gec.gif (1164 bytes)Current Comments and
G
EC Telecommunications


Current Comments and G.E.C Telecommunications

The G.E.C. Telephone Works, Coventry produced a technical magazine, starting in 1930 and ending in 1967, with a break during the second world war.  The first issue was called Current Comments and changed name to G.E.C. Telecommunications in 1946. The first issue was more of a marketing journal but this changed over the years and the final issue was relatively technical.

Please don't ask why the issues seem to jump from numbers to volumes to dates to and then back to numbers - they just do!

Apparatus and Components
Carrier, Radio and Repeater Equipment
Domestic Radio and Television
Exchange Descriptions
Miscellaneous
P.A.B.X
Remote Control Equipment
Rural Automatic Exchanges
Sound Reproduction Equipment
Telephone Exchange Design
Train systems

 


 

 

 
EXCHANGE DESCRIPTIONS Month or issue Year Page
Public exchange system, Hobart Central Automatic Exchange April 1930 23
Public exchange system, Singapore July 1930 21
London's New Telephone System: Excess Fee Metering at Fairfield Exchange, Croydon Oct 1930 18
Public exchange system, Preston Multi-Exchange Area April 1931 14
Public exchange system, G.E.C. Contracts Recently Completed: New Telephone Exchanges for London, Birmingham, Manchester, Glasgow and Nairobi (Kenya) July 1931 25
Public exchange system, Notes on New Work Oct 1931 55
G.E.C. Contracts Recently Completed Jan 1932 91
Public exchange system, Prospect (London) April 1932 123
Public exchange system, Urmston Automatic Exchange, Manchester Jan 1933 23
Private exchange system, Q.T.E.V. Queen of Bermuda April 1933 36
Public exchange system, Wordsworth Automatic Exchange, London April 1933 46
Public exchange system, Automatic Telephones in the State of Rampur, India July 1933 68
Public exchange system, Kensington Automatic Exchange Jan 1934 16
Public exchange system, Liverpool Trunk Exchange April 1934 31
Public exchange system, Erdington Automatic Exchange Oct 1934 88
Public exchange system, New Trunk Exchange at Er Ramle No. 1 1935 12
Private exchange system, S.S. Queen Mary No. 2. 1936 37
Public exchange system, New Automatic Exchanges installed by The G.E.C. No. 2 1936 57
Public exchange system, New G.E.C. Exchanges in the London Area No. 3 1936 80
Public exchange system, Glasgow: New trunk, tandem and central exchanges Volume 7, Number 1 1937 5
Public exchange system, Coventry Group Centre Switchboard on the Trunk Telephone System Volume 7, Number 3 1937 107
Public exchange system, First Public Exchange in Siam Volume 7, Number 3 1937 110
Public exchange system, Bangkok, Wat Lieb and Bangrak Exchanges Volume 8, Number 1 1938 5
Public exchange system, Jerusalem, Bethlehem and Tel-Aviv Volume 8, Number 2 1938 41
Private exchange system, S.S. Stratheden Volume 8, Number 2 1938 61
Private exchange system, S.S. Strathallan Volume 8, Number 2 1938 61
Private exchange system, M. S. Dominion Monarch Volume 8, Number 2 1938 61
Public exchange system, Four Automatic Exchanges for India Volume 8, Number 3 1938 98
Public exchange system, Melbourne City West Exchange Volume 9, Number 2 1939 53
Public exchange system, Baghdad, Iraq Volume 5, number 1 1950 20
Public exchange system, Birmingham (Ashfield), England Number 18 1953 34
Public exchange system, Chittagong, Pakistan Number 15 1952 2
Public exchange system, Coventry (Walsgrave-on-Sowe), England Number 16 1952 4
Public exchange system, Dundee (Broughty Ferry), Scotland Number 30 1960 21
Public exchange system, Edinburgh (George Street), Scotland Volume 5, number 3 1950 101
Public exchange system, Gainsborough, England Volume 5, number 2 1950 56
Public exchange system, Humboldt, Canada Number 22 1956 28
Public exchange system, Kuala Lumpur, Malaya Number 14 1952 3
Public exchange system, Kuching, Sarawak Number 21 1956 50
Public exchange system, Leamington Spa, England Number 34 1966 2
Public exchange system, London (Highgate Wood), England Number 32 1963 3
Public exchange system, Lower Hutt, New Zealand Volume 5, number 2 1950 46
Public exchange system, Palmerston North, New Zealand Number 17 1953 40
Public exchange system, Singapore Number 15 1952 26
Public exchange system, Stoke-on-Trent, England Volume 1, number 2 1946 93
Public exchange system, Sydney (St. Leonards), Australia Number 18 1953 2
Public exchange system, Sydney (St. Leonards), Australia Number 21 1956 50
Public exchange system, Teheran, Iran Volume 6, number 1 1951 5
Public exchange system, Wimbledon, England Volume 1, number 3 1946 141
Private exchange system, s.s. "Arcadia" Number 20 1955 42
Private exchange system, h.m.y. "Britannia" Number 19 1954 5
Private exchange system, m.v. "Canberra" Number 31 1962 25
Private exchange system, r.m.s. "Caronia" Volume 4, number 1 1949 5
Private exchange system, h.m.s. "Eagle" Number 15 1952 45
Private exchange system, m.v. "Oriana" Number 31 1962 25
Private exchange system, r.m.s. "Queen Elizabeth" Volume 1, number 3 1946 109
Private exchange system, for h.m. Ships Volume 6, number 2 1947 65
Private exchange system, reservation bureau for British Railways Number 19 1954 38
Private exchange system, railway traffic control, applications and developments, 1939 to 1945 Volume 1, number 1 1946 5
Private exchange system, railway traffic control, Manchester (British Railways) Volume 1, number 3 1946 115
Private exchange system, railway traffic control, Burntisland (British Railways) Volume 6, number 1 1951 19
Private exchange system, secretarial telephone answering service Number 26 1958 13
     
