JDinPA17603 Messages: 69 Registered: May 2018 Location: Lancaster, PA
Member
1. See my previous long note.
2. Use a light bulb limiter
3. Recheck all transistors / diodes.
4. The 5 watt 0.5 ohm transistors shoul match each other closely and the closer to the 0.5 (1/2) ohm they are the better.
5. Drivers must have heatsinks on and not shorting to anything else.
When you put the wrong transistor in you probably blew the output transistor. With it gone putting in the nte129 with the output still blown most likely damaged it.
Note 3 above and previous note.
Good luck.
John
Old Us Navy Vietnam Vet
Playing for my own enjoyment and irritation of the neighbors.