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BBC Research and Development Reports

A collection of BBC Research and Development reports and white papers, dating from the 1960s through to 1996.

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R&D Report 1959-05 : Reception of Crystal Palace 51.5 Mc/s and 45.0 Mc/s channels in South Africa during the increasing phase of the sunspot cycle. T.W. Bennington Reception reports have been received from the Panorama, Johannesburg receiving station of the. South African Broadcasting Corporation in respect of the reception there during the period 1000-1800 GMT of the Crystal Palace 41'5 Mc/s and 45'0 Mc/s frequencies and the data are here presented. The reports have been analysed for 28...
Topics: reception, muf, gmt, variations, monthly, values, percentage, sunspot, mup, frequency, sunspot...
BBC Research and Development Reports
Nov 2, 2011 G.I. Ross, C.J. White, D.W. Taplin, J. Hall, I. Rhodes
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R&D Report 1957-14 : Television service - Isle of Man. G.I. Ross, C.J. White, D.W. Taplin, J. Hall, I. Rhodes The problem of providing the Isle of Man with a television service in Band I is discussed. It is shown that the west coast of the Island, including Peel, receives a satisfactory service from Divis and the northern sector, including Ramsey, will receive a satisfactory service from the proposed transmitter at Sandale. Because these areas will be so served and because a temporary...
Topics: snaefell, transmitter, strength, field, divis, interference, sandale, douglas, aerial, contours,...
R&D Report 1957-08 : Propagation of broadcast transmissions over the U.K./Johannesburg circuit during 1956. T.W. Bennington This report contains the results of an analysis of the signal strength and some other data obtained from the reception log sheets compiled at the Panorama, South Africa, receiving station of the South Africa Broadcasting Corporation. These deal with reception of BBC transmissions directed towards South Africa during every day of 1956. The results are presented in the...
Topics: signal, strength, observation, frequency, muf, luf, frequencies, gmt, signal strength, predicted,...
R&D Report 1957-02 : Report on International Colloquium on wave propagation, Paris - 17th to 21st September, 1956. T.W. Bennington This report summarises the International Colloquium on Wave Propagation which took place in Paris on 17-21st September 1956.
Topics: propagation, ionospheric, scattering, tropospheric, absorption, auroral, meteorological,...
BBC Research and Development Reports
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R&D Report 1956-36 : The Service area of the Les Platons Television Transmitter G.I. Ross, A.R. Williams This report gives the results of field strength survey of the Les Platons television transmitter. The service provided in Jersey is very good. Guernsey, on the whole, has a good service, although a small area in the west of the island receivers a field strength of less than 100 uV/m. Ninety-seven per cent of the population of the Channel Isles is within the 0.1 mV/m field strength...
Topics: les, platons, strength, guernsey, median, jersey, transmitter, field, field strength, channel, les...
R&D Report 1956-34 : Investigation of poor reception from Crystal Palace in the Reigate and Horsham areas B. Davis, G.D. Monteath, G.I. Ross An investigation has been made into complaints of poor reception, in the Reigate, Redhill and Crawley and Horsham districts, of the Crystal Palace television transmitter installation, in its temporary conditions. The field strength in these areas is lower than the value predicted from site test measurements and the prevalence of flutter fading due to...
Topics: palace, crystal, strength, field, tower, alexandra, flutter, horsham, measurements, aircraft, site...
R&D Report 1956-10 : Reception disturbances over North Atlantic paths during the years 1947 to 1954. T.W. Bennington The records of reception conditions over North Atlantic paths which are regularly made at Tatsfield have been examined for the eight years 1947 to 1954, with a view to learning something about the effects of ionospheric disturbances upon reception over these paths. The nature of the long-period and seasonal variations in the incidence of such disturbances has been...
Topics: disturbance, magnetic, reception, disturbed, ionospheric, tatsfield, conditions, disturbances,...
BBC Research and Development Reports
Nov 2, 2011 G.I. Ross, C.J. White, D.W. Taplin, R.S. Sandell, J. Hall
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R&D Report 1956-08 : Television transmitters -- Site tests in Cumberland. G.I. Ross, C.J. White, D.W. Taplin, R.S. Sandell, J. Hall Two sites, Warnell Fell and Sandale Fell, have been tested in Cumberland. Sandale Fell provided much better site, particularly in respect of a service to the populated coastal strip of Cumberland, and this report accordingly recommends that the transmitter be sited at Sandale Fell. The television distribution plan provides for a low power transmitter in...
