This an old commercial receiver found in a year 1958 magazine. The circuit uses some transformer available that timer and the transistors are germanium types. The circuit is intended to receive MW stations.
Found in a 1980s documentation, this amplifier uses an integrated circuit that is not easy to...
The circuit shown fires an auxiliary flash from a flash commanded directly by the camera. The sensor...
In the original circuit a 40431 quadrac is used, but this is not a common component today....