For Sale: Heathkit Model IG-5282 Sine & Square Wave Generator. The Heathkit IG-5282 generates sine waves and square waves from 10 Hz to 100 Khz. The output level is adjustable from 0 to 3 volts peak. It operates off of two internal 9 volt batteries. Great for testing and troubleshoot audio and digital circuits. Nice condition $65 with free shipping to the lower 48 states. fsphotos@comcast.net