Timeline for Is it possible for underground bunkers on different continents to be connected?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 14, 2019 at 17:23 | comment | added | Starfish Prime | @Mr_road you can use radio from undergroun to surface, but literally only to the surface. See stuff like this: vollok.nl/docs/overview_english.html | |
| Jun 14, 2019 at 15:45 | comment | added | Mr_road | regarding short wave raidio, you could not use it underground to above but you could run a cable to transcieve above ground, then bounce signals around the world. | |
| Jun 14, 2019 at 15:43 | comment | added | Mr_road | Everything you say is true but I would see he main issue with HVDC after a massive war being the availability of components tobuild and repair the system. HVAC is much simpler and robust. | |
| Jun 13, 2019 at 17:52 | comment | added | puppetsock | en.wikipedia.org/wiki/High-voltage_direct_current High voltage DC has advantages for very long distance. When the distance becomes 1/4 wavelength at your AC frequency (round about 1250 km for 60 Hz) then your wire becomes an efficient radio transmitter and starts to really lose power to radiation. Plus there are other issues. The equipment to efficiently step up DC voltage is expensive, but could possibly be worth it. It is in use for various links in Europe. There are some in North America. More details in the link. | |
| Jun 13, 2019 at 17:41 | comment | added | puppetsock | I think maybe you would have to search around on wavelengths to get a wavelength that worked for being underground, and that got through whatever the nuclear stuff has left in the atmosphere. Subs, for example, use ultra-long wavelengths. The entire sub becomes the antenna and is usually 1/4 wavelength. Bandwidth is small so you probably only send text, and that slowly. | |
| Jun 13, 2019 at 17:28 | history | answered | Mr_road | CC BY-SA 4.0 |