     
RURAL AUTOMATIC EXCHANGES      
Rural Automatic Exchanges Jan 1930 2
Rural Automatic Exchanges July 1930 17
Progress of the R.A.X. in Great Britain April 1931 1
Automatic and Semi-Automatic Telephone Exchanges for Rural Districts Jan 1932 71
Rural Semi-Automatic Telephone Systems: G.E.C. Standard Ten-Line All-Relay Exchange April 1934 45
Rural Automatic Exchanges: British Post Office Unit Auto. No. 12 No. 2 1935 27
Rural Automatic Exchanges: Service in India No. 2 1936 53
Rural Automatic Exchanges: 10 Line Volume 7, Number 2 1937 58
Rural Automatic Exchanges: Tandem working, New Units with Tie-line Facilities Volume 8, Number 1 1938 21
R.A.X., 50/500 line Volume 2, number 1 1947 34
R.A.X., 24 line, 25/100 line, and extensible types Volume 5, number 3 1950 124
R.A.X., applications in Canada Number 14 1952 9
R.A.X., 50/800 line (ST9115) Number 27 1958 40
     
     
PRIVATE AUTOMATIC EXCHANGES AND BRANCH EXCHANGES      
P.A.B.X., Private Automatic Branch Exchanges Jan 1930 14
P.A.B.X., Private Automatic Branch Exchanges April 1930 13
P.A.B.X., Nos. 5000 and 5100 April 1932 118
P.A.B.X., G.E.C. Auto-Cordless.  A Simple and Economical System for Small Installations Oct 1931 77
P.A.B.X., A Simple Unit for Attendant's use on a single Exchange Line No. 3 1935 84
Private Automatic Exchanges: An all relay unit for small systems No. 1 1936 5
P.A.B.X., A new exchange at Messrs. D. H. Evans store in London Volume 7, Number 1 1937 18
P.A.B.X., A new Exchange at Wellington Station, New Zealand Volume 7, Number 3 1937 81
P.A.B.X., A new Exchange at the Queens Hotel, Leeds, L.M. & S. Railway Company Volume 8, Number 1 1938 16
P.A.B.X., 2+23 line (PB2101) and 10+49 line (PB2301) Volume 5 1950 78
P.A.B.X., 10+99 line in dustproof cabinet (PB2351) Number 24 1957 21
P.A.B.X., 15+100 line, extensible (PB3200) Number 25 1957 16
P.A.B.X., 3+10 line (PB2202) Number 32 1963 51
P.A.B.X., Cordless (PB4200) Number 33 1964 31
P.A.X., 1700 line, at Filton, Bristol Number 16 1953 28
P.A.X., 10 line (PX1211) Number 30 1960 9
     
