This circuit is used in VHF and UHF superheterodyne receivers. The circuit is from the 1964 RCA transistors manual. Equivalent transistors such as the BF495 can be used.
This configuration makes use of an integrated circuit of the time having been found in a 1976 NASA...
This traditional version of timer was found in an old English publication. The relay must be of a...
This type of circuit is traditional and has been published several times in different forms and...