When friends want Dual Regulator +15V GND -15V. Usual like to to use the integrated circuit LM7815 and LM7915. But sometimes seek the integrated circuit no will do ? Today I leads old circuit , but be worthy give friends. Try out the one choice use the transistor and Zener Diode 15V can use be [...]
A 24 Watt Class A Amplifier made from discrete semiconductors, built and tested by Marc Klynhans from South Africa.
The supply voltage can be between 34V and 46V and the quiescent current should be set to 1.7A measured through R25 (a voltage of 0.75V must be measured over R25 for a quiescent current of just under [...]
Transistors types have been altered to ones that are more readily available. [...]
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