     
CARRIER, RADIO AND REPEATER EQUIPMENT      
Carrier Current Telephony on high tension transmission networks April 1930 6
The First Installation of Telephone Repeaters in Egypt Jan 1934 3
New Types of Telephone Repeater Units No. 1 1935 3
Carrier Current Telephony: New system installed by London and North-Eastern Railway between London and Glasgow No. 1 1935 8
Carrier Current Telephony. (Single-channel Set) No. 2 1935 38
G.E.C. Single-channel Carrier Repeater No. 3 1935 67
Developments in Carrier Current Telephony No. 3 1936 85
Three channel carrier telephone system for aerial lines Volume 7, Number 1 1937 8
Double Modulation as applied to a Twelve-channel Carrier System Volume 7, Number 2 1937 41
Transmission Equipment on International Circuits: St Margret's bay Repeater Station Volume 8, Number 2 1938 70
Twelve-channel Carrier System for Telephone cable Circuits Volume 8, Number 3 1938 81
Multi-channel Voice Frequency Telegraph System Volume 9, Number 1 1939 5
Cable carrier, applications and development, 1939 to 1945 Volume 1, number 1 1946 5
Cable carrier, 12 circuit, England-Channel Island system (B.P.O. No. 6) Volume 1, number 3 1946 123
Cable carrier, high-frequency attenuator, coaxial (TSL.8002A) Volume 1, number 3 1946 133
Cable carrier, 12 circuit and 24 circuit (B.P.O. No. 7) Volume 2, number 2 1947 49
Cable carrier, Anglo-Eireann system (B.P.O. No. 7) Volume 2, number 2 1947 78
Cable carrier, 12-circuit and 24-circuit group combining filters (B.P.O. No. 7) Volume 3, number 1 1948 45
Cable carrier, v.f. telegraph equipment, transistored, 24 circuit (SPO.1403) Number 24 1957 22
Channel equipment with out-of-band signalling (SPO.3006) Number 23 1957 20
Circuits, temperature dependent analysis of... Number 34 1966 21
Equipment practice, C.A.S.E. (B.P.O. type 62) Number 33 1964 21
Multiplex equipment, up to 240 circuit (SPO.1370) Number 26 1958 34
Multiplex equipment, up to 960 circuit, transistored (SPO.1385) Part 1 Number 32 1963 17
Multiplex equipment, up to 960 circuit, transistored (SPO.1385) Part 2 Number 33 1963 2
Multiplex equipment, Trans-Canadian (Movan) (SPO.1385) Number 34 1966 47
Open-wire carrier, applications Volume 2, number 1 1947 23
Open-wire carrier, rural (SPO.1030) Number 23 1957 42
Open-wire carrier, 3 circuit, "T1" equipment Volume 1, number 2 1946 80
Open-wire carrier, (SPO.1010) Number 21 1956 31
Open-wire carrier, (SPO.1011) Number 25 1957 52
Open-wire carrier, in Peru (SPO.1011) Number 29 1959 53
Open-wire carrier, transistored (SPO.1012) Number 30 1960 29
Open-wire carrier, 12 circuit (SPO.1020) Volume 5, number 2 1950 57
Open-wire carrier, (SPO.1025) Number 25 1957 41
Open-wire carrier, in Peru (SPO.1025) Number 29 1959 53
Open-wire carrier, v.f. telegraph equipment, 24 channel, transistored Number 24 1957 22
Picture transmission equipment Volume 2, number 1 1947 5
Picture transmission equipment Volume 5, number 2 1950 49
Planning microwave radio relay systems Number 34 1966 32
Power-line carrier, 8 circuit (type N) Volume 6, number 2 1951 85
Power-line carrier, 1 circuit (type PA) Number 14 1952 22
Power-line carrier, Electricity Supply Board of Ireland system Number 19 1954 9
Power-line carrier, Kitimat-Kemano, Canada (type N) Number 21 1956 45
Power-line carrier, Venezuela Number 23 1957 49
Power-line carrier, Owen Falls-Jinja (Uganda) Number 24 1957 50
Power-line carrier, high speed intertripping equipment (SPO.2800) Number 24 1957 38
Remote supervisory equipment for radio links Number 26 1958 43
S.H.F. radio equipment, 960 circuit (SPO.5555) Number 32 1963 8
S.H.F. radio equipment, changeover control and baseband equipment (SPO.5303) Number 32 1963 27
S.H.F. radio equipment, planning a system Number 34 1966 32
Signalling equipment, four frequency dialling system Volume 6, number 1 1951 6
Signalling equipment, tone, for use with F.M. radio links Number 30 1960 22
Telegraph system, multichannel Volume 6, number 1 1951 29
Test equipment, for channel panels, automatic distortion measuring set, Telegraph systems Number 32 1963 36
Test equipment, pulse techniques for communication circuits Number 16 1953 10
Test equipment, transmission constants on carrier telephone systems Volume 5, number 1 1950 25
Television relay system, video Number 18 1953 4
Temperature dependent circuits, analysis of Number 34 1966 21
U.H.F. radio equipment, 60 circuit (SPO.5500) Number 22 1956 34
U.H.F. radio equipment, 240 circuit (SPO.5501) Number 26   18
U.H.F. radio equipment, television (SPO.5551) Number 21 1956 5
U.H.F. radio equipment, standby protection arrangements (SPO.5301) Number 26 1958 25
U.H.F. radio equipment, television relay, London-Birmingham, England Volume 2, number 2 1947 81
U.H.F. radio equipment, television relay, London-Birmingham, England Volume 5, number 1 1950 5
U.H.F. radio equipment, television relay, Switzerland Number 20 1955 21
U.H.F. radio equipment, television relay, London-Windsor (Canada) Number 21 1956 5
U.H.F. radio equipment, 12 circuit, South West Africa Number 26 1958 48
U.H.F. radio planning a system Number 34 1966 32
V.F. repeater Volume 2, number 1 1947 28
V.H.F. radio equipment, multicircuit, part 1 Volume 4, number 2 1949 62
V.H.F. radio equipment, multicircuit, part 2 Volume 5, number 1 1950 33
V.H.F. radio equipment, 5 circuit (SPO.5050) Number 20 1955 4
V.H.F. radio equipment, in Canada (SPO.5050) Number 25 1957 2
V.H.F. radio equipment, (SPO.5051) Number 29 1959 24
V.H.F. radio equipment, transportable (SPO.5070) Number 29 1959 43
V.H.F. radio equipment, in Kenya (SPO.5050) Number 29 1959 46
V.H.F. radio equipment, 9 circuit (SPO.5060) Number 29 1959 32
V.H.F. radio equipment, Junction Number 29 1959 23
V.H.F. aerial (SPO.5802) Number 29 1959 32
V.H.F. amplifier (SPO.5088) Number 31 1962 63
V.H.F. amplifier (SPO.5090) Number 29 1959 41
V.H.F. transmitter (BRT.108) Number 17 1953 27
Voice amplifier (television relay) Volume 5, number 3 1950 133
Voice amplifier (television relay) Number 18 1953 4
     
