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Topic: VLF transmitter Skelton

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	Science Fair Projects - List of masts
		Radio masts for VLF, LF and MF often act directly as aerials and are therefore often insulated against ground.
		For high power transmitters in the MW range, masts with lengths around half of the radiated wavelength are preferred because they focus the radiated power better to the ground than constructions with heights of quarter wavelengths, which are preferred of economical reasons for low power medium wave transmitters.
		For longwave transmitters, however, the construction of masts with heights of half-wave wavelength is, because of economical reasons (and perhaps problems with the flight safety), in most cases impossible.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/TV_masts (1517 words)

	Observing the Ionosphere with VLF Radio (Site not responding. Last check: 2007-10-14)
		VLF radio waves are partially reflected and partially absorbed by the lowest region of the ionosphere (the D-layer), which begins at about 40km altitude.
		The amount of scintillation is portrayed by the thickness of the signal trace, and varies constantly - slowly waxing and waning, presumably as patches of turbulent ionosphere drift across the path of the signal.
		During a solar flare, the upper layers of the ionosphere are bathed in X-rays, causing extra ionisation, and thus affecting radio propagation.
	www.abelian.demon.co.uk /sid (2446 words)

	Skelton, Yorkshire - Definition, explanation
		Skelton is a village four miles (6 km) northwest of the City of York, England, west of Haxby, and on the east bank of the River Ouse.
		Skelton was in the Ancient Forest of Galtres.
		Skelton was made a conservation area in 1973.
	www.calsky.com /lexikon/en/txt/s/sk/skelton__yorkshire.php (162 words)

	[No title]
		Re shortwave transmitter models: The Transmitter Documentation Project list for Cuba can be found at http://www.tdp.info/cub.html Years ago somebody reported that he managed to get to the door of the transmitter hall at Bauta, and from there he saw the BBC's, the Funkwerk Köpenick's and I think also the Soviet transmitters mentioned by TDP.
		I understand that the Funkwerk Köpenick and Siemens transmitters are utility units and were used for the SSB transmissions meanwhile cancelled by RHC.
		In the meantime these transmitters were scrapped, and the picture reveals that the two 50 metre masts once used as antennas for the 20 and 5 kW Lorenz units are gone, too.
	www.worldofradio.com /dxld3206.txt (11388 words)

	Encyclopedia: VLF transmitter Skelton
		The VLF transmitter Skelton is a VLF transmitter near Skelton run by Merlin Communications Ltd. in order to transmit coded orders to submarines.
		It uses as aerial a 365 metre high guyed steel framwork mast, which is insulated against ground.
		The VLF transmitter Skelton went in service in 2001 and is the predonator of GBR at VLF transmitter Rugby, which was shutdown on April 1st, 2003.
	www.nationmaster.com /encyclopedia/VLF-transmitter-Skelton (128 words)

	DX LISTENING DIGEST MARCH 2003 ARCHIVE (Site not responding. Last check: 2007-10-14)
		By the further Beitrieb of the short wave transmitter Moosbrunn both the chances of the digitization of the short wave and the employment of the short wave for crisis periods become secured.
		A demo call was made thru a mobile service operator, and the recipient of the call describes the transmitter and receiver boxes in his car.
		Transmitters were destroyed on Wednesday night Sky reported which has isolated the city from communications with Baghdad.
	www.w4uvh.net /dxldtd3c.html (15494 words)

	RDF_project
		You get a maximum reading when the plane of the windings aims toward the transmitter and a minimum reading when it is 90 degrees away from this.
		In this position, looking through the aperture of the loop you would see the antenna of the transmitter, which is presumably a rare event...
		Accuracy is most important as small reading differences often result in a deviation of the calculated transmitter location of up to hundreds of kilometres.
	www.uni-bremen.de /~ews2/RDF_project.html (898 words)

	Subterranea Britannica: Sites:
		The VLF aerial is slung between three 600ft self-supporting steel towers and anchorages built on the top of an adjacent steep hill (by comparison the VLF aerial at Rugby employs twelve 820 ft. lattice steel masts).
		It is understood that Criggion's HF transmitters were taken to Ongar and Rugby radio stations after they were no longer required at Criggion.
		The freestanding towers are equipped with staircases; the guyed masts have lifts, described as 'a cage with a lawnmower motor'.
	www.subbrit.org.uk /sb-sites/sites/c/criggion_radio/index2.shtml (770 words)

