Delta Pulse

[hadi-dindar]

bro how i can test irf840 ?
can you help me

[jap]

Hi hadi-dindar
when irf840 is hot -
-what specification of coil? what resistance?
-Be sure of value R5 /1w?
best time
j.

[szucs_g]

These questions are correct! My little coil 27 turn (0,5 mm cu wire with laquer insulation) 450uH, ca. 3 ohm resistant, the big one from UTP cable (400 mm diameter), ca. 550 uH, 3x8 turn. Works all well. IRF not warm.

http://www.geotech1.com/forums/showt...a-Pulse/page10

From this page are wery interesant informations. Not easy but their perusal is useful. Takes 1-2 days, but is repaid. 1-2 components escape.

[hadi-dindar]

Hi hadi-dindar
when irf840 is hot -
-what specification of coil? what resistance?
-Be sure of value R5 /1w?
best time
j.

ok r6 and r7 are 680r 1w

i have 35cm and 3.4 ohm ( wire 0.8 with cat5 cable )

[jap]

Hi hadi-dindar

( wire 0.8 with cat5 cable ) (cat5 cable not 0.8 is 0.5mm)
in dp2
R5=1.2K~2.2k /1w
R6=680 , R7=15K
-IF coil resistance 3.4 ohm add in series to coil 2.2/1w

best time
j.

[hadi-dindar]

Hi hadi-dindar

( wire 0.8 with cat5 cable ) (cat5 cable not 0.8 is 0.5mm)
R5=680~1.2k /1w
r6=1k
-IF coil resistance 3.4 ohm add in series to coil 2.2/1w
best time
j.

bro i have one 1.5k 2w resistor /
can i add this resistor inistate of 680ohm with 3.4 ohm coil ?

[jap]

Hi hadi-dindar
R5=1.2K~ 1.5k ~ 2.2k /1w
r6=680,R7=15K
-IF coil resistance 3.4 ohm add in series to coil 2.2 ohm/1w
best time
j.

[Nicolas]

Hi hadi-dindar
In this case it is necessary that your coil is 6.2 Ohm
as he explained our dear Jap
And checked the transistor BC 557 I had this problem
made to change the IRF 740 by another 840

best time
N.

[hadi-dindar]

Hi hadi-dindar
R5=1.2K~ 1.5k ~ 2.2k /1w
r6=680,R7=15K
-IF coil resistance 3.4 ohm add in series to coil 2.2 ohm/1w
best time
j.

hi my dear . jap
my r5 now is 1.5k 2w and r6=680ohm 1w
but not work
and current in circuit is zero

and my coil ohms is 3.4 ohm
3.4 ohm is match with informations ( r6 and r5 ) ?

[szucs_g]

Prepare a picture from IRF neighbourhood. I revised it the sch. It may be IRF only according to me, if without a coil not short-circuit.

My little coil big like Garett coil. http://n1.vatera.hu/photos/6a/2f/9d16_1_big.jpg
450uH, 3,4 Ohm and work fine.

The frequencies is ca. 500Hz. If the freq. low the IRF warming with low resistant coil.

[sparky]

Does anyone have parts placement sheet or schematic for the 7 knob Turkish delta pulse? I found the 6 knob but it's not close enough.

[Nicolas]

Does anyone have parts placement sheet or schematic for the 7 knob Turkish delta pulse? I found the 6 knob but it's not close enough.

[ATTACH]21305[/ATTACH]

Look it.

Green circle for Plot or Knob
Red Circle Connection LCD with PIC 18f252

Best time
N.

Delta pulse _ema (1).pdf

[jap]

Hi hadi-dindar
-Is irf840 is hot now ?
-change Q1=IRF740 OR 840
-change D1=UA556
-Tested and check T9
best time
j.

[hadi-dindar]

hi jap.
i changed 840 and 556 and t9
but Not true my dear.

can you help my to crate a pefrect coil for my set ? and i have only 680ohm . 1w nad 1.5k 2w resistance for r5,r6 .

[jap]

Hi hadi-dindar
-coil 40 cm 0.5 mm 24 turn =adsl cat5 3x8turn ...2.6 ohm
Put pictures of the project
best time
j.