Low noise amplifier (T466E)

Found in 1948 MIT documentation, this 4-tube amplifier is characterized by its low noise level.

Basic Monostable with the 555 I (CB1295E)
This basic configuration can be found in a lot of articles on this site. In this case, the relay...
Residential Alarm No Break (CB17045E)
This circuit was found in a 1997 publication, but it uses few common components and is very...
Variable Filter (CB4600E)
This circuit prevents the passage of frequencies in a range starting at 1 kHz and can be adjusted...