The HV2405E integrated circuit is not very common these days. This circuit was found in the August 1998 issue of Electronics Now magazine. The current is a few tens of milliamps.
This two-output circuit was found in General Electric documentation from the 1990s. The circuit uses...
This Baxandall tone control was obtained in an Argentine publication from the 70s. The circuit uses...
This circuit is from Radio Electronics from March 1985. The circuit uses common components at the...