Volume Expander and Compressor (T887E)

This 3-tube circuit was found in a 1944 publication. The circuit does not include a source and has the function selected by a toggle switch.

CA3080 Amplitude Modulator (CB25134E)
This 2-quadrant modulator circuit was found in the May 1988 issue of Radio Electronics magazine. The...
100 kHz Clock (CB6465E)
This circuit is from a Ferranti publication of 1968. The circuit generates a signal according to the...
Divider with SUS (CB6819E)
This frequency divider with SUS was found in General Electric's 1967 documentation. Similar...