This interesting tube circuit came out in a June 1948 Radio Craft. The circuit uses the loudspeakers as a microphone and speaker at the same time. Range depends on cable losses.
Keyless intercom (T1274E)
- Details
- Written by: Newton C. Braga
This interesting tube circuit came out in a June 1948 Radio Craft. The circuit uses the loudspeakers as a microphone and speaker at the same time. Range depends on cable losses.
