PCS-Electronics

Hello,
My palette 150w amplifier transistor BLF278 generates a lower power signal at the beginning. I noticed that the power supply generated abnormal noise, as if this one was shorted. The supply voltage is much lower than 27V. I tried with a load resistor and this is the same. The BLF278 transistor has a black mark on the sides but no more. Also it always as hot as it seems to me defective. Is it broken? How could I remain so quickly before ordering another? This can come from the power module? Thank you

It is very difficult to understand you, automatic google translation?

150W PA with BLF278 makes no sense. The BLF278 is a 300W 48V MOSFET.

The supply voltage is much lower than 27V

Power supply seems to obviously be your problem.