Sorry I don't understand. The TTC004B replaces the BD139. This amp doesn't use the complementary BD140, so you shouldn't need the TTA004B.
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Are you getting the full 12v at VCC or dropping some by power supply filtering?
OK, the PNP is for another project, from Silicon Chip magazine, using BD139-140 in the finals. Sorry for the confusion...
I get exactly 12V after filtering with 2 caps of 2200uF and a 10 ohm resistor the output of a power supply delivering 13.5V "as is".
Now I tested the amplifier with a SMPS, salvaged from a vintage analog video camera adapter, made by Sony. There is no noise at all and the sound seems more detailed.
In the future I will build these amplifiers with the power supply described above - let's wait and see....
About the supply voltage raise...apart from the use of high(er) impedance headphones, I intend to use this amplifier, if possible, with some small desktop speakers...as is, I think I could use with some special speakers I have - 50 ohms speakers - but it could be more interesting to use normal speakers. I don't expect much power, just to replace the built-in TV speakers permanently...