GRETZ AERO WARNING TONE GENER.

The Gretz Aero GA-TB2 puts out an audio tone with a closure of contacts in a user installed switch, or an internal switch in a device like a clock or other device. This contact closure switch can be used to supply + voltage to the Tone Board, or the switch can be used to supply a ground source for the Tone Board. It is your choice.

As you can see in the photo, the Warning Tone Generator is very small. It can be mounted to any flat surface with the two supplied screws through the circuit boards mounting holes. To insulate the circuit board from ship ground there are two provided stand offs to be placed between the backside of the circuit board and the conductive structure it is mounted on. Connection of the wires to the circuit board has been simplifed from the earlier design by the use of a terminal block attached to the circuit board.

The GA-TB is designed to work with 12 volt systems. If you want to use this board on a 24 volt aircraft system, it can be done by use of a user supplied and installed heat sink to the voltage regulator on the board. The circuit is also now designed to operate in a greater temperature range (-40 degree C to +125 degree C) than the much earlier design.

The GA-TB comes with instructions for mounting and installation.

• Weight: 1/4 ounce
• Length: 1 1/4 inches
• Width: 1 1/4 inches
• Tone: About 800 Hz continious while power is applied
• Operating Temperature Range:-40 to +125 C