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Old 18th February 2003, 05:30 PM   #1
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Exclamation Change medium transistors...

Can I Change medium transistors in my amp
from 2SC2073/A940 to TIP102/107... ??
and what is do if i change them???

if is matter so... my amp work on 70V+/- the output transistor is 2sc5200/A1943...

Information about 2SC2073/A940 ~ TIP102/107
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Old 18th February 2003, 05:40 PM   #2
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Hi, Dj BASS AMP

I think you can't change the 2SC2073/A940 to TIP102/107
because the TIP's are Darlingtons.
Some substitutes could be those:

2SC2073: BD239D, 2SC1669, 2SD608(A), 2SD1138
2SA940 : 2SA839, 2SB608, 2SB628(A), 2SB861

But why would you change them, are they broken?

/Hugo - doesn’t know why one should change transistors if the old ones are OK
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Old 18th February 2003, 05:57 PM   #3
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if i change to transistor stronger what it will do to the amp???
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Old 18th February 2003, 07:28 PM   #4
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What do you mean by stronger? More current, more voltage?

Nothing will happen; it only means that the transistors are able to resist more voltage and more current. But as long as you don't give them more voltage or current, nothing will happen.

To make the amp more powerful, you probably have to redesign
a lot of things.

/Hugo
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Old 18th February 2003, 07:36 PM   #5
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ok thanks man !
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Old 20th February 2003, 01:02 PM   #6
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can i change from 2SC2073/A940 to MJE15030/1 or TIP41/2C ??
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Old 20th February 2003, 03:01 PM   #7
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can i change from 2SC2073/A940 to MJE15030/1 or TIP41/2C ??
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Old 20th February 2003, 03:14 PM   #8
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I think Hugo has pretty much answered your question already.

Why do you want to change the transistors? If you are hoping
to get more power out of the amplifier you most likely have
to replace most of the expensive components, like transformer,
filter capacitors, output transistors, heatsinks etc. This would
mean a complete redesign, so it would be better to start from
scratch and build a new amplifier.

Anyway, if you still want to change the transistors for some
reason, you will at least have to provide a schematic or tell
what amplifier it is. Now we don't even know if you are talking
about the OPS drivers or the VAS transistors or whatever. I
think nobody can give a good answer without more information.

And once again, first make clear to yourself why you want to
change the transistors.
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Old 20th February 2003, 03:25 PM   #9
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i only want to now if i can to change from 2SC2073/A940 to MJE15030/1 or TIP41/2C without ask for more power...

i only want to now if i can to change them and the amp still work... OK?
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Old 20th February 2003, 03:38 PM   #10
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Default transistors

Quote:
Originally posted by Dj BASS AMP
i only want to now if i can to change from 2SC2073/A940 to MJE15030/1 or TIP41/2C without ask for more power...

i only want to now if i can to change them and the amp still work... OK?
Writing in bold is not going to change what Christer said. Different transistor types are, well, different in some respects. Without knowing where/how they are used, it is impossible to say whether these differences make a difference in your amp. You may be OK replacing them, but they may also make your amp smoke.

Jan Didden
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