Delta Pulse

[Nicolas]

Mohandes, when will you learn to use the search engine on the Internet?
http://pdf1.alldatasheet.com/datashe...STTH1210D.html
http://web.mit.edu/6.301/www/LF155.pdf

Look it Mohandes you can search for every component datasheet

http://www.qariya.com/electronics/datasheet.htm

http://www.alldatasheet.com

[mohandes]

Look it Mohandes you can search for every component datasheet

http://www.qariya.com/electronics/datasheet.htm

http://www.alldatasheet.com

thanks nicolas
i search in google
do you listen Quran ??? if you want i can upload it for you ( by Mr Ghalvash is Egypt READER )
regards

[Attilawap]

Hy!
Could you tell me everbody what is a function these potmeters?
Regards

[Nicolas]

Hy!
Could you tell me everbody what is a function these potmeters?
Regards

[ATTACH]27352[/ATTACH]

Hi look this video you can understanding

They are for the calibration and discrimination. Value 10k

http://www.youtube.com/watch?v=RGocN4qcjBQ

[mohandes]

dear Kt315
sorry me man , i can not find stth1210d , so i need to equivalent ( if you dont angry )
regards

[porkluvr]

Any 600V (or higher) FR (Fast Recovery) diode should work ok. (For long life, diode must be rated for at least 3~5 amps?)

You could probably remove the diode altogether and not notice much difference.

One possible consequence is that your optimum damping resistance might be lower without the diode than with it. That is not good, but it's not the end of the world.

[g.s]

What is your opinion a driver for mosfet.
look what i found tc427..

perhaps this is an improvement ,what is YOUR OPINION ?

[porkluvr]

Nothing would be gained with a driver. The LM556 has plenty of drive capability and is fast enough.

[kt315]

Porkluvr is absoliutely right. please improvement anything beside DP you see around - TGSL and Super TGSL With H Bridge TX Diff RX Quad Sampling.

not DP.

[6666]

sorry me man , i can not find stth1210d

You can find them on fleabay.

[mohandes]

thanks
i find these :
BYT 12P
BYT 87
ALSO :
STTH12R06D ( just 600v )
i want use byt 12p
regards

[mohandes]

SECOND DELTA PULSE2

hi all gurus
i success to make first dp2 ( my pcb from turkey site ) and work very well, then i make another and check all but the sounds part not work,
the timing is ok(4538s)i can see the CHANGE of the T(Period) when return the signal pot and 500k pot , pps and pw is ok i have 600to 650 volt p-p by irf840.
and have lf357-6.
in ref voltage i have 6.7volts
and when i set voice in manual and return the Tune pot D7A-1 ,D7A-7 not change in voltage(have a fixed voltage ) ,and this is my problem
all thing is ok so where is wrong ??the first dp2 work but this is not.
regards
i check all and i can not find error so i need your help.

[porkluvr]

A couple of posts back, I had not considered that IRF840 might be used. I only considered IRF740 when I said 600V diode or better was OK.

Mohandes, the IRF840 data sheet suggests that it zeners at 500V but you are saying you have >600V (greater than 600V) on the flyback. In that case you would better use an FR diode rated for >800V (if you install the FR diode at all).

[mohandes]

A couple of posts back, I had not considered that IRF840 might be used. I only considered IRF740 when I said 600V diode or better was OK.

Mohandes, the IRF840 data sheet suggests that it zeners at 500V but you are saying you have >600V (greater than 600V) on the flyback. In that case you would better use an FR diode rated for >800V (if you install the FR diode at all).

hi my teacher and my old friend
but my first dp2 i make by irf840 so i think my problem in D7A-1 ,D7A-7.
please tell me set point for find the error.all is ok just i have not change in above IC.
if tell me what value i should have in set points more better.
regards

[porkluvr]

hi my teacher and my old friend
but my first dp2 i make by irf840 so i think my problem in D7A-1 ,D7A-7.
please tell me set point for find the error.all is ok just i have not change in above IC.
if tell me what value i should have in set points more better.
regards

WHY don't you get the one that works and the one that doesn't work, place them side-by side, and then sort out the differences with an oscilloscope?
I mean, come on man. Use your brain.