This circuit allows you to simulate an analog telephone line for the repair and testing of devices. The circuit is from 1994 and all the components used are common.
The coils of this simple mid-wave radius are wound 28 or 26 on a 12 to 30 cm long ferrite rod and the...
In the figure we have a battery charging circuit for currents up to about 5 A. In series with the...
Found in 969 documentation, this circuit generates sweep signals from 1 Hz to 100 kHz. The...