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Topic: AM transmitter Droitwich

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	Droitwich - Hutchinson encyclopedia article about Droitwich
		Droitwich lies on the M5 motorway and the Birmingham–Worcester railway line.
		The saline springs, or ‘wyches’, of Droitwich have been used since Roman times and are mentioned in the Domesday Book.
		Their medicinal properties were realized in 1830, during a cholera epidemic.
	encyclopedia.farlex.com /Droitwich (146 words)

	Droitwich (Site not responding. Last check: 2007-10-08)
		Droitwich Spa is a town in northern Worcestershire, England, on the River Salwarpe.
		There are of course plenty of pubs in Droitwich including The Fox and Goose, The Riflemans Arms, The Star and Garter, The Hop Pole, The Red Lion and The Castle.
		Edward Winslow, one of the Pilgrim Fathers was born in the town in 1595.
	www.getaccomodation.co.uk /droitwich_info.htm (706 words)

	Radio Rewind - Radio 1 History - Transmitters
		The transmission wavelength of Radio One was moved from 247m (1214 kHz) to 275 and 285m (1053 and 1089KHz) in November 1978 as part of a plan for BBC AM broadcasting in order to improve national AM reception, and to conform with the 1975 Geneva Conference on radio wavelengths.
		The use of two AM frequencies avoided the problem of interference due to nearby transmitters operating on an identical frequency.
		Droitwich (Worcs) 1053 and Brookmans Park (London) 1089 transmitter powers were increased dramatically on the new frequencies, by a factor of 5 and 4 respectively.
	www.radiorewind.co.uk /transmitter.htm (847 words)

	Longwave - Biocrawler (Site not responding. Last check: 2007-10-08)
		The earliest radio transmitters, including the Alexanderson alternator, were all longwave transmitters.
		In Europe, North Africa and Asia, longwave radio frequencies between 153 and 279 kHz are used for domestic and international broadcasting.
		One aerial of this kind was used by transmitter Orlunda in Sweden.
	www.biocrawler.com /encyclopedia/Longwave (1025 words)

	Droitwich transmitting station - Wikipedia, the free encyclopedia
		The Droitwich transmitting station is a large broadcasting facility for longwave and mediumwave transmissions, established in 1934 close to the village of Wychbold, near Droitwich, Worcestershire, England (grid reference SO929663).
		This transmission site is the location of the strongest long-wave transmitter of the British Broadcasting Corporation, which together with the two Scottish longwave transmitters at Burghead and Westerglen forms a network on the same frequency.
		The carrier frequency is controlled by a rubidium atomic frequency standard in the transmitter building, enabling the transmission to be used as an off-air frequency standard.
	en.wikipedia.org /wiki/Droitwich_transmitting_station (410 words)

	Frequency Finder UK - History of radio transmission
		A smaller 5 kW transmitter was opened at Penmon to bring the Welsh Regional Programme to North Wales and Aberdeen was replaced by a 5 kW transmitter at Redmoss.
		To combat this, the long wave transmitter was closed and the medium wave transmitters grouped into three synchronous groups of four on the same frequency.
		Seven transmitters opened in 1956: Divis for most of Northern Ireland, Meldrum for the Grampian region of Scotland, North Hessary Tor for Devon and East Cornwall, Blaenplwyf for West Wales, Holme Moss for North West England and Yorkshire, Sutton Coldfield for the Midlands and Tacolneston for East Anglia.
	mysite.wanadoo-members.co.uk /freq_find/trans_hist1.html (2271 words)

	Droitwich Spa - Wikipedia, the free encyclopedia
		Plans are currently being made to re-connect the Junction Canal to the Worcester and Birmingham Canal at Hanbury and to re-connect the Barge Canal to the River Severn at Hawford.
		Near Droitwich there is the central longwave broadcasting facility of the UK (Wychbold BBC transmitter), which is also used for transmissions in the medium wave range, Droitwich transmitting station.
		St Richard, Bishop of Chichester, was born in Droitwich in 1197
	en.wikipedia.org /wiki/Droitwich (1248 words)