     
REMOTE CONTROL EQUIPMENT      
The Development of Remote Control Systems Jan 1930 7
Supervisory Control Systems April 1930 25
A Ten-Point Tandem Supervisory Control System Oct 1931 43
A Survey of the Communication Requirements of Electric Power Supply undertakings July 1933 71
Remote Supervisory Control: G.E.C. Tandem System installed on Winchester Corporation Electricity Supply Network Oct 1934 66
British Industries Fair: G.E.C. Exhibit of Remote Supervisory Control Equipment No. 2 1935 33
Remote Supervisory Control No. 3 1935 70
A New Method in the Remote Indication of Meter Readings No. 2 1936 42
Remote Supervisory Control: Electricity Supply Systems, Borough of Hornsey, London Volume 7, Number 3 1937 98
Remote Supervisory Control: Recent Applications Volume 8, Number 3 1938 101
Application and development 1939 to 1945 Volume 1, number 1 1946 5
Centralized traffic control (Rhodesian Railways) Number 17 1953 5
Low-frequency a.c. signalling system Number 14 1952 17
Power supply, Australian Railways Number 22 1956 32
Power supply, British Railways (Southern Region) Number 23 1957 25
Power supply, British Railways (Southern Region) Number 31 1962 3
Power supply, Athens electricity authority Number 20 1955 40
Power supply, United Kingdom electricity authority Number 27 1958 3
Radio Links Number 26 1958 43
Water Supply, United Kingdom electricity authority Number 20 1955 24
     
     
TRAIN CONTROL TELEPHONES AND TRAIN DESCRIBERS      
A Traffic Control Party Line Telephone System with Selective Calling by Dial April 1931 3
Train Describers: New System installed in Glasgow by the L.M. & S. Rly. July 1933 51
Train Describers: New Main Line Equipment installed by L. & N.E. Railway Oct 1931 59
Selective Ringing Telephone System: For Train Control No. 3 1936 69
Selective Ringing Telephone System: Volume 7, Number 2 1937 50
Selective Ringing Telephone System: Newcastle District, London and North-Eastern Railway Volume 7, Number 3 1937 101
     
