|
The
TDA7250cfp
This
2-channel hybrid IC is normally configured with TIP142/147
power darlingtons for its' output. For those who prefer
to use power transistors instead, the TDA7250 can easily
be converted. All that is required are a few transistors,
4 additional resistors and some rewiring.
This
conversion centers mainly on changing the output section
to a Sziklai.
Sziklai
Output |
In
our IA502 on the right, drivers Q1,Q2 are 2SC2238
and 2SA968, and outputs Q5,Q6 are 2SA1216 and 2SC2922
respectively.
No
instability problems were encountered from this conversion.
After a period of run-in, the amplifier remained thermally
stable.
Is
this version worth the extra cost and effort? |
If one is only interested in something basic,
the TIP version would be sufficient. But if one is after sonic
performance, I would recommend this version. |
2SC2922/2SA1216 hardwired |
the
TDA7250 ic |
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