	Chapter Two (Site not responding. Last check: 2007-10-08)
		The receiver measured the distance of the aircraft from the three transmitters, and as it was a purely pulse system, and one transmitter triggered the other it was almost impossible for the enemy to interfere with the accuracy of the system.
		The transmitter was a monster; with two large air-cooled transmitting tubes delivering several hundreds of Kws of power, operating at a plate voltage of over 15Kv.
		The transmitter van was a large four-wheeled trailer and the antenna was mounted on a mast at one end and could be turned by a large hand wheel from inside.
	userweb.suscom.net /~woudyet/RAF.html (21473 words)

	DX LISTENING DIGEST AUGUST 2003 ARCHIVE
		Among the complaints were that the program gave too much attention to accidental killings of soldiers by their own troops and to civilian casualties and that it gave too little prominence to successes, including the "strategic achievements" of the Australian troops, the ministry said.
		Perlavisión is in Cienfuegos city but it also uses the Santa Clara city transmitter tower on ch 5 from 4 to 5 pm and also during the same period of time Perlavisión also uses the Matanzas city transmitter tower on ch 13.
		Why am I not surprised that still on Aug 29, http://www.voiceofnigeria.org/frequency.html claims to be on 15120 with no mention of 17800.
	www.w4uvh.net /dxldtd3h.html (18891 words)

	Ross Revenge - Transmitter Room - Continental Electronics
		These transmitters were available as both medium wave and shortwave variants, with very little difference in circuitry, and many hundreds, if not thousands have been built and shipped around the world since the 1960's.
		I am unsure as to the exact release date of the 315/316/317B, but a good guesstimate would be 1957, a year after RCA launched the first ampliphase the 50G.
		An even later version of the 316, the 316F is generally regarded as being the finest sounding AM transmitter ever built, with exceptionally low distortion and noise levels and excellent phase characteristics.
	www.rossrevenge.co.uk /tx/continental.htm (3452 words)

	war games near droitwich (Site not responding. Last check: 2007-10-08)
		The Annual Meeting of 1895 was held at the Raven Hotel, Droitwich,...
		Near Droitwich are towns from which many of the Pilgrims set out to find...
		Medium-wave service from Droitwich was also in place before the war,...
	baqewo.tripod.com /war_games_near_droitwich.html (536 words)

	Ross Revenge - Transmitter Room - Ampliphase Ancestry
		The whole transmitter was essentially built into a single width cabinet, with the active components in the middle and metering panels and controls down both edges.
		BTA-10J transmitters were used by a number of UK offshore stations during the 1960's, notably Radio Scotland onboard the MV Comet with a pair of 10J's, Radio 270 onboard the MV Ocean VII and Radio 390.
		The 390 transmitter was later sold to the Mebo company for use onboard the Radio Northsea ship, and the 270 transmitter was acquired by the Captal Radio project onboard the MV King David.
	www.rossrevenge.co.uk /tx/ancest.htm (2496 words)

	[No title]
		I think many would believe (and I am NOT saying that Ed is, or is not, among them) that AM broadcasting QRM issues are just concerned with heavy interference to local signals.
		AM is already significantly compromised by powerline noise in suburbia.
		For the most part around here, AM is only listenable on the interstate highways where powerlines aren't overhead.
	www.worldofradio.com /dxld3157.txt (13217 words)

