This circuit is from Mullard 1969 documentation. The circuit operates at a relatively high supply voltage and has a 10 Vpp output. The transistors are of the time, but admit equivalents.
This circuit with RIAA equalization is from 1985 US documentation. The circuit has a flat response...
January 2017 - Mouser Electronics has announced the availability of Pulse Electronics' new...
This circuit was found in an American documentation from 1977. The mechanical resonator or ceramic...