This revision does not require uA726 anymore. a custom circuit using CA3046 is used as a heated matched transistor pair.

Two independent voltage controlled oscillators, continuously tunable from 5Hz to 20kHz (applied control voltages can extend limits to .1Hz and 30kHz). Each oscillator has two processing inputs and a frequency modulation input. Waveshapes as well as frequency can be voltage controlled. Model 258 Dual Oscillators feature low sine wave harmonic content, negligible settling error, and high short and long term stability, even with rapidly changing ambient temperatures. 

Waveshapes can be varied from sine to saw (osc1) and sine to square (osc2)