This audio amplifier is a rugged instrument with inbuilt loud speaker. The input can be by 3.5mm phone jack at 15mV max., or by banana plug at 150mV max.

Output is either via loud speaker with speaker on/off switch or by 4mm sockets to an oscilloscope to view the output signal. The instrument is rugged enough to withstand student use.

The unit contains a 9V #216 dry cell, but can be powered also by 12V.AC PlugPak or from any low voltage power supply at 12V.AC or DC. For the larger model for 240V mains operation, see 0081001.