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john121

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  1. Thanks for the reply Thanks for the reply. Sorry for the massive delay in responding. What impedance value speaker do you think i could use in the amplifier design right at the top of the page, the first post. I have a 4 ohm speaker which has a nominal impedance of 4 ohms and a minimum impedance of 1.8 ohms, do think the impedance is safe, or too low. Many thanks.
  2. Hi Thanks for reading. Okay I want to build a simple audio amplifier with absolute minimum components. So far with my amateur attempts i have built a single stage amplifier using a 2sc5200 transistor, with a 1uf capacitor and 1000 ohm resistor as an input stage, but it sounds like a glorified headphone amp, very little output about half a watt. Do you have any minimal component designs which can put out about 5 watts, or if this is not possible a two stage amplifier consisting of a driver transistor followed by an output transistor, again minimal components. I have 2sc5200 transistors so will appreciate any designs incorporating these. Thanks
  3. Thanks for the reply,much appreciated. The new circuit you posted is brilliant, i would like to try and improve the amplifer circuit i posted up, is there anything that can be done to address the problems you mentioned.
  4. Thanks! What do you think, any way to improve the circuit, improve the sound quality.
  5. Hi And thanks for reading. I have just put together my very first amp and would love some feedback on the circuit. The sound quality is disappointing, works ok, but is there anything you can think of to improve performance. Please see attached image. Thanks!
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