Boonton 1100 Audio Oscillator, 20 to 50 KHz
		Boonton 1101 Stereo Modulator.
		Krohn-Hite 3202 Variable Electronic Filter, 20 Hz to 2Mhz.
		Krohn-Hite 3905 W/2 model 30 filter plugins Multichannel Filter mainframe.
		Krohn-Hite 4200 Test Oscillator, 10Hz to 10MHz
		Krohn-Hite 4200A Test Oscillator, 10 Hz to 10 MHz. 10V rms. +20 to -50dB, 10dB/Step.