Recent content by blacksheep1

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    Transistor datasheets with collector curves

    I am actually trying to understand how to design a transistor stage :) I don't know much about it and i think it is very confusing -- i don't know where to start and where to end. I thought about transferring the theory about vacuum tubes to transistor design, because i understand it better. In...
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    Transistor datasheets with collector curves

    I don't know why it is so difficult to find datasheet with collector curves for any general purpose transistor. I have looked for datasheets for bc547, bc549, 2n2222 and others . Does anybody know where to find good datasheets with the Uce - Ic curves and Ube - Ib curves included for standard...
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    Guitar Amplifier

    No i didn't remove the diodes... maybe thats the problem ::) What do you mean about an emitter-follower? I've heard about it before but i don't know what it means... But thanks... i'll try that very soon :)
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    Guitar Amplifier

    The speaker was connected through a power-amp... I don't know anything about the impedance :-( but I still think it's the way that the preamp is made... you know, some guitarists likes distortion, but i want a clean pre-amp :-)
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    Guitar Amplifier

    I did build the pre-amp of this project: 100W Guitar Amplifier Mk II http://sound.westhost.com/project27.htm The problem was that almost nothing was comming out of the speaker unless i was turning up the gain-control, and then I got distortion. The Volume-control was as high as possible...
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    Guitar Amplifier

    Ante, I've already tried building the pre-amp - the problem is, that the sound isn't clean. I wanted a clean pre-amp :-) But maybe i could use the power-amp schematic... Thanks :-) Really nice site, EDY, but it's still tube-amps :-[ hehe But, thanks for helping. I would really like some...
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    Guitar Amplifier

    Thanks for the links, but it seems like its only tube-amps, and thats not what i'm interested in... :-) hehe... Maybe somebody have some schematics of a (very) simple preamp with TL072 or similiar opams. I think, it could help me to find out how to work with opams...
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    Guitar Amplifier

    Hi :-) I want to build a guitar amplifier, but i haven't found any useful schematics yet... I want it to be powerful, maybe 100 Watt if its possible, it has to be a clean pre-amp (which means: no distortion), low-noise as possible (no hiss) and a 3-band graphic equalizer (low, mid and...
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    sine wave generator

    Thank you :)
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    sine wave generator

    It is easy to build a square wave-generator with a NE555, but it is possible to build a sine wave generator with the NE555? If not, i would like if somebody have some ideas, how to build a sine wave generator
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    Led display Digital Voltmeter question

    mixos: Thank you very much for your reply... i have one more question: I've made a digital amperemeter with a voltage-to-frequency-converter (LM131), an amv (NE555), some mmv's (MC14538), some bcd-counters (MC14518) and some bcd-to-7segment's (MC14511).... is it possible to build an ampere...
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    Led display Digital Voltmeter question

    Does somebody know how i can make a digital amperemeter? It's for a power supply...
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