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| About me... |
| D3M0niQ |
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| SUBSTITUTING COMPONENTS |
| People living outside Europe may have problems getting those components types widely used in Europe. Here are some substitutes: DIODES 1N4148 - a small signal diode which is easily available and has the following specs: Diode type: Fast switching diode Voltage rating: 100 V Current rating: 0.2 A Swithing time: < 4 ns Its replacement: 1N914 or 1N4448. 1N4001 - a very common rectifying diode with the following specs: Diode type: Rectifying, general purpose Voltage rating: 100 V Current rating: 1 A You can replace 1N4001 with almost any general purpose rectifying diode with similar or better specifications. In some circuits where 100V voltage rating is not ehough, I use 1N4007 which is essentially the same as 1N4001, but has a 1000 V voltage rating. NPN TRANSISTORS BC547 is a very common general purpose transistor in European electronics circuits and has following characteristics: Voltage rating: 50V Maximum current: 0.1A Power rating: 0.5W Frequency range: 300 MHz You can try replacing it with many general purpose trnasistors with similar specs without much problems. The best ones would be 2N2222 and 2N3904 universal NPN transistors. They have the following specs: 2N3904 2N2222 Voltage rating: 60 V 60..75V Maximum current: 0.1 A 0.8 A Power rating: 0.625 W 0.5 W Frequency range: >250 MHz >250 MHz Amplification (B): >100 >100 PNP TRANSISTORS BC557 has following specs: Voltage rating: 50 V Maximum current: 0.1 A Power rating: 0.5 W Frequency range: 150 MHz Its replacement is the 2N3905 transistor: Voltage rating: 40 V Maximum current: 0.2 A Power rating: 0.625 W Frequency range: >200 MHz Amplification (B): >50 Or you can use 2N3906 which has similar characteristics, but the amplification is >100. |
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