This configuration was found in an American publication from the 90s. Operators admit equivalents just like transistors. The circuit does not require a symmetrical source.
This small telephone transmitter uses a telephone capsule as a microphone. The L1 coil has 4 to 5...
This circuit was found in an American documentation from the 1980s. The sensitivity ranges from...
This circuit produces a sinusoidal signal whose frequency can be calculated using the formula next...