Buckwalter Len. Easy-to-build Transistor projects

New Augusta: Editors and Engineers, Ltd., 1965. — 96 p.Easy Transistor Projects is a goldmine for hobbyists in several fields... Check out the theremin. Use the multivibrator for a timebase. Modify the flip-flop to switch crossing signal LEDs. Build the miniature radio receivers & transmitters. Customize them for your band of interest. By changing bias resistors, you can often make silicon transistors work in germanium transistor circuits. Most circuits in the book only use one base resistor. To use a silicon transistor, you must increase this resistor. Suppose that you choose a 2N2222A or 2N3904 transistor. Then the base resistor value should be about 400 times the collector resistor value.