This circuit was found in the August 1993 Electronics Now magazine. It is for telephones used on common old-style analog lines.
This continuous wave transmitter (CW) can send signals in the 30 to 100 MHz band, depending on the...
Relays specially designed for operation in harsh environments of Phoenix Contact can be purchased...
January 2017 - Pulse Electronics ER11 transformers with high insulation can be obtained from...