Heathkit ET-3100 

Power supply section with positive and negative controllers 1-15 range, positive, negative and ground terminals.

Line frequency section has 3 terminals, two at 15VAC and one at 30VAC.

Generator frequency section with frequency controller and high/low range switch
	low frequency range 100Hz - 2 KHz
	high frequency range 2 kHz - 20 kHz

Terminals for sine, square and ground.

Main socket terminal has 8 rows of 48 slots with 1 kohm controller on right which has 1,2,3 terminals also.

Fuse compartment is on left side.

Main on/off switch with red LED is on top right left.