This Vienna bridge multi-band oscillator circuit was found in a 1974 Ferranti transistor manual. The circuit generates signals from 25 Hz to 1 MHz in 5 bands selected by the capacitors.
The circuit shown was found in the 1994 National Semiconductor Linear Applications Handbook. The...
We found this circuit in a documentation for radio amateurs from 1975. The FET can be the BF245 and...
This circuit is from an old documentation making use of a 3,579,645 MHz analog color television...