Vacuum Tube Repeater, 1914
By Steve Cichorsky, ; posted January 25, 2009; hits 2462
 |
| Transcontinental Telephone Line- This was the vacuum tube repeater element used in the test conversations between New York and San Francisco |
By Steve Cichorsky, ; posted January 25, 2009; hits 2462
|
| Transcontinental Telephone Line- This was the vacuum tube repeater element used in the test conversations between New York and San Francisco |