How to Make a Signal Generator| Learn to Generate Electrical Signals : 5 Steps (with Pictures) - Instructables
1kHz Sine Wave Test Tone Signal - YouTube
1KHZ Sine Wave Generator Circuit under Repository-circuits -21142- : Next.gr
A circuit for generating 100 Hz or 1 KHz square wave signals – Matt's Tech Pages
Low Distortion Audio Range Oscillator 1khz Sine Wave Signal Generator Ultra Low Distortion -124db For Harmonic Distortion Test - Instrument Parts & Accessories - AliExpress
RF Signal Generator, 9 kHz up to 6.1 GHz | Berkeley Nucleonics