Wet your pants funny-- A.J. as an EE
- From: "Ancient_Hacker" <grg2@xxxxxxxxxxx>
- Date: 21 Feb 2006 10:37:47 -0800
Everybody, before he takes it down, go see:
http://members.lycos.co.uk/fiultra/KISS%20191B%20by%20Andre%20Jute.htm
It's our perennial unintentional barrel-of-laughs guy trying to pass
off as an Electrical Engineer.
and here's the punchline:
"The quiescent operating point of a transistor is Iq and it is found as
the square root of the theoretical power divided by twice the load. The
load in our design is the 8 ohm speaker.
Iq = SQRT(P/2RL)
Take the square root of 30/16 and discover that the biasing current
should be set to 1.37A. The theoretical highest signal is the available
input times the voltage gain or 22V, which is also the voltage we
expect from the power supply, so the bias resistor must be 16 ohm and
it will dissipate 30W so we should use a 100W component, which itself
will require a substantial heatsink."
How many bloopers can you spot in those few lines? Confusing DC
biasing versus AC swing? Using the wrong endpoints for the resistor?
Calling a resistor what it is most definitely not, a constant-current
source? Suggesting there's going to be crossover distortion in an
op-amp with 60db of feedback? Suggesting a resistor is going to fix
this?
One might consider faking it in an area that is more forgiving, say
Numerology or Weather Prediction.
.
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