     
SOUND REPRODUCTION EQUIPMENT      
An All-Electric Gramophone Reproducer Jan 1930 14
Breakdown Message Speech Transmission System of the London Underground Railways Jan 1932 78
The Distribution of Radio Broadcast Programmes at Audio Frequency July 1932 127
G.E.C. Broadcast Call System April 1933 27
Radio Relay Systems: Application overseas for relaying Empire Broadcast Programmes Jan 1934 23
Audio Frequency Distribution of Short Wave Programmes: Radio Relay Equipment for overseas service April 1934 48
Radio Relay System at Accra, Gold Coast No. 2 1935 53
Loudspeaking Equipment at Euston Station, London, Midland and Scottish Railway No. 1 1936 19
Loudspeaking Equipment at Birmingham Fire Station No. 3 1936 91
Public address system, Barry Island, Wales Volume 5, Number 3 1950 143
Public address system, Glasgow, Scotland Number 18 1953 44
Receivers, broadcast, export model (BC.5082) Volume 5, number 1 1950 32
Receivers, broadcast, export models Number 14 1952 30
Receivers, broadcast, radio and television, at 1953 Radio Show Number 18 1953 32
Receivers, broadcast, industrial (BCS.2353/4) Number 19 1954 44
Receivers, broadcast, radio and television Number 20 1955 28
Receivers, broadcast,  radio and television Number 21 1956 52
Receivers, communication, 1.5 to 33 Mc/s (BRT.400) Volume 3, number 1 1948 26
Receivers, improvements in design (BRT.400) Number 16 1953 40
Receivers, B.B.C. monitoring service (BRT.400) Number 18 1953 14
Receivers, single frequency (BRT.410) Volume 4, number 1 1949 33
Sound reproducing equipment, mobile amplifier, 3 watt Volume 5, number 2 1950 85
Sound reproducing equipment, amplifier, 30 watt (BCS.2430) Number 16 1953 31
Sound reproducing equipment, high quality loudspeaker Number 19 1954 43
Sound reproducing equipment, amplifier, 10 watt (BCS.2409L) Number 22 1956 52
Sound reproducing equipment, recent developments Number 24 1957 45
Sound reproducing equipment, underground listening Number 27 1958 54
Sound reproduction system, United Nations conference, Singapore Volume 5, number 1 1950 19
Sound reproduction system, council chamber, Singapore Volume 6, number 1 1951 44
Sound reproduction system, hotel, Singapore Number 15 1952 46
Sound reproduction system, s.s. "Cairndhu" and s.s. "Cairn Gowan" Number 15 1952 46
Relay systems, television, London to Birmingham, England Volume 2, number 2 1947 81
Relay systems, television, London to Birmingham, England Volume 5, number 1 1950 5
Relay systems, television, London, England, to South Wales Number 18 1953 4
Relay systems, television, Switzerland Number 20 1955 21
Relay systems, television, Switzerland Number 30 1960 52
Transmitter, m.f., h.f., and vhf., 100 and 150 watts Volume 6, number 2 1951 72
Transmitter, h.f., 1 kW, communication and broadcast (BRT.1002) Volume 5, number 3 1950 106
Transmitter-receiver, h.f., transportable Volume 4, number 1 1949 12
V.H.F. radiotelephone, applications and development, 1939 to 1945 Volume 1, number 1 1946 5
V.H.F. radiotelephone, short range communication methods Volume 1, number 2 1946 61
V.H.F. radiotelephone, Guernsey ambulance service Volume 2, number 1 1947 25
V.H.F. radiotelephone, Royal visit to South Africa Volume 2, number 2 1947 76
V.H.F. radiotelephone, new equipment Volume 3, number 1 1948 5
V.H.F. radiotelephone, systems Volume 6, number 1 1951 6
V.H.F. radiotelephone, design considerations Number 17 1953 16
V.H.F. radiotelephone, North Thames Gas Board, England Volume 5, number 2 1950 86
V.H.F. radiotelephone, Portugal Number 15 1952 35
V.H.F. radiotelephone, at London Airport, England Number 18 1953 22
V.H.F. radiotelephone, at Coventry, England Number 19 1954 42
V.H.F. radiotelephone, ship to shore link, Hong Kong Number 20 1955 30
     
     
DOMESTIC RADIO RECEIVERS AND TELEVISION      
Empire Broadcasting: A New Supersonic Heterodyne Receiver for wave lengths between 13 and 700 metres July 1931 16
Empire Broadcasting: G.E.C. Overseas Model Multi-Wave Super-Heterodyne Receiver for A.C. Mains April 1933 40
G.E.C. Radio: The New "Overseas 7" Short and Medium Wave Receiver for A.C. Mains April 1934 35
G.E.C. Radio: The New "Fidelity All-Wave" Receiver No. 1 1936 8
G.E.C. Radio: The Fidelity all-wave Series Volume 7, Number 2 1937 64
An Outline of the Principles of Television with reference to G.E.C. Receivers Volume 7, Number 3 1937 88
G.E.C. Radio: The Fidelity all-wave Super Ten Radio Volume 8, Number 2 1938 55
     
