This transmitter emits a modulated signal at a frequency given by the first transistor in the phase shift oscillator. The circuit is from an Australian publication from 1991.
This good power amplifier was found in a Japanese magazine from the 1970s. The circuit uses...
This circuit was found in 1960s Radio Electronics. The circuit uses components from that time. The...
This circuit for counting down pulses was found in the September 1983 issue of Radio Electronics...