kt315

[Ajay0707]

If i remember the dimensions of one sided pcb is 17,5 X 9 (or 9,5cm)
Regards

Thank you Detecto..

-Ajay0707

[kt315]

Hi KT315,

Great to see your reply for my message. I am attaching the image of the the PCB that I am talking about. Sorry I don't have Sprint Layout 5 installed on my machine.

-Ajay0707

I wrote it needs to be installed... I was not right. Sprint Layout is simplest CAD program you can find around and does not need to be installed.

take it here http://depositfiles.com/files/w7lwiudab

at first, you have to convert the file JPG in BMP by any graphic editor that you use in your computer. I have did it in stead you now... you will find the BMP in ZIP...

[bernte_one]

you need to set THRESHOLD in middle position and by RESET knob fully decrease the sound to silent.

hello kt315

it works only half when turn threshold to middleposition and then activate tune button i can only reduce threshold a bit but not enough (but right potoentiometer installed)
irf740 get hot very quick
did you have an idea
or anyone else

[porkluvr]

hello kt315

it works only half when turn threshold to middleposition and then activate tune button i can only reduce threshold a bit but not enough (but right potoentiometer installed)
irf740 get hot very quick
did you have an idea
or anyone else

\

There might be some other problems too, but A-A and B-B should be jumpered.

[kt315]

but A-A and B-B should be jumpered.

new one has all changes so you can see these connections and also mods.

[bernte_one]

thanks

jumpers - thats what i asked before but i thought that were only test points

ok i will set jumpers there

regards bernd

[dimovnis]

sniffer xr71

I did Sniffer XR 71 BUT NOT doing something good.sound works really be heard, TX power ok. trshold ok.volume ok, but the coil does not work does not react to metal.veliki pozrav from Serbia

[rajesh]

delta pluse

I did Sniffer XR 71 BUT NOT doing something good.sound works really be heard, TX power ok. trshold ok.volume ok, but the coil does not work does not react to metal.veliki pozrav from Serbia

hi just you set your multi meter in milli volt setting then check le 357 out put pin no. 6 to 0 volt ground if you have some voltage improve .......rajesh

[szucs_g]

Please read through the forum. Everything is answered. I've succeeded. The head of my 450 uH, 2.9 Ohm. I'm using IRF840. A + E, - E measurement points to work. Easy to break down the diodes. Listen to this. Solder in the first two, which is 062 to go out and measure them. For me, one is broken and it was not good for metal detectors.

But first, be patient. I went to him three months (without the oscilloscope). :-)
I understand now works.

Happy New Year!

Gabor
the Carpathian Basin

[dimovnis]

sniffer xr71

Happy new year.It 's my delta sniffer. What could be with her.THANKS THANKS THANKS

[szucs_g]

This is my DP. It' working! Coil: 450 uH, 2,9 Ohm. Paralel resistor: 1,2 K. IRF 840.

http://www.hobbielektronika.hu/forum...c03f9030d9.jpg