Leigh 30

Leigh 30 is a colloquial term, primarily used within the electronics and amateur radio hobbyist communities, to refer to a specific type of power supply or electronic component with a characteristic impedance or voltage rating of approximately 30 ohms. The specific application and context determine the precise nature of the device.

While "Leigh 30" doesn't represent a standardized or universally recognized engineering specification, it often arises in situations requiring a matched impedance for optimal power transfer or signal integrity. It might, for example, describe a custom-built attenuator, a termination resistor, or a section of coaxial cable designed to present a 30-ohm load to a driving circuit.

The origins of the term are unclear, and its use tends to be informal, relying on shared understanding within specific technical circles rather than adherence to formal documentation or industry standards. The name "Leigh" itself is likely a local or personal identifier, possibly connected to the individual or group who initially used or popularized the term within their community.

Because of its non-standard nature, using "Leigh 30" in formal engineering documentation is strongly discouraged. In professional settings, it's crucial to define components and specifications using universally accepted and unambiguous terminology, such as specifying the precise impedance in ohms and the relevant power handling capabilities.