aleph 2 problem

Status
Not open for further replies.
i finished my aleph 2 cnstruction and i tested forgeting to connect the led diode. almost emediately the mains fuse was melted. i checked the circuit and after connecting the led i changed all irfp 240 of the constand current side.i found at least 2 short circuited and 2 power resistors(1om)destroyd.
i turned then the amp on and as a result after 30 sec of normal operation (dc ofset 40mvolt)the220 om resistors next to the irfps started burnig and i stop any eford in doing anything else.
question:all theese happened because i didnt connect the led ?what do i do now?
 
The LED should not have had anything to do with it.

Most of the time this happens there is a wiring or component
value error. Time to start looking for it, and also think about
how you can limit the supply power for next time you fire
it up.

😎
 
You have almost 20% higher dissipation than stock that you need to cope with (you could reduce bias a bit) otherwise not a big topic.

Or you could burn 1 or 2 V's by building a CRC supply.

Have fun, Hannes
 
Status
Not open for further replies.