This 3-tube circuit was taken from the 1975 RCA tube manual. The circuit is powered by the mains power and with switch changes it can have more channels.
Tube intercom (T1542E)
- Details
- Written by: Newton C. Braga
This 3-tube circuit was taken from the 1975 RCA tube manual. The circuit is powered by the mains power and with switch changes it can have more channels.
