The radio designer &quot;Start-7240&quot; (Low frequency amplifier 2x2 W) has been producing the Kamenets-Podolsk plant Elektropribor since the 1st quarter of 1989. The radio designer allows you to assemble a stereo power amplifier used in portable or stationary equipment with a supply voltage of 6 ... 15 V. The amplifier contains a minimum of parts, is easy to manufacture, and does not require adjustment. The circuit consists of two identical channels, each of which is assembled on an integrated circuit K174UN7. As a load, you can use loudspeakers with an impedance of 4 ... 8 Ohm and the corresponding power. Main characteristics: Frequency range - 40 ... 20,000 Hz. Rated input voltage 250 mV. Rated output power, at a load of 4 Ohm at a supply voltage of 12 V 2x2 W, maximum 2x4 W. Harmonic distortion at a frequency of 1 kHz, no more than 1%. Supply voltage 6 ... 15 V. Current consumption in the absence of a signal is not more than 40 mA. Dimensions of the board 167x92x45 mm. Macca 200 g.

e and diagrams of the radio designer &quot;Start-7240&quot;. Description of the radio designer in the magazine

for 1993. Materials: Yuklyanyuk Oleg Gennadevich, Nikolaev.

Radio constructor `` Start-7240 ''.