This full-wave dimmer with SCRs was found in General Electric documentation from 1965. The circuit uses a unijunction and serves only for incandescent lamps.
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...