This crystal oscillator is indicated for the calibration of IF steps of common radio receivers. The transistor admits equivalent as 2N2222 or BF494. The circuit is from an old American publication.
This circuit, suggested by an Electronics World of 1969, keeps a blinking LED for a while when a...
This circuit can be used to receive the signals from the CB17017E by applying them to an...
This circuit, which can act as a shield, was found in a 1970s American documentation. The...