Current to voltage converter (CB7332E)

This circuit is from a Popular Electronics from the 90s. The integrated circuit admits equivalents that must be tested.

250 mW amplifier MC1306P (CB20023E)
This amplifier uses a 1975 integrated circuit, which is uncommon today. The circuit has a gain of 30...
FET Astable (CB18252E)
Using junction FETs, a configurable configuration is achieved for very low frequencies. FETs can...
100 mA regulator (CB21168E)
This 2-terminal regulator was obtained from a 1990s National Semiconductor manual. The components admit...