Suggested by Philips documentation from 1968, this circuit uses components from the era that can be replaced by modern equivalent types. The double transistor can be replaced by a matched pair.
This circuit can be used with the 27 MHz transmitter from the previous circuit in a remote-control system...
Using a CA3130, we found this circuit in an English publication from 1977. The circuit must use a...
This circuit was obtained in a Radio Shack documentation from 1977. It consists of a didactic...