     
APPARATUS and COMPONENTS      
Wiper Cords for Two-Motion Selector Switches Jan 1930 9
A Variable Frequency Oscillator Jan 1930 10
A Hand-combined Telephone for Common Battery Systems Jan 1930 16
Dials, The Automatic Dial Switch Jan 1930 17
The Rotary Line Switch April 1930 1
Impregnated Paper Dielectric Condensers April 1930 4
Telephone, The GECOPHONE Hand-combination Telephone April 1930 29
Telephone, The Switching Bell Set July 1930 14
Telephone, The GECOPHONE Hand-combination Telephone Oct 1930 1
A New Two-Position Relay Oct 1930 17
Telephone, A New Convertible Telephone Jan 1931 5
The New Standard Terminal Strip April 1931 22
Dials, Dial Speed Tester April 1931 23
Improvements in Ringer Design April 1931 26
The Subscriber's Amplifier July 1931 22
A New Travelling Ladder Oct 1931 52
A Transmission Measuring Set Type T.M.2 Jan 1932 63
Notes on the Design of Portable Routine Testers for Automatic Telephone Exchanges Jan 1932 84
Telephone Coin Collecting Boxes April 1932 99
The New "Minor" Relay April 1932 113
Telephone Coin Collecting Boxes (Contd.) July 1932 138
Keysender, A Keysender for Private Branch Exchanges Jan 1933 3
Telephone, Coloured Telephones Jan 1933 9
A New Tuned Vibratory Interrupter Jan 1933 11
Relays, A New Sensitive High Speed Relay April 1933 32
Telephone, Miniature Telephone April 1933 45
A New Audio Frequency Oscillator July 1933 65
An Improved Ringing Vibrator July 1933 70
Telephone, The Subscriber's Telephone: Recent Improvements in Design Jan 1931 11
Keysender, A New Mechanical Keysender April 1934 40
A New and Improved Tension Gauge Oct 1933 74
A New Portable Transmission Measuring Set Oct 1934 83
Telephone, A Loudspeaking Telephone for Private Automatic Systems No. 1 1935 17
Keysender, The G.E.C. Mechanical Keysender No. 1 1935 22
A New Mains-operated Ringing Vibrator Unit No. 2 1935 44
Telephone, Magneto Telephones for use in Mines No. 2 1935 47
Paper-Dielectric Condensers No. 2 1935 56
New Standard Vibrators No. 3 1935 78
Relays, A New High-Speed Relay No. 3 1935 80
Uniselectors, Both-way Uniselector No. 3 1935 82
The British Post Office Standard Tension Gauge No. 3 1936 88
Dials, Production of the Automatic Dial No. 3 1936 92
Telephone, A Battery Call Telephone for use in Incendive Atmospheres Volume 7, Number 1 1937 22
Extension Telephone System Volume 8, Number 1 1938 11
A New Magneto Extension Bell Volume 8, Number 1 1938 25
Service Telephones in Fountain House, Park Lane Volume 8, Number 3 1938 112
Telephone, Muraphone, A New Telephone for wall mounting Volume 9, Number 3 1939 22
Telephones on Passenger Trains: Equipment fitted on the Coronation Scott Volume 9, Number 1 1939 27
A Combined Linefinder and Allotter Switch Volume 9, Number 1 1939 40
Extension Telephone Schemes Volume 9, Number 2 1939 65
All Relay Keysender for use on P.A.B.X. and main exchanges Volume 9, Number 2 1939 73
Telephones: In the London Foreign Exchange market Volume 9, Number 2 1939 79
An Improved Switch of the Pushbutton Type Volume 9, Number 2 1939 85
An Emergency Call System Volume 9, Number 2 1939 86
Telephone, pushbutton intercommunication (ITL1 and ITL2) Volume 3, number 1 1948 34
Telephone, Gecophone Junior (MTL1) Volume 3, number 1 1948 41
Telephone, G.E.C. 1000 Number 22 1956 19
Telephone, loudspeaking, for use with p.a.x. (STL15) Number 24 1957 5
Telephone, New Gecophone (G.E.C. 706) Number 29 1959 4
Telephone, loudspeaking, intercommunication (ITL3) Number 30 1960 3
Telephone, pushbutton, extension (STL17) Number 31 1962 41
Telephone, application and development, 1939 to 1945 Volume 1, number 1 1946 15
Telephone, routine tester for Volume 1, number 1 1946 79
Telephone, circuits and performance Volume 4, number 2 1947 79
Telephone, a new high performance Number 22 1956 5
Telephone, line assessment for use with "G.E.C. 706" Number 33 1964 13
Telephone, intercommunication equipment for Divers Number 19 1954 45
Telephone dial, trigger (DLI100 series) Volume 3, number 1 1948 15
Telephone dial, trigger (DIA4 series) Number 30 1960 39
Keysender, relay Volume 5, number 2 1950 88
Keysender, capacity storage Volume 1, number 2 1946 98
Keysender, capacity storage Number 31 1962 20
SE50 Two-motion selector, description Volume 6, number 2 1951 51
SE50 Two-motion selector, further notes Number 15 1952 43
SE50 Two-motion selector, battery testing group selector Number 16 1953 32
SE50 Two-motion selector, interruptor springset design Number 17 1953 48
SE50 Two-motion selector, uniformity in adjustment Number 18 1953 38
SE50 Two-motion selector, applications Number 21 1956 50
SE50 Two-motion selector, as linefinder Number 22 1956 23
Uniselectors, subscriber's line circuit Volume 5, number 1 1950 13
Uniselectors, heavy duty Volume 3, number 1 1948 20
Uniselectors, economy and efficiency in subscriber's line circuits Volume 1, number 3 1946 129
Relays, miniature (MRL1) Volume 1, number 3 1946 138
Relays, tropicalisation Volume 4, number 1 1949 23
Relays, power circuit indicating Volume 5, number 3 1950 144
Relays, ratchet, 2 cam (RRL3) Number 29 1959 12
Charging meter, 5 digit, exchange (ME2000 series) Number 24 1957 17
Charging meter, clock type, subscriber's premises Number 33 1964 9
Rotary switch, multi-position Volume 5, number 1 1950 41
Semiconductors, germanium diodes Volume 5, number 3 1950 131
Semiconductors, germanium diodes and transistors Number 15 1952 29
Semiconductors, manufacture and testing of germanium diodes Number 17 1953 34
Semiconductors, manufacture and testing of transistor type GET.1 Number 18 1953 16
     
