CIRCA 1970s - This 1970s clip explores the vacuum tube and demonstrates how it revolutionized communication systems.

Name: Circa 1970s This 1970s Clip Explores
Uploaded: 2019-06-19T00:00:00.000Z
Duration: 53 s
Channel: Rick Ray
Description: CIRCA 1970s - This 1970s clip explores the vacuum tube and demonstrates how it revolutionized communication systems. Stock Footage Video (100% Royalty-free) 1031627630 | Shutterstock