Found in a 73 magazine from the 1980s, this circuit generates signals from 3.2 to 22 MHz. FETs can be general-0purpose current types. No information about the coils is given.
Voltage comparators, such as those in the LM139 / 239/339 series, consist of devices that can be...
The assembly of this circuit was described in the January 1977 issue of Radio Electronics...
This circuit was found in a 1977 Signetics manual. The 556 consists of a 555 double and the...