Sam's Telecomms Documents Repository

Documents from other sources

Circuit Symbols	Description of scalable images of electromechanical circuit symbols in Windows Metafile format. Download the Zip file symbols.zip (141kB)
Cable Simulator	A friend built this along time ago to simulate PO cable types to assist with testing equipment. Component values and photos to show construction. [374 kB]
Dictograph Flyer Dictograph Explanatory diagram Dictograph Users Handbook Dictograph circuit for system with one master	Dictograph office telephone systems: a promotional flyer and explanatory circuit diagram, both circa 1936, user's handbook (digital recreation), possibly 1950s, and a circuit for one master station and two subs, dated 1953, converted from a blueprint. Courtesy of my correspondent in Australia. [ 239kB, 512kB & 102kB ]
French PTT S63 Telephone	Courtesy of John Mulrane a redrawn version of the internal paster label with English captions. [12 kB]
GEC Telecommunications, August 1956 Contents & photographs GEC: New High Performance from Subscribers' Telephones	Courtesy of Andrew in Australia, the contents page of the GEC house mag from 1956 & colour photo of the 1000 range [73 kB] Followed by the first of two articles describing the design behind the new 1000 range of telephones. [1.6 MB]
GEC 1000 Telephone	The second of two articles describing this new introduction to their range of telephones, the 1000 model. [128 kB]
GTE US Flip-Phone GTE UK Flip-Phone	Original USA version and UK version of user instructions. [220 kB & 631 kB]
Lineman's telephone, No 704.	Installation and operating instructions 69kB
Lineman's telephone, DSTS 5.	Chesilvale (now Tempo) Dual-Standard Test Set No 5, DSTS5, operating instructions - reconstructed from OCR text. Original courtesy of John Goldfinch and Tempo. 357 kB
Loading of Telephone Cables	A 1974 guide from STC on the principles of cable loading and selection of suitable coils. 292 kB
Plessey 745	Weatherproof CB telephone handbook (as in Railways above). 800kB
Pneumatic Protection of Telephone Cable Networks	An article about pressurisaiton of cables, probably produced by Drallim Ltd, with some of my photographs added. 67kB
Poste téléphonique à transistors expérimental	An article from French telecomms journal 'Commutation et électronique' from 1969, describing an experimental telephone using transistors both for amplification and as the hybrid. In French. Courtesy of Andrew Marland 796 kB
Post Office Charge Groups	A map of the UK mainland showing the telephone groups on which charging was based. Created by staff on British Railways for their own reference purposes. See also the STD Equivalents List below.
Siemens Report W923, Motor Uniselector	Courtesy of John Mulrane. This is a detailed description of the construction and operation of the motorised uniselector as used widely in the PO trunk switching network. Excellent photographs. Dated 1934.646kB
STD Equivalents List	A list of the Post Office Subscriber Trunk Dialling codes showing the way the routing in the trunk switching network worked. See also the Charge Group map above. 68 kB
Telephones: Their construction and fitting	A practical treatise on the fitting up and maintenance of telephones and their auxiliary apparatus. The first two chapters on Receivers and Transmitters of a text book by F.C. Allsop published by E. & F.N. Spon, London 1895. Courtesy of John Goldfinch. 2.7 MB
Tremolo Telephone User Guide	British Telecom User Guide to the Tremolo Telephone, Telephone Number 9701 - part of the InPhone range, made by Northern Telecom.1166 kB
TIM 2000	A digital recreation of the good old-fashioned Post Office Speaking Clock with the voice of Pat Simmonds. [HTML]
Western Eletric Vacuum Tubes for use with Amateur Radio	Catalogue from 1933 of valves made by the WeCo. Normally only available to the trade, they were made available to amateurs as a 'concession'. Looking at the prices at the end it wasn't much of a concession. Thanks to Steve Cichorsky for posting this on Greenkeys mailing list. 2.1 MB

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