This circuit was obtained from Radio Electronics magazine, October 1987. The circuit uses a triac to control the heating element current. The transistors are general purpose.
This analog TV circuit can be used on a small transmitter. The circuit is from an 80's American...
This antenna or booster amplifier operates with signals from the midband (MW) range up to the VHF...
This circuit was found in a documentation for radio amateurs from 1978. The resonant circuit...