Delta Pulse

[tuxnor]

thinking, but not so clearly, you can find an analog of the diode, Ultrafast Recovery I look in datasheet, in any CRT oldie type PC monitors. I need to take a time-out for deep learning of this matter.

OK ...Thanks KT315 .
i am clean now hearing that ,,i have thrown home in norway,,1000+ crt´s
use to have a computer and gameconsole shop with service,chipping,soldering,etc..

but where is placement of this diode..is it over 10.000 cab where there is used a 1n4001 now on last schema ?
Anyone have "the old" schema where STTH is mentioend
and is it only on 2 sides pcb where it was used ??

1n4937 is faaast

I can get my hands a STTH diode without problem and would like to use it as suggested ..sorry for beeing stubborn,but is it best for deltapulse curcit
then i would like to use it..

[porkluvr]

what is all this about STTH1210D and 3 x 4700uf caps on some forums?? i cant find where it shall be on any deltapulse component overlay either on any schema i have untill now..

Ken jørgensen
Rossfjord avel

Golly. Nothing like being SPECIFIC. "Some forums"?

What forums??

[tuxnor]

Golly. Nothing like being SPECIFIC. "Some forums"?

What forums??

Maaan .sorry for unconsisient fierematches..
Found at Thehunthing and on some googling where other ask about it..
i tryed to get a answear on thehunthing where eugne is most
but without any luck
I have ordred all components after this list..before i study schema and pcblay

Delta Pulse parts list re-written by Eugene 11-19-09

C1 22nF
C2 1nF
C3 10nF ok ny og brukt
C4 1.5nF
C5 1.5nF
C6 1.5nF
C7 1000µF electrolytic ok 1
C8 10µF
C9 100nF Polyester film***** bestill
C10 100nF
C11 100nF
C12 100µF
C13 15pF ok bestilt 3
C14 100nF
C15 100nF
C16 100nF
C17 47pF
C18 100nF
C19 100nF
C20 100nF
C21 10µF ok 10+++
C22 100nF
C23 100nF
C24 100nF
C25 220nF
C26 47nF
C27 220µF ok 2
C28 100nF
C29 100µF ok 10++ ny
C30 4700uF
C31 4700uF
C32 4700uF

D1 LM556 ok fra kina
D2 4538 ok bestilt 2 stk
D3 4538 ok 2 stk
D4 LF357 ok fra kina
D5 TL062 ok bestilt
D6 TL062
D7 TL062
D8 NE555 ok
D9 4066 ok bestilt
D10 4066 ok bestilt

PR1 250k
P1 50k
P2 500k
P3 20k
P4 20k
P5 10k
P6 10k

R1 470k
R4 5k6
R5 680 1 Watt
R7 15k
R8 27k
R9 68k
R10 100k
R11 100k
R15 820
R17 120k
R18 120k
R28 56k
R31 5k6
R32 330
R34 22k
R35 5k6
R36 56k
R37 560
R42 22k
R44 330
R48 8k2
R50 1 Ohm 0.25 Watt

R2 6k8 ok 3stk
R3 47k ok 50
R21 47k ok 50
R22 47k ok50
R33 4k7 ok 50 stk
R49 1k ok 50 stk
R45 39 ok 5 stk 0.6w+ 2 stk problå 1%
R46 2,2 ok 5stk**************************
R40 12k ok 50 stk
R41 6k8 ok 5stk
R23 4k7 use 1% precision ok 50 stk
R24 4k7 use 1% precision ok 50
R25 4k7 use 1% precision ok 50
R26 4k7 use 1% precision ok 50
R27 4k7 ok 50 stk
R29 1M ok 50 stk
R30 1M ok 50 stk
R6 1k ok 50 stk
R16 12k ok 50 stk
R12 10k ok 5stk
R13 10k ok 5 stk
R38 10k ok 5 stk
R14 1k ok 50 stk
R47 1k ok 50 stk
R39 1k ok 50 stk
R19 4k7 ok 50 stk
R20 2k2ok 50 stk
' R43 6k8 ok 5 stk***************¨'

T1 IRF740 ok alle tr
T2 BC546 ok alle
T3 BC557 ok alle
T4 BC546
T5 BC546
T6 BC546
T7 BC546
T8 BC546
T9 BC557
T10 BC557

