A stable 1,000-cycle tone generator

The circuit of this 1,000-cycle transistor oscillator has a high degree of amplitude stability achieved with a circuit simplicity that results in small size, low cost, low power consumption, and high reliability. Transmission characteristics are such that the output amplitude will not vary by more than 0.03 db over the temperature range of 40 to 120 F and over a supply voltage range of ±10 per cent of nominal