This preamplifier circuit for turntable cartridges was found in the March 1994 issue of Electronics Now magazine. The circuit is suitable for magnetic cartridges.
This circuit using an operational amplifier was found in old American documentation. It can be...
If the circuit oscillates, emitting sound, it is because the transistor is good. This simple...
Like the previous circuit, this is used in the analog part of the telephone lines. The same...