| Clipped |
im fixing my friends old audison amp, and am having problems finding the original part for the transistors in the output section.
the originals are STmicro BDW93/94c and i cant find them, the only thing i can find is the STmicro BD911/912 pair.
the volt/amp ratings are ok, but the:
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hfe @ Ic Vce min/max are totally different.
BD= min-15.....max-150.......(A)5...(V)4
BDW=min-750...max-20000...(A)5...(V)3
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Vce(sat)@Ic Ib are also different
BD= (V)1 ....(A) 5....(ma)500
BDW=(V)2......(A)5....(ma)20
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will the BD work? what exactly is hfe and Vce?
thanx |
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| djQUAN |
| Hfe is transistor gain and Vce is voltage across emitter and collector. (sat) means saturated or completely on. |
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| Perry Babin |
The originals are darlingtons. The BD911 pair won't work.
If you can't find the originals, the TIP102/107 or the TIP142T/147T pairs should work. The 102/107 has a lower current rating but should work if he's not abusive. |
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| Clipped |
| darlingtons, it should be fun finding those here... :( |
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