	[No title]
		The transmitter will be shipped next month and, after conversion work to double its output power and remedial work to the antenna system have taken place, we aim to have it operational by mid to late Summer 2005.
		Whilst the transmitter will be owned by us, it will be operated and maintained by former engineers at the (until now) redundant site.
		The used transmitter tubes, which are still very expensive, are sent to the US manufacturer, recycled, and reused.
	www.worldofradio.com /dxld5007.txt (11722 words)

	RA305 - Report on the Spectrum Audit of the Band - 9 kHz to 28 000 kHz
		There are plans to adopt T-DAB techniques within the HF bands for broadcasting services to improve reception, however, a number of International Telecommunication Union (ITU) World Radio Conferences have been unable to agree plans for the band and as a result many services operate outside of any internationally adopted plan.
		NATS joint use of 3 413 kHz and 3 476 kHz using transmitters located in the Republic of Ireland.
		NATS joint use of 13 264 kHz, 13 291 kHz and 13 306 kHz using transmitters located in the Republic of Ireland.
	www.ofcom.org.uk /static/archive/ra/publication/ra_info/ra305/ra305.htm (7896 words)

	[No title]
		The transmitter plugs into the top of the unit and draws power from the iPod's battery, so there are no wires to power the transmitter.
		To use the iPod transmitter, you find an unused channel in the FM broadcast band, set the transmitter to that channel, and voila, you are broadcasting your music collection on the air.
		(I wouldn't actually call it "broadcasting" because the transmitter's range is about 10 feet.) Living on the highest ridge in the county and smack dab in the middle of the New York-Boston metroplex, finding an unused channel on the FM band is not easy.
	www.worldofradio.com /dxld4095.txt (12377 words)

	STRS (Site not responding. Last check: 2007-10-14)
		The Project was a winner of the Minister of Defence Procurement’s Smart Acquisition Award for 2004 in recognition of the way it had pushed the boundaries of PPP through innovative contracting, and novel on-balance sheet financing and cost structures, as well as delivering benefits through release of Service Personnel to the Front Line.
		The VLF Submarine Communication Service is being provided by Alert Communications (a consortium led by VT Communications) as an end-to-end VLF received signal service to RN Submarines under an innovative PFI contract.
		Alert provide the service through one new (Skelton) and one updated (Anthorn) transmitter site and provide the receivers on all submarines.
	www.mod.uk /dcsa/organisations/strs (864 words)

	The Listener's Guide - Bob Ellis - The World Of Bobbin (Site not responding. Last check: 2007-10-14)
		Your penman was in the ham radio business for more years than was good for him during which time he sold many rigs.
		The new RFI transmitters at Allouis are sited underground, directly below the antennas they feed.
		One of the bands tipped to be the most crowded as the major powers, both political and radiated, fight for frequencies.
	www.aoruk.com /guide/g6.asp (2111 words)

	Bibliography (Site not responding. Last check: 2007-10-14)
		A miniature transmitter suitable for telemetry of a wide range of biopotentials.
		Sperry CJ (1968) Implantable stimulator and transmitter for telemetry of evoked potantials during defensive behavior.
		Renzema M and Skelton DT (1990) The use of electronic monitoring in the United States: 1989 update.
	www.datafilter.com /mc/c_fotfBibliography.html (14656 words)

	[No title]
		HI all...just a small protocol suggestion that will help everyone sort out the traffic...if we could all put the word "glowbugs" as the first word of the subject line, it would make sorting much easier....I'm going to to put this request as the last line of all my messages for the next little while...
		First off, regarding QRP and what it is. Let me propose a defintion (and if there is a better one I more than happy to hear it and let it be the one used).
		QRP is the achivementof high quality two way radio transmissions through the use of simple but efficient curcuit designs for both the transmitter and receiver.
	www.mines.uidaho.edu /ftp/pub/Glowbugs/GBdigests/glbugs1.dig (14998 words)

