Found in 969 documentation, this circuit generates sweep signals from 1 Hz to 100 kHz. The components used are from the period, and equivalents can be used.
This mechanical reverberator circuit for guitar was found in the February 1970 issue of Radio...
Found in an old English publication this circuit uses a dual gate MOSFET. Coils not specified....
This is the receiver for the previous circuit transmitter. Similarly, no information about the...