VD1 1N4148 ok alle diode
VD2 1N4148
VD3 1N4148
VD4 1N4148
VD5 1N4148
VD6 1N4148
VD7 1N4001
VD8 1N4148
VD9 1N4148
VD10 1N4148
VD11 1N4148
VD12 1N4148
VD13 1N4148
VD14 Zener 8V2 ok bestilt 2
VD15 Zener 9V1 ok bestilt 3
VD16 red color LED
VD17 green color LED
ST TH1210D is specialty diode for T1 [IRF740]

Ahhh i see is a substitute for irf740 or the other way..case closed

[porkluvr]

C30 4700uF
C31 4700uF
C32 4700uF

ST TH1210D is specialty diode for T1 [IRF740]

Ahhh i see is a substitute for irf740 or the other way..case closed

I'm glad I asked but I'm still a little bit confused.

Maybe the FR diode is not meant to replace the IRF740 but is suggested to be placed across the IRF740 to help reduce the flyback time?
Just a guess.

Think about it - you simply cannot replace the IRF740 with a diode. No how, no way. Or, at least I don't think so. But, putting a FR diode (in reverse) in parallel from source to drain would help reduce flyback time. IRF740 already has a reverse connected diode from S to D. Adding an FR diode would speed things up a little bit.

Even better might be to use a MOSFET that already has FR diode. I know of only one such MOSFET at this time, but I am sure there must be others.
I found this only by accident:

STF12NM50ND has FR diode: http://www.st.com/stonline/products/...e/ds/14936.pdf

STF12NM50N has a slower diode but is, apparently, otherwise identical:
http://www.st.com/stonline/products/...stf12nm50n.pdf


I am interested in the FR diode version but unfortunately the TO220 package is not stocked by my favorite distributer, only Dpak or DDpak are stocked. I will search some more when I get time, or maybe try the DDpak in my project (if it ever gets to that stage of completion).

Without having the exact diagram to go along with the parts list you posted I don't know where two of the 4700uF capacitors go. I can only find one 4700uF on my DP schematic. Maybe they are all supposed to be in parallel, which would provide 3x the filtering; a very good idea.

++++++++++++++++++++++++++++++++

Here is a link to the STTH1210D. http://www.st.com/stonline/products/...4/stth1210.pdf

tuxnor, what you are probably wanting to do is stick to the original DP schematic but add one FR diode across the IRF740, and add two 4700uf capacitors across the one that's already there. (?!) Be sure and connect the FR diode in reverse, or else it will muck things up and won't last very long.

[apocalypto]

MY DELTA PULSE

my delta pulse emit a continued sound, when I press the RESET the sound fall down but after 5 seconds it apear again (a continus sound). what the problem?

[tuxnor]

at last

at last STT diode shown up ,,but 4700 uf c32

[tuxnor]

youre right

I'm glad I asked but I'm still a little bit confused.

Maybe the FR diode is not meant to replace the IRF740 but is suggested to be placed across the IRF740 to help reduce the flyback time?
Just a guess.

Think about it - you simply cannot replace the IRF740 with a diode. No how, no way. Or, at least I don't think so. But, putting a FR diode (in reverse) in parallel from source to drain would help reduce flyback time. IRF740 already has a reverse connected diode from S to D. Adding an FR diode would speed things up a little bit.

Even better might be to use a MOSFET that already has FR diode. I know of only one such MOSFET at this time, but I am sure there must be others.
I found this only by accident:

STF12NM50ND has FR diode: http://www.st.com/stonline/products/...e/ds/14936.pdf

STF12NM50N has a slower diode but is, apparently, otherwise identical:
http://www.st.com/stonline/products/...stf12nm50n.pdf


I am interested in the FR diode version but unfortunately the TO220 package is not stocked by my favorite distributer, only Dpak or DDpak are stocked. I will search some more when I get time, or maybe try the DDpak in my project (if it ever gets to that stage of completion).

Without having the exact diagram to go along with the parts list you posted I don't know where two of the 4700uF capacitors go. I can only find one 4700uF on my DP schematic. Maybe they are all supposed to be in parallel, which would provide 3x the filtering; a very good idea.

++++++++++++++++++++++++++++++++

Here is a link to the STTH1210D. http://www.st.com/stonline/products/...4/stth1210.pdf

tuxnor, what you are probably wanting to do is stick to the original DP schematic but add one FR diode across the IRF740, and add two 4700uf capacitors across the one that's already there. (?!) Be sure and connect the FR diode in reverse, or else it will muck things up and won't last very long.

