den15betts
New Member
Hi guys this is my first post - please be gentle! My interest in electronics has just been piqued by my building a guitar effects pedal - a simple amplifier to boost the signal without (much) distortion.
I was interested in how this thing worked so I hunted down and have (mostly) read 'Success in Electronics' - a book from my school days 25 years ago, which has a couple of chapters on audio freq. amplifiers. I understand how most of the pedal works but I don't understand the design of the circuit biasing the base - i.e. the 'cross' of the 100K, 10k, 47k resistors and 22µF cap.
My simple mind just can't come to terms with voltages, currents etc in this arrangment. Can anyone explain the choices made by the designer? I wish I'd paid more attention in physics lessons with Dr Newly nearly 3 decades ago (mind you he was a right git!).
I was interested in how this thing worked so I hunted down and have (mostly) read 'Success in Electronics' - a book from my school days 25 years ago, which has a couple of chapters on audio freq. amplifiers. I understand how most of the pedal works but I don't understand the design of the circuit biasing the base - i.e. the 'cross' of the 100K, 10k, 47k resistors and 22µF cap.
My simple mind just can't come to terms with voltages, currents etc in this arrangment. Can anyone explain the choices made by the designer? I wish I'd paid more attention in physics lessons with Dr Newly nearly 3 decades ago (mind you he was a right git!).