	[No title]
		Everything needs to be bigger - the transformer, (read $$), the power line feed, fuses, caps, rectifiers, etc. Now, in a typical ham supply, this is not a serious consideration, but ask the power companies what happens to the stability of their system when customers place many chokeless power supplies on the AC lines.
		Back in the WWII days, when my OM was doing radio work at the University of California War Research Lab, Point Loma, they used to use BC-221 freq meters as transceivers around amongst some of the fellers there by keying in the antenna lead.
		Using low plate voltages on detectors and audio tubes usually requires that good throttle control of regeneration be had AND some means of adjusting the feedback ticklering turns is usually advantageous.
	www.mines.uidaho.edu /ftp/pub/Glowbugs/GBdigests/glbugs5.dig (10619 words)

	[No title] (Site not responding. Last check: 2007-10-14)
		At the time it was simply too expensive for many economies in the area to erect the required FM transmitter sites, particularly in more remote regions, and so shortwave became the king of the airwaves for countries in Latin America, Africa and Asia..
		Another Peruvian station that is keen to receive reception reports of their new 2kw transmitter was recently mentioned by Daniele Canonica in Switzerland on the Hard Core DX email discussion group.
		The reason radio was used in the first place, was to reach the places where news was sparse, printed communications were difficult and people had no good way of remaining in contact with others in the outside world.
	members.lycos.co.uk /chrisbrand1977/id24_m.htm (8902 words)

	[No title]
		In fact, for really BIG transmitters, multiphase power is generally used (usually 6 phase) to minimize the filtering requirements.
		The reason for that is that a power supply for an SSB transmitter should be a constant voltage source, not a constant current source.
		Barry's other point about the choke smoothing out the load presented to the diodes is also correct and as he points out, is especially important when using tube rectifiers vs solid state diodes.
	www.mines.uidaho.edu /ftp/pub/Glowbugs/GBdigests/glbugs3.dig (10502 words)

	List of masts -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-14)
		Radio masts for (3 to 30 kilohertz) VLF, (30 to 300 kilohertz) LF and (300 to 3000 kilohertz) MF often act directly as (An electrical device that sends or receives radio or television signals) aerials and are therefore often insulated against ground.
		For (Click link for more info and facts about longwave) longwave transmitters, however, the construction of masts with heights of half-wave wavelength is, because of economical reasons (and perhaps problems with the flight safety), in most cases impossible.
		For frequencies below longwave the masts have to be electrically enlarged by coils or structures on the top, because the required heights for masts of even quarter wave length are too high.
	www.absoluteastronomy.com /encyclopedia/L/Li/List_of_masts.htm (6029 words)

	The Mechanisms of an Oppressive State: Parrt 1
		While other BT Stations are known to be Criggion near Shrewsbury (VLF); Ongar in Essex (Transmitter site); Leafield near Oxford (Transmitter site); Bearley near Stratford upon Avon (Receiving) and Somerton near Taunton in Somerset (Receiving)
		A new secure communications link was built in early 1980’s between Croughton and Cheltenham with new relay stations built at Leafield, near Stratford upon Avon; Little Rissington; Cleeve Hill, near Cheltenham and GCHQ itself);
		USN VLF, part of MEECN (Minimum Essential Emergency Communications Network in 1980’s
	www.informationclearinghouse.info /article4463.htm (14505 words)

	ShortWave Radio Stations around the world!
		Broadcasters are listed by Call Letters, Frequency/Power Output, City, Country.
		There are no duplications below, each entry represents a transmitter.
		Several transmitters with the same Call Letters is not uncommon.
	www.vmgworldwide.com /ShortWave.htm (199 words)

	QRP-L Mailing List (thread) (Site not responding. Last check: 2007-10-14)
		Antique Radio Station, TMPS and Show and Tell event, Craig J. Sterling,
		Re: Antique Radio Station, TMPS and Show and Tell event, Stan Skelton,
		surface mount "Micronaut" kit has arrived :-), Stan Skelton,
	www.kkn.net /archives/cgi-bin/mnav.cgi?a=QRP-L&m=1996-07&d=prev&t=t (1885 words)

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