The third component is a circuit board (400) mounted to the base plate bottom portion (202) in the interior space of the beacon (100).

Typically the input stage comprises a long tailed transistor pair amplifier, the control current being fed to the tail of the pair.

An electronic current interrupter included in a DC distribution system contains a transistorized power circuit (EK), a threshold circuit (JF), a time circuit (TK) and a holding circuit (HK).

A method is also provided for monitoring and controlling current flow in an integrated RF transistor within an RF transistor cicuit.

Instead, the solid-state circuit is used, which is very effective and which does not have the size, weight, noise and increased current of the alternator arrangement.

One is operated by a piece of wire or a bimetallic strip which expands and contracts as it is heated by the current; the other is a relay operated by a transistorised circuit.

There is no need for the size, weight, noise, mechanical wear and current draw of using a motor and alternator as pretty much the same performance can be produced by the solid-state circuit with no moving parts.