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Spy Circuits
This covers all the possible combinations for the greatest output with three transistors using a 3v to 9v supply If you want to improve any of the circuits we have covered, here are some helpfui tips:
13. THIS DOESNT WORK
Some things that iooktheoreticaiiy possible, do not work in practice.
It seems obvious, to increase the power output from a transmitter, simply put two transistors in parał lei on the Unfortunately this does not work. The output does not increase. In addition, decreasing the emitter resistor or biasing does not produce a higher output.
A transistor has a set of parameters and certain capabilities. These have been provide for a reason. They are will get from the device.
Y
Transistors in parailel does not produce a higher output
HOW A CAPACITOR WORKS
lt's handy to know the effective reactance (resistance) of a capacitor at the operating frequency of the Circuit. 100MHz, the resistance is as follows:
|
Capacitance |
reactance @100MHz |
reactance @2kHz |
|
5.6p |
300R |
2011-12-08
mk:@MSITStore:F:\spy circuits.chm::/SpyCircuits-l.html
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