This modulated transmitter for a light beam communication system was found in the 1991 Electronics Experimenter Handbook. The circuit modulates a LASER diode.
This circuit makes the RIAA equalization of signals obtained from a record player for recovery in other...
This is a diagram of a 1958 commercial receiver. The circuit was found in documentation at the...
This circuit uses an 18 MHz crystal to generate 36 MHz signals. We found it in an 80's...