     
MISCELLANEOUS      
Foreword Jan 1930 1
The Elimination of Relay Contact Troubles Jan 1930 5
The Director System of Automatic Telephony Jan 1930 18
The Hamilton "M" Type Totalisator Jan 1930 26
An Improved Form of Terminal Unit for Lead Covered Air Space Paper Core Cables April 1930 1
Remote Control of Selective Switches in Automatic Telephony July 1930 5
Loading Coils Oct 1930 4
Automatic Telephony: An Improved method of Line Switching Jan 1931 1
Cairo-Tanta-Alexandria Loaded Trunk Telephone Cable Jan 1931 10
Telephones, Intercommunication System with Loudspeaking Master Stations Jan 1931 21
The G.E.C. Anti-Sidetone Circuit April 1931 12
A New Insulating Material for Switchboard Cables July 1931 3
The Microscope in the Telephone  industry July 1931 8
Improvements in the Manufacture of Telephone Cords July 1931 14
An Invitation Oct 1931 ,35
Measurement of Transmission Loss of Line Transformers at Voice Frequencies Oct 1931 39
A Method of Calculating Balances for Unloaded Telephone Circuits April 1932 107
Progress in the Telephone Industry April 1932 122
Characteristics of Modern Microphones July 1932 143
The Testing of Telephone Transmitters July 1932 152
Recent Development of the British Trunk Telephone Network Jan 1933 14
Group Telephone Service: New System to be adopted by the British Post Office Jan 1934 8
G.E.C. Telephone Equipment for Iraq-Mediterranean oil pipe line No. 1 1935 7
Notes on New Work No. 2 1935 57
Telephones,  for use in Apartment Flats No. 3 1935 63
Automatic Telephone Equipment in Siam No. 3 1935 86
Automatic Vote - Recording Equipment installed in Middlesex County Hall No. 1 1936 12
Some Notes on New Work No. 1 1936 16
Automatic Telephone Traffic Recording No. 1 1936 23
Loading Equipment for Telephone Cables No. 2 1936 45
A Gas Filled Arrestor for Telephone Lines Volume 7, Number 1 1937 28
Portable Transmission Measuring Set Volume 7, Number 2 1937 71
Current G.E.C. Contracts Volume 8, Number 1 1938 27
Empire Exhibition in Glasgow: Sound Reproductive Equipment Volume 8, Number 2 1938 48
50-cycle Current used on Inter-exchange Connections Volume 9, Number 1 1939 15
G.E.C. Activities in Communications Volume 9, Number 1 1939 31
Catalogue numbering system, revised Volume 1, number 3 1946 122
Central maintenance training school, B.P.O. Volume 2, number 2 1947 69
Data processing system (I.C.T.1301) Number 31 1962 28
Data transmission system, high speed (DT.10) Number 33 1964 42
Decibels, addition of power levels in Number 19 1954 35
Decibels, subtraction of power levels in Number 24 1957 52
Equipment for armed forces, communications Volume 1, number 1 1946 30
Equipment for armed forces, electronics Number 17 1953 4
Exhibitions, British Industries Fair, 1947 Volume 2, number 1 1947 41
Exhibitions, Farnborough (N.A.T.O.) Number 17 1953 4
Exhibitions, Cairo Agriculture and Industries Trade Fair Volume 4, number 1 1949 40
Exhibitions, G.E.C. research laboratories Volume 4, number 2 1949 53
Exhibitions, Railway congress Number 19 1954 41
Exhibitions, Bangkok chamber of commerce fair Number 23 1957 48
Mathematika Volume 2, number 2 1947 82
Progress and application, number 1 Volume 5, number 3 1950 146

