E)
This soft start dimmer was found in a Motorola documentation from 1968. However, it can be implemented with modern equivalent components like the 2N2646 for the Unijunction.
We found this oscillator in a documentation for radio amateurs from the 1970s. The circuit can use...
Many oscilloscopes have high impedance inputs that make it difficult to observe high frequency signals...
This is the receiver for the previous circuit we found in the December 1992 Radio Electronics...