Training film The Wizardry of Wireless, on radio transmission and reception. View of a diagram with Grid Potential written on it. The oscillating action causes the antenna current to alternate. Alteration depends on turns of wire in the coil. Man demonstrates the direction of current flow on instrument. Animated picture of the electromagnetic waves from a tower. The transmitters are connected and antenna current passes through them. Diagram with sound waves, battery and the transmitter.
This historic stock footage available in HD video. View pricing below video player.
Type | Size | Price (USD) Comprehensive All Media License |
Price (USD) Digital-Only License |
---|---|---|---|
HD Master, Broadcast-ready (1920x1080, unmarked) | 4009 MB | $275.00 | $79.00 |
HD Screener (1920x1080, full-res with timecode) | 4009 MB | FREE or $4 (see below) | FREE or $4 (see below) |
Proxy (320x240, low-resolution, watermarked) | 64 MB | FREE or $4 (see below) | FREE or $4 (see below) |