You could definitely do that if you wanted to, but you might run into a few different issues: 1) More components mean more points of failure. 2) The resistance of a BJT changes with its temperature. Run high current through your circuit or have something warm nearby and your resistance will change as the chip heats up. 3) You have manufacturing/process variation on all components. The size of your caps/inductors, resistors, and BJT parameters change from component to component. Once you wire up your design and tune it, your tuning parameters will work ONLY for that one circuit. The only way to reduce/eliminate individual tuning is to get space grade components with extremely high process tolerances…which will end up making your replacement for the $2 chip $30+.
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