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Map Amplifier Based on TDA7293

2015-01-04 01:31  
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Here is a montage that works very well.

This is the Kit Sélectronic whose heart is an integrated circuit TDA7293.

The sound is particularly good. As long as you follow the 2 value changes I propose, it far exceeds the average quality amps trade!.

Map Amplifier Based on TDA7293

Power output:

Next voltages of the transformer, the amp can do:

30 watts RMS into 8 ohms, with a transformer 2 x 18V ~

50 watts RMS into 8 ohms, with a transformer 2 x 24V ~

However, with 2 x 24V ~ transformer, the circuit heater ... even without music. Think about it.


The wiring of the card:

Map Amplifier Based on TDA7293



Map Amplifier Based on TDA7293


Attention, three points should not be overlooked:

1. The kit comes WITHOUT radiator, but it is MANDATORY!

2. You are free to choose a good model ... One in the photo is the minimum size I recommend for normal use in an apartment.

3. As with any active component, the sole of the TDA7293 is a significant potential:-35V!. Use isolation kit provided and check the insulation between the screw and the radiator ohmmeter BEFORE powering the first!. DANGER.


This circuit is not absolutely protected against short-circuits. A short circuit of a tenth of a second on the HP output TDA7293 destroyed.

Attention to the copper wires on the terminal block badly ordered HP!

You have been warned. But for 25 euros per channel and the sound it has, this mount is greatly worth it.