Electronics Research Laboratory
historic site
- Built
- 1970-05-02
- Inscription
- Original site of the laboratory and factory of federal telegraph company, founded in 1909 by Cyril F. Elwell. Here, with two assistants, Dr. Lee de Forest, inventor of the three-element radio vacuum tube amplifier and oscillator. World-wide developments
| Date | Sunrise | Golden hour | Sunset |
|---|---|---|---|
| March equinox | 07:13 | 18:46 | 19:21 |
| June solstice | 05:49 | 19:55 | 20:34 |
| September equinox | 06:57 | 18:33 | 19:07 |
| December solstice | 07:20 | 16:14 | 16:55 |
Local time (America/Los_Angeles).
37.44154, -122.15768
Elevation 15 m (modelled from terrain)