Pulse IB discriminator (by Sasho - Varna)

[Geo]

IN ENGLISH!!!!!!!!!!!!!!!!!!!!!!
NOT IN BLABISH>>>>>>>>>>>>>>>>>>>>>>>

You see that i am registering and i am from Greece so the language is the Greek
Who are you Unregister ..... BLABISH??????

[Max]

Hi Max . As i said before i will give it a try after two months and i"ll write the results of comparison with SS60.
Can you attach here the final pcb .............. i have not time for searching... sorry.
Regards

Hi Geo,
I've used 1st PCB from the original dutch project, you can find zipfile on page 1 of GoldenSabre thread.

PCB layer is correct , no mistakes.

There are few differences between labels on PCB drawing and schematic, but if you build it following PCB parts labels your detector will work.

I found that only big difference that could be important is one capacitor on preamp. LF353 that in label is 5pF and in schematic is 10pF.

All the rest you could leave as in the PCB labels.

You could build also GSabre light, without notch filter... smaller PCB.

Best regards,
Max

PS: I attach the original zipfile here

[Geo]

Hi Max . Thanks for the files. The capacitor must be 5 or 10pF???
Regards

[Max]

Hi Max . Thanks for the files. The capacitor must be 5 or 10pF???
Regards

Hi Geo,
I'm sure it's 10pF on original GSabre... also in schematic it's 10pF.
I think the little mistake was on PCB's label only.

Anyway, it works also (and good) with 5pF there.

Kind regards,
Max

[Unregistered]

Is there any differance in performance with 5pf and with 10pf?
Or you haven't tryed yet?

[Unregistered]

CA3140 replace? Sasho IB-PI

Can you tell me can I change CA3140 whit something?
Because I cant find it!
LF357 - LF356 is OK ?

best reguards

[Qiaozhi]

Can you tell me can I change CA3140 whit something?
Because I cant find it!
LF357 - LF356 is OK ?

best reguards

Try here ->
http://www.maplin.co.uk/Module.aspx?...=2920&doy=16m9
If not, then the CA3140 is a direct replacement for the common 741, so anything with the same pinout will work.

[Max]

Can you tell me can I change CA3140 whit something?
Because I cant find it!
LF357 - LF356 is OK ?

best reguards

CA3130 ?

[Unregistered]

test

For Qiaozhi
I have tested the 741 but it does not work well !!??
With LF356 1 euro to 7cm, not much sensitive one!

For Max
I have not tried CA3130...

Thanks

[Qiaozhi]

For Qiaozhi
I have tested the 741 but it does not work well !!??
With LF356 1 euro to 7cm, not much sensitive one!

For Max
I have not tried CA3130...

Thanks

How about LF351? This is also pin compatible.

[Unregistered]

Good LF356

Problem in my PCB !!!!!

I have replace :
NE5534 ->LF357
CA3140 ->LF356
...... a work well !!!

Very good project.

Thanks - ciao

[Qiaozhi]

Problem in my PCB !!!!!

I have replace :
NE5534 ->LF357
CA3140 ->LF356
...... a work well !!!

Very good project.

Thanks - ciao

OK - very good!
Now go and have some fun detecting in the field.

[dantech]

Hi,
LF356 and LF357 are very similar. They differ in bandwidth and speed only. Mensioned issues are not important for us. LF356 is much cheaper than LF357 of course.

[Unregistered]

Thanks, Qiaozhi

Dantech .... LF356 is more available.

[dantech]

Okay. LF356 is much cheaper and available in Poland also. Bandwidth is completly not important for us (5MHz or 20MHz). So, there is no common sense to buy LF357. He can replace all opamps by LF356 in his detector