	Frequency Finder UK - Radio 1 transmission history
		Prior to launch additional Radio 1 transmitters were built for the Midlands; South Wales, Avon & Somerset; Southampton & Portsmouth; the Brighton area; the Norwich area; and Hull, all on 1214 kHz, or 247 metres as radios were calibrated in wavelengths on AM then.
		The transmitters serving the North, Midlands and South East were tripled in power and new high power transmitters introduced for the South West and the North East.
		Four transmitters were then ceremonially switched on through the day: Wrotham for the South East (replacing Crystal Palace), Tacolneston for Norfolk and Suffolk, Sandale for North East Cumbria and South West Scotland and Blaenplywf for Ceredigion and SW Gwynedd.
	mysite.wanadoo-members.co.uk /freq_find/r1_transmission.html (2137 words)

	analogBLOG
		At the BBC Droitwich transmitting station in Worcestershire, England, is a 400-kW (ERP) AM transmitter with its carrier set at a very accurate 200 kHz.
		During WWII, the transmitter was the main source of information for embattled Europe - reaching, as it did, to the South of France and deep into Germany, and carrying coded messages for the underground.
		The 50+ acre site houses the two transmitter buildings (the second for a MW transmitter with separate mast), the huge multiple-conductor T-aerial, and grass — lots of grass.
	analogzone.wordpress.com (1415 words)

	[No title]
		I am sure it was R. Litoral, because they gave an English ID (same as I recorded a few weeks ago on 4832).
		DRM members come from all sectors of the broadcast industry and include transmitter and receiver manufacturers, research organisations, national and international broadcasters and network operators.
		No doubt the transmitter is in a really bad shape, very same technical characteristics and procedure like on the 6900 transmission, identified by Olle Alm as typical for the Bulgarian Kostinbrod site.
	www.angelfire.com /ok/worldofradio/dxld1062.txt (5178 words)

	[No title]
		Perhaps I should start this with 'Where am I going?' It is now over two years ago that Bert G3RH1 suggested that we should try to give Coherent CW another go.
		More comprehensive notes are included with the transmitter boards than were given in RadCorn and details of a four watt amplifier are included.
		The transmitter if f the phasing type and uses readily obtainable 1 % resistors and capacitors for the phase shift networks and will transmit upper or lower sidebands as required.
	www.njqrp.org /ccw/ccw_news/CWN_IS13.TXT (1603 words)

	[No title]
		Tx staff at night after closedown, adjusted the transmitters and ATH's over the weeks leading upto the change and marked/noted the settings and modified equipment were problems existed, and the whole lot was retuned over one night, they also adjusted and relabled various programme feeds.
		Droitwich was not shut down, it's MF service became part of the single frequency network.
		It also transmitted propaganda programmes to Germany, using the LF transmitter which had been retuned to MF, and 200 KHz was abandoned, but reused after the BBC built a high powered transmitter site at Ottringham near Hull which had four x 200 KW transmitters and large antenna array pointing towards central europe.
	www.ureader.co.uk /message/731776.aspx (6855 words)

	Glenn Hauser's Shortwave/DX Report (Site not responding. Last check: 2007-10-08)
		WDBO Newsradio 580 AM in Orlando reported on its website Wednesday morning that the power company said that large parts of Kissimmee remain with power because part of the electrical distribution system was damaged.
		It may well be that the WOTS transmitter is in the area in which the distribution system was damaged; it could also be that the transmitter or tower were damaged or destroyed; or both.
		Our transmitter and studios do not have generator power, and Florida Power was going to voluntarily shut down all the power in downtown and evacuation areas so that their equipment would not be harmed.
	www.dxing.com /dxr/dxld4125.htm (13444 words)

	Karen's Page (Site not responding. Last check: 2007-10-08)
		This transmitter was designed more for stability than for range, so operates at relatively low collector current to minimise thermal drift.
		Remember that use of these transmitters may violate the laws of your country, and that harmonics might interfere with your neighbour's TV, etc. The onus is entirely on you to ensure that you are not breaking the law or causing a nuisance.
		Adjust the transmitter section tuning trimmer to place the sender's signal in a an empty part of the FM dial (if such a space can be found these days!).
	techlib.com /Karen.htm (4506 words)

	mb21 - ether.net - Transmitter Information (Site not responding. Last check: 2007-10-08)
		Until the mid-70s and the proliferation of independent local stations the vast majority of radio listeners used AM (MF, medium wave) rather than FM (VHF).
		The coverage provided by these transmitters may seem desultory but remember that the areas shown were the limit of night-time fading.
		It will be seen that these frequencies are very similar to those in use by existing wavelengths today, the present arrangements having been adopted after the major frequency re-shuffle of November 1978.
	tx.mb21.co.uk /info/bbc-am/bbc-am.asp (312 words)

