This circuit was found in a 1966 General Electric documentation. It makes use of direct contact water sensors and therefore requires an isolation or low voltage relay drive transformer.
This circuit amplifies signals from 10 MHz to 500 MHz with a gain of 10 dB. We found it in...
The integrated circuit used is no longer very common today, but there are still many sources that...
This filter for interference generated by motors via the power grid was found in the June 1972...