We found this universal preamplifier circuit in a March 1994 Electronics Now. It has several types of equalization depending on the signal input.
Found in a 1967 manual, this circuit uses transistors from the era to generate a linear ramp...
April 2017 - The new Alps UGMZ2AA Bluetooth communication modules can be found on Mouser...
This was a very popular instrument in the workshops of the 60s and 70s. It was a "top of the line"...