	Aircheck UK
		There are 43 transmitters serving the British Isles - between 99.9 and 101.9 - six dotted around the coast of Wales, two in Northern Ireland, six in Scotland, one on the Isle Of Man, one on the Isle of Wight, and the remaining 27 across England.
		The 1970s saw the island's ministers making repeated requests for increases in transmitter power, but they were told that this could not be possible due to the fact that, with the newly established commercial mainland operators, such an increase could steal listeners away.
		This was due to the BBC's equivalent of the old IBA and subsequently RA's policy of not simulcasting on two frequencies and to encourage commercial radio on the AM band.
	www.geocities.com /thehotw/aircheck_UKNational.htm (9881 words)

	[No title]
		Due to the alarming increase in hate based radio, not only on shortwave, but on AM and FM as well, we at Radio For Peace International are inaugurating the first ever international campaign to bring awareness to and help stop this dangerous hateful rhetoric.
		The Droitwich site was built in the early 1930's and is considered to be one of the most important in the country because it transmits the Radio 4 long wave service.
		Thus the transmitter is still in use sporadically, but unless something else has happened during the past month, it is on the air some nights and off most others.
	www.angelfire.com /ok/worldofradio/dxld1059.txt (10536 words)

	[No title]
		I am using a 135.500 kHz exciter signal > fed by an audio frequency signal between 1850 and 2100 Hz to generate the > LF signal and I will try to keep my transmission as clean as possible.
		The Rugby transmitter building was > designed to minimise the amount of metal, etc. close to the loading > coils, while at Criggion, the loading coil was inside a reinforced > concrete building.
		It help demonstrate also how clean the Loran C transmitter is. I think it is time to freeze the design and let the rest of you start building a few.
	www.amrad.org /pipermail/lf/2001q1.txt (21488 words)

	[No title]
		For instance, I am looking at a simple GPS > locking scheme that will allow any frequency that is a multiple of 1Hz to be > locked giving very good long term stability, but poor short term over a few > seconds - suitable for long duration signalling purposes.
		Perhaps I am missing something, but as far as I can see, > the waveform will be symmetrical if the drive to each totem pole has a 50/50 duty > cycle and the modulation is done only by varying the phase between the totem pole > drivers 0 - 180 degrees.
		Talbot Andrew wrote: > I am now in a position to transmit GPS locked and timed PSK signals using > the high power transmitter giving around 100mW ERP - at least it should be > that power when the weather eventually stops raining.
	www.amrad.org /pipermail/lf/2002q1.txt (18514 words)

	mb21 - The Transmission Gallery (Site not responding. Last check: 2007-10-08)
		The Droitwich site is considered to be one of the most important in the country because it transmits the Radio 4 Long Wave service.
		The carrier frequency of the Droitwich Long Wave transmitter is a long established frequency standard (until 1-Feb-1988 it was 200kHz) and is carefully monitored by the National Physical Laboratory in Teddington, Middx.
		If you have any photos of UK broadcast transmitter sites please get in touch.
	tx.mb21.co.uk /gallery/droitwich/index.asp (135 words)

	The 101 Things that we Know and Love Television For
		All alone on BBC 2 at 11 am throughout the 1970's.
		They just told us which transmitters were off air and on reduced power and also made us get familiar with which transmitter that served our area.
		Transmitter that programmes are received from is usually in the same direction that the aerial is pointed in.
	www.webspawner.com /users/asperger/britishtv101.html (11267 words)

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