Found in 969 documentation, this circuit generates sweep signals from 1 Hz to 100 kHz. The components used are from the period, and equivalents can be used.
This circuit sensor is an NTC with a resistance of the order of 2k. The SCR can be from the TIC...
The load current can be adjusted up to about 1 A. The transistor can be TIP32 or TIP42. The...
This oscillator with common general-purpose transistors appeared in Radio Electronics magazine in...