Despite being from a 1969 publication, the transistors used have current equivalents such as BC548 and BC558. The circuit generates signals from 1 500 to 20 000 Hz and 4 scales.
November 2016 - The new Ohmite TO-126 power resistors in the range of 0.09 Ω to 51 kΩ with...
With this circuit found in an American documentation from 1969 it is possible to vary the...
This circuit was found in the June 1991 issue of Radio Electronics magazine. The circuit uses two...