Hi All,
I've been looking for an amp build that was: 1)easy, 2)in the 30-40 watt range, and 3)used a single rail power supply so that it was 4)cheap. After untold hours of searching, I seem to have found the solution in two schematics that use the TDA2030 in conjunction with two power transistors. The first schematic comes from a kit offered by quasar electronics (UK) (
**broken link removed**) (schematic is a pdf listed at the bottom of the description, and the other is listed on elecfree.com (
https://www.elecfree.com/circuit/power-amplifier/30w-amp-otl-by-tda2030-transistor/
Power Amplifier : Power Amplifier OTL 30W by IC TDA2030 +Transistor).
My questions for the list are as follows:
1) I would prefer to build from the schematic from the quasar kit because I know it is proven, and it puts out more power. However, they (of course) do not list any component values other than the IC and Transistor types, and the input voltages. I'm more of a "follow instructions guy" when it comes to amp building, so I have no idea how to calculate these values. Can I use similar values from the other schematic (the elecfree one)? That schematic is very similar except that it uses different transistors and has a lower input voltage (and is missing the equivalent of C2, R1, and R3 in the quasar schematic).
2) As the TDA2030 seems to be hard to find here in the states, I have looked up the NTE replacement for it, which is the NTE1380. Looking over the datasheet, it *seems* to be an exact duplicate. Is anyone aware of any deviations from the TDA2030 pinout?
3) As far as the transistor types: I was unable to find the exact types from the schematics. Can I uses some sort of generic equivalents? Any suggestions on which ones?
4) Any other suggestions about these schematics?
Any help would be greatly appreciated!!!