The transmitter’s design is about as simple as can be: one tube serves as a crystal-controlled oscillator, while the other tube acts as a power amplifier to boost the output. The tiny ...

To check, remove the power from the amplifier and see whether the problem ... This is likely to happen if you live close to a transmitter. Attenuators can be used to decrease the incoming signal ...

An AM transmitter is simple enough, in this case an oscillator and buffer driving a class C power amplifier. The modulation is applied by a transistor in series with the power amp, driven from an ...