This amplifier was found in a 1970s documentation. Darlington transistors can be replaced for modern equivalents of at least 80 V x 2 A, equipped with good heat sinks.
This circuit was originally found in a Philips documentation from 1969. It is intended for sensing...
Found in an American publication from 1969, this circuit can be adapted to be used as a shield....
This low-noise hydrophone circuit was found in a 1980s Linear Technology component manual. The...