We found this circuit in a 1965 Electronic Design. The transistors are from the era, and modern equivalents can be tried out.
This circuit uses the Linear Technology LT6505 and was found in a 2005 manual. The circuit is for 24 V...
This circuit provides a linear attenuation of a signal up to 100 dB. The circuit operates with...
This configuration similar to many of this site was found in 1965 General Electric documentation. Modern...