#1- If the circuit is running from a single 9V, the audio output needs to be sitting somewhere in the middle of that so it can swing +/- some volts
I appreciate your self confidence, and the confidence that store has in your design future. Sorry for the rant, I just want to get moving here. I am about to start flipping burgers to pay rent, I don't want that. I just want to see it applied in front of me, I want to see a real deal calculation of a transistor bias on paper so I can look at it and emulate it. I know about saturation points, and q points, and breakdown points, and tolerances, and chemical make ups of parts, and wipers, and balanced vs non balanced and EMF and transformers and step up and down and bandwith and inductance and impedence calculations. Please be objective, I want to see a real deal walk through. I could put the components around it and I know it will have common emitter setup most likely but how do I draw the needed information and put it together? it would need a coupling cap, pull resistor, emitter bias resistor, ground network, cutoff freq, hfe calculatoin, VCC maybe a swamp resistor. The bottom line seems like it is expressed 90 percent of the time with so much fluff. I don't want to read a crazy technical book that has tons of excess information. Is there a walk through I can look at for biasing a transistor? I want to look at the entire process just one time and watch the math. What is the cheapest DC variable voltage source that I can get? I have rent to pay, I need to get the show on the road and become a designer at least for something basic like solid state pre amps, EQ's or even simple fuzz pedals. Here is what I don't understand, what is the pull down or up resistor doing? How do I calculate that? What are the most important things I should be pulling off of the datasheet? All the technical reading I have done has taught me a fair amount but I need to start using all of the information I learned in school to start making amplifiers. Now it is time to bias it! I know Ohms law, I know Xc ( 1 / 2*pi*frequency*Farrads ) is used for DC blocking and to set up the input low cut frequency. Okay, I understand hfe, I understand Vcc, Vb, Vbe, Ic.
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