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150W PA BLF278 broken ?

 
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150W PA BLF278 broken ?
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ludo_lx13
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Joined: 27 Sep 2010
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Post 150W PA BLF278 broken ? Reply with quote
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
Sat Aug 08, 2015 7:28 pm View user's profile Send private message
pcs
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Post Reply with quote
It is very difficult to understand you, automatic google translation?

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OgreVorbis
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Joined: 30 Jan 2014
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Post Reply with quote
150W PA with BLF278 makes no sense. The BLF278 is a 300W 48V MOSFET.

Quote:
The supply voltage is much lower than 27V


Power supply seems to obviously be your problem.
Tue Aug 11, 2015 4:04 pm View user's profile Send private message
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