Topics: sandale, transmitter, aerial, strength, pell, shotts, receiving, field, fell, kirk, service area,...
BBC Research and Development Reports
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R&D Report 1955-06 : The service area of the temporary television transmitter at Redmoss, Aberdeen. L.F. Tagholm, G.I. Ross, R.S.A. Sandell This report shows that the temporary transmitter at Radmoss, near Aberdeen, provides the city of Aberdeen with a reasonable television service using an effective radiated power of 3 watts. It is shown that the service will, in general, be similar to that expected from the final transmitter at Meldrum.
Topics: transmitter, aberdeen, temporary, redmoss, strength, vision, field, watts, field strength,...
BBC Research and Development Reports
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R&D Report 1955-01 : Mutual interference between naval radar and VHF FM broadcasting in Band II -- B.B.C. and A.S.R.E. tests R.A. Rowden, D.G. Beadle, G.I. Ross, D.E. Susans, K.H. Green Tests were carried out by the Admiralty Signal and Radar Establishment and the B.B.C. Research Department to investigate the mutual interference likely to arise from the co-channel operation of naval radar sets Type 281 and Type 960 with VHF FM broadcasting stations. Specific measurements and observations on...
Topics: interference, type, radar, wrotham, strength, broadcasting, tests, field, set, naval, radar sets,...
BBC Research and Development Reports
Nov 2, 2011 R.A. Rowden, R.D. Pittilo, G.I. Ross, K.H. Green, J.Hall
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R&D Report 1954-22 : South Devon television site tests second interim report. R.A. Rowden, R.D. Pittilo, G.I. Ross, K.H. Green, J.Hall The results of an additional site test for the television transmitter for the South Devon area are compared with results obtained from the other sites and previously reported (K.091). The earlier recommendation (May 1953), that North Hessary Tor be used as the site for this transmitter, is upheld.
Topics: tor, hessary, horner, north, site, contours, strength, field, devon, halt, service area, holme...
R&D Report 1954-17 : Examination of the distribution with frequency and time of the field of WWV at Tatsfield during six months near the sunspot minimum. T.W. Bennington Hourly measurements of the field of WWV on 5, 10, 15 and 20 Mc/s have been made at Tatsfield over the greater part of the day for the last six months of 1953, and these have been analysed. The departure and arrival angles corresponding to the different propagation modes for the different frequencies, times of day and...
Topics: field, frequencies, frequency, mode, predicted, measurements, muf, contours, absorption, luf,...
R&D Report 1954-09 : Information on short wave propagation conditions from reception results on fixed frequencies. T.W. Bennington Regular hourly observations made at Panorama, South Africa, on reception of five fixed frequencies from Standard Frequency Station WWV have been analysed to obtain information on propagation conditions and their daily and seasonal variations, for comparison with those given by world charts of predicted MUF. The results indicate that the predications agree well...
Topics: reception, muf, frequencies, gmt, propagation, signal, frequency, predicted, luf, panorama, sinpo...
BBC Research and Development Reports
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R&D Report 1954-03 : Subjective judgments on brightness. G.I. Ross Experiments have been conducted in the field of acoustics in order to determine whether it is possible for people to judge with any accuracy that one sound is twice as loud as another standard sound, or half as loud as the standard sound. It was found that people can be persuaded to make judgements of "twice as loud" and their results appear to be consistent within reasonable limits. It was concluded that one sound...
Topics: brightness, tho, standard, field, judgments, deviations, ratios, readings, subjects, deviation,...
R&D Report 1954-02 : The service area of the Holme Moss transmitter. G.I. Ross This report gives the results of a survey of the service area of the Holme Moss television transmitter. The results show that the service area is somewhat larger than that predicted in the site test report. (Research Report No. T-011/3). It is shown that in all but exceptional circumstances multipath interference troubles can be overcome by using a directional receiving aerial.
Topics: strength, field, contours, multipath, directional, sheffield, height, holme, moss, contour, site...
R&D Report 1954-01 : The service area of the temporary television transmitters at Truleigh Hill, Pontop Pike and Glencairn. G.I. Ross This report gives the results of a survey of the service areas of the temporary low power transmitters at Trueleigh Hill, Pontop Pike and Glencairn. Tests in the service area of the Glencairn transmitter revealed that echo effects (ghosts) are not serious and are readily eliminated. Reference is made to the deterioration in the service that may expected when...
Topics: pontop, truleigh, strength, pike, temporary, transmitters, transmitter, field, field strength,...