Re: 2N3055 failure (power supply)


<cbarn24050@xxxxxxx>


** Nonsense.

The OP supplied a partial schem and STATED that it was a current
limited
supply.

Well i guess Phil, one of us cant read.


** If you were not such a complete *** might feel sorry for you.



Both these problems are easily solved by looking at
the application notes for the 723.


** The OP very likely has a schem like figure 4 here:

http://www.national.com/ds/LM/LM723.pdf

Maybe but since he didnt state it its just speculation on your part.


** An educated speculation that has been now confirmed as correct.

Enjoying your sour grapes ????



Rsc is probably one of the 0.1 ohm ballast resistors shown in his schem,
resulting in a 6.5 amp limit per 3055 device.

That would be too bad if it was since the 2n3055 wont survive a short
at that current for long.


** Its within the DC safe area curve for a 2N3055.

A temp cut out switch on the heatsink would prevent failure.

PSU design is obviously way over your pointy head - ***.




......... Phil



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