This old circuit, found in a 1945 documentation, uses a carbon microphone and high impedance headphones. The battery can consist of two cells. Range is limited by cable losses.
Simple Intercom (T985E)
- Details
- Written by: Newton C. Braga
This old circuit, found in a 1945 documentation, uses a carbon microphone and high impedance headphones. The battery can consist of two cells. Range is limited by cable losses.
