This report describes tests on five samples of the type 4126 capacitor microphone made by Standard ... 4108 instrument but employs a field-effect transistor instead of a valve in the head amplifier.

A Mighty Mite is barely a radio at all. One transistor, capacitor, crystal and inductor in the form of a bunch of wire wrapped around a pill bottle form a minimalist oscillator, and then by keying ...

In addition to a coin cell holder (which serves as the construction base), you need a transistor, two resistors, three capacitors ... drill bit), and an electret microphone.

Most modern electronic devices consist of several key components: transistors, capacitors, resistors, inductors and diodes. Often, they are supplemented by additional components like crystals and ...