| No | Part number | Description ( Function ) | Manufacturers | |
| 2 | NTE1231 | Integrated Circuit Complete 4 Watt TV Sound Channel NTE1231 & NTE1231A Integrated Circuit Complete 4 Watt TV Sound Channel Description: Capable of carrying out all of the functions of a TV sound channel, the NTE1231 and NTE1231A silicon monolithic integrated circuits consist of a six–stage IF amplifier/limiter, low–pass filter, differential peak detector, DC volume control, regulated power supply, audio preamplifier, and out |
 NTE |
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| 1 | NTE1231A | Integrated Circuit Complete 4 Watt TV Sound Channel NTE1231 & NTE1231A Integrated Circuit Complete 4 Watt TV Sound Channel Description: Capable of carrying out all of the functions of a TV sound channel, the NTE1231 and NTE1231A silicon monolithic integrated circuits consist of a six–stage IF amplifier/limiter, low–pass filter, differential peak detector, DC volume control, regulated power supply, audio preamplifier, and out |
NTE |
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List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
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| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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