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ampage archive
Vintage threads from the first ten years
Learner Question
 12/25/1999 6:59 AM |
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| MK | Learner Question I'm new at the mathematics end of tube electronics but I'm trying to pick up the basics bit by bit. I am curious how one computes the peak-to-peak output voltage for a phase inverter stage in an amplifier, or the voltage output of any stage for that matter. I've seen the following formulas on various websites: Av = (mu*R1)/(R1/ra) where mu=amplification factor, R1=plate load and ra=plate resistance. Vout(RMS)=Vpeak*0.707 and Vpeak=(Vp-p)/2 I know Ohm's law and the companion power formula and a bunch of other tidbits from sites by Randall Aiken and Steve Bench. I'm learning to draw load lines and the like but I'm still wondering if I'm missing some simple basic formula for figuring out the output voltage of a given stage, especially a phase inverter stage. Easy EX. How would I figure out the p-p output voltage on a 5F6-A Fender Bassman schematic? How about the output voltage of the preceding 1/2 12AX7 stage? Thanks for any advice. I DO plan on picking up real tube electronic books soon but I really want to see just how much info I can learn on the Internet alone. Thanks. |
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| Carl B. MK, |