THANKS..youre all right ..not a replacement for irf740 and i also found schema at last

[kt315]

my delta pulse emit a continued sound, when I press the RESET the sound fall down but after 5 seconds it apear again (a continus sound). what the problem?

in reality delta pulse does not need in RESET knob. sound must fall down yourself, but more longer in time. IMO it has SAT autotuning... RESET knob is only sorta an help to decrease long time of SAT tuning, to do not waste a time on the tuning.

[porkluvr]

at last STT diode shown up ,,but 4700 uf c32

That is a more usual place for the FR diode (instead of being in parallel). I had an argument earlier in this thread where I tried to prove that adding an FR diode in series (as shown in your schematic) would improve the flyback time in the Deltapulse.

I don't recall having won that argument, but that would not stop me. I would still use a series diode because I believe you will see a faster time for your flyback voltage to decay to an acceptable level for sampling. I think that the optimum value of damping resistor will be different depending on whether or not you use the series diode. That will depend on your coil and would need to be determined experimentally.

On another note, just today I looked at what might happen if an FR diode were placed (in reverse) ACROSS the IRF740, and it does not look like a good idea because it does not seem to make the decay happen more quickly. Don't do that. Now, maybe if a MOSFET with an intrinsic FR diode were used it would be an improvement over a MOSFET with a standard zener, but that is a whole new ball game and I won't say another word about it. I have added too much confusion already.

[tuxnor]

That is a more usual place for the FR diode (instead of being in parallel). I had an argument earlier in this thread where I tried to prove that adding an FR diode in series (as shown in your schematic) would improve the flyback time in the Deltapulse.

I don't recall having won that argument, but that would not stop me. I would still use a series diode because I believe you will see a faster time for your flyback voltage to decay to an acceptable level for sampling. I think that the optimum value of damping resistor will be different depending on whether or not you use the series diode. That will depend on your coil and would need to be determined experimentally.

On another note, just today I looked at what might happen if an FR diode were placed (in reverse) ACROSS the IRF740, and it does not look like a good idea because it does not seem to make the decay happen more quickly. Don't do that. Now, maybe if a MOSFET with an intrinsic FR diode were used it would be an improvement over a MOSFET with a standard zener, but that is a whole new ball game and I won't say another word about it. I have added too much confusion already.

Hmm,,is it 1n4001 ? they have added as substitute for stth ?or like this?

[porkluvr]

Hmm,,is it 1n4001 ? they have added as substitute for stth ?or like this?

No! You must realize that by using the IRF740 the circuit will usually have a peak voltage close to 400V. That would destroy the 1N4001 very quickly. You also have peak current somewhere around 2~3 amps depending on your pulse width and coil. That also eliminates other 1N4001 series devices. Don't be cheap, or else you will blow something up! Also, soft recovery is recommended in addition to being fast.

Digikey carries the STTH1210D diode for about $2.00 and they ship to most countries if I am not mistaken. This particular diode looks like a very good choice. There is nothing wrong with using a bigger diode than needed, so long as it can fit.

[apocalypto]

Battery problem

I wl'd to ask if this battery is better for DELTA PULSE and i wl'd to ask why i can test if my battery is ok or not (It decharge rapidly)
thank's

[che]

Thank you for your reply KTE15

if you press the knob RESET the sound would fall down in few seconds..

yes its true

the sound falls down to zero level, then you begin to turn THRESHOLD pot before a moment the sound will reveal again in staccato style. then you slightly turn it back before the sound must be dissapear to zero again.

I have taken this matter
but
When far from the hands of (RESET) hear the beep sound of a new

how i do run!

[edtsr]

what could be the problem of my delta pulse, it only detects metal when it is very very close to the coil ( 23 turrns, #24 , 40 cm), IRF 740 does not get warm ( changed already but the same ) problems encountered during initial test, first broken connection between vD8 to vD9 and broken connection between P3 ( 20 K Pot) to R4 (5K6). TR2 is set 100Hz.

[tuxnor]

1n4001

have they used this 1n4001 as a substitute for stth diode ??


http://v.youku.com/v_show/id_XMTIzNDA2NzMy.html

guess he have 2 gsm celluar phones also in the pocket and one 433mhz from office
faraday shield