Progress and application, number 2

Volume 6, number 1 1951 45

Progress and application, number 3

Volume 6, number 2 1951 100
Retirement of Mr. R. E. Robinson, Assistant Managing Director Number 30 1960 2
     
     
TELEPHONE EXCHANGE DESIGN      
Applications and development, 1939 to 1945 Volume 1, number 1 1946 9
Subscriber's line circuits, economy and efficiency Volume 1, number 3 1946 129
Subscriber's line circuits, new facilities and equipment Number 15 1952 15
Subscriber's line circuits, assessment for use with "G.E.C. 706" telephone Number 33 1964 13
Cabinets for u.a.x. Volume 4, number 1 1949 39
Automatic switching of telegraph lines Volume 4, number 2 1949 41
Dialling system, 4 frequency Number 14 1952 33
Dialling system, v.f. Number 20 1955 43
Suppression of interference from telephone apparatus Number 15 1952 36
Calling line identification Number 16 1953 5
Battery testing group selector Number 16 1953 32
Interworking between Strowger and rotary systems Number 17 1953 40
Partial call queueing on auto-manual sleeve-control switchboards Number 18 1953 24
Release conditions in automatic exchanges Number 18 1953 35
Photographic meter-reading recorder Number 20 1955 16
Photographic meter-reading recorder Number 30 1960 16
Subscriber-to-subscriber trunk dialling Number 20 1955 31
Subscriber-to-subscriber trunk dialling in Great Britain Number 28 1959 4
Subscriber-to-subscriber trunk dialling equipment Number 28 1959 36
Power plant, medium exchanges Number 21 1956 25
Power plant, medium to large exchanges Number 27 1958 50
Ringing dynamotor Number 22 1956 30
Electronic switching, introduction Number 23 1957 4
Electronic switching, cold cathode voltage transfer circuits, part 1 Number 23 1957 6
Electronic switching, cold cathode voltage transfer circuits, part 2 Number 24 1957 30
Electronic switching, joint announcement by B.P.O. and British telephone manufacturers Number 25 1957 25
Electronic switching, EDICT and EDIT Number 25 1957 26
Electronic switching, automatic exchanges Number 27 1958 32
Electronic switching, register-translator Number 28 1959 14
Electronic switching, experimental exchange Number 30 1960 14
Electronic switching, exchange for London (Highgate Wood), England Number 32 1963 3
Electronic switching, RS31, at Leamington Spa, England Number 34 1966 2
Changed number announcer Number 25 1957 34
Centralized service observation system Number 26 1958 4
Group selector rack with grading facilities for 100-outlet selectors Number 26 1958 10
Register-translator, electronic Number 28 1959 3
Register-translator, routing by Number 28 1959 8
Register-translator, electronic, circuit design Number 28 1959 14
Annoyance-hold interception equipment Number 30 1960 25
Unlimited dial pulse repetition Number 30 1960 42
Single voice frequency signalling equipment Number 31 1962 50
Meter pulse supplies, s.t.d. systems Number 32 1963 45
Artificial traffic equipment Number 32 1963 58
     
     

 

 

 
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