PLEEEEEEEEEEEEEEEEEEEEESE HELP ME PROBLEM DELTA PULSE

[apocalypto]

I finish the making of delta pulse, I tested it..................nothing [angry]

- Battery : 12V 2.3 AH

- Serach coil : ø25 cm, 30 turns of 0.5 enemable CU

- Volume capacitor (100 ohm) not assembly

Results :

- Nothing.
- IRF 740 Heat in 5 min working.
- very Low noise from Coil search

[apocalypto]

Please help me i'm a mechanical engineer not a electronical , I'm here to answer to your question, please help me

[grungymike]

740 blues?

One thing I've learned in my reading is that the IRF740 is really sensitive to static electricity while being installed on the board. You might have spiked it during assembly. To avoid this, you should use a grounded soldering iron, or battery powered, also make sure the board, workbench, and yourself (wrist strap) are grounded to earth while installing this part.

This ain't a bad protocol to follow when insalling ANY semiconductor device. Some are pretty easily spiked by static electricity.

Hope this helps...

gm