Amplifier on the chip K174UN7. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Transistor power amplifiers
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Old design, but good quality.
This is one of the simplest options for a low-frequency power amplifier using the K174UN7 chip. Output power 4,5W. The load can withstand up to 4 ohms. The microcircuit is Soviet, but finding it is not a problem. They are full of transistor TVs. The microcircuit should be installed on a small heatsink (All boards come with heatsinks, so this is not a problem either. But if you can’t find it already, you can use foreign analogues: TBA810AS and LA4420 (they are naturally more expensive).
Chip parameters can be viewed at chipinfo.ru/dsheets/ic/174/un7.html
(click to enlarge)
Now I'm working on a printed circuit board for the circuit. Who should contact at: radiolomaster {dog} rambler.ru
Author: radiolomaster; Publication: cxem.net
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