Based on an LM36000 OTA this circuit was found in the July 1988 issue of Radio Electronics magazine. It covers frequencies in the range of 45 Hz to 45 kHz.
The circuit is from the 1990 Motorola Linear Databook, but can be implemented with other operating...
This mechanical reverberator circuit for guitar was found in the February 1970 issue of Radio...
The battery charger shown in the figure uses two 60 W incandescent bulbs in series to limit the...