Talk:Longwave
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[edit] Royal Navy subs
...monitoring 198 kHz. This claim, I think, needs qualifying with an "allegedly" or two. See The Today programme. Don't know -- seems to me like an adroit terrorist group could provoke a nuclear holocaust simply by taking out Droitwich (or Daventry?). –Hajor 20:41, 18 May 2004 (UTC)
- I am also sceptical of the usefulness of this approach during peacetime, because subs have two-way VLF radio communication. In a crisis, when subs need to maintain complete radio silence, the British authorities could set up military exclusion zones around the three transmitters (Droitwich, Burghead and Westerglen) and such an approach might be more likely. (I suspect Burghead and Westerglen would be switched off in such a situation - subs probably have better receivers than the average Scottish household!). Rugxulo 22:11, 19 January 2006 (UTC)
[edit] Canada
I don't know that Industry Canada has allowed "LowFER" in Canada - can anyone find a cite for this? I'll have to check the IC Web site, maybe it's there...--Wtshymanski 13:32, 3 Jun 2005 (UTC)
[edit] Defunct long wave broadcasts?
I seem to recall reading an old issue of Practical Wireless from the 1970s which listed long wave broadcasts from Central Asia that were well into the 300's of kHz. Did these broadcasts exist? If anyone has firm information it would be an interesting addition to the article. Rugxulo 22:11, 19 January 2006 (UTC)
[edit] In light of this article,
http://www.eurekalert.org/pub_releases/2006-02/su-rgf021706.php someone might want to re-evaluate the statement in the first paragraph of this article about how "longwave signals do not reflect or refract using the ionosphere."
The linked article says "Scientists detect these localized disturbances with VLF radio waves propagating along the Earth's surface. The ionosphere, like a metal, is a good electrical conductor. It acts as a guide for radio waves. That's why the Earth's curvature is no barrier, as VLF radio waves bounce off the ionosphere and can propagate to long distances around the globe, in the so-called Earth-ionosphere wave guide."
I realize that most lowfer xmissions use groundwave prop, but why would signals longer in wavelength than HF not also reflect from the ionosphere?
[edit] Relation to LF and MF articles
I've attempted to clarify the relationship between this article, and the LF and MF articles. The situation is still not very good, however; for example, information on longwave amateur bands is in LF, whereas information on LF commercial stations is in longwave. Some kind of merger seems to be in order, but I don't know the best way to handle that, given that the bands don't exactly match. — Johan the Ghost seance 10:25, 11 May 2006 (UTC)
[edit] Clarkestown at night
This article claims that RTÉ off Clarkestown decreases its power at night. Now, as far as I can tell and remember (I live fairly close to the mast), in its Atlantic 252 days, Clarkestown operated 100kW daytime and 500kW nighttime. The station engineer I talked to also said the Radio Algeria transmitter went off-air over night. Obviously, even at the suggested power here, I'm not gonna be able to check the Radio Algeria transmissions without some very, very impressive sheilding :p There were reports back in the early 1990s of it being received in Brazil at night, which would suggest it had a clear channel.
Also, I've since been told that RTÉ now operate it at max. 300kW for simple cost saving reasons - they don't need a music quality signal across the entire UK; however would have thought that its still 100 day, 300 night. The site can actually operate at 600 but has no ITU clearance for such. --Kiand 03:12, 27 June 2006 (UTC)
