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Acoustics

Equipment For Acoustic Measurements (Part 1 - A Portable General Purpose Microphone Amplifier).pdf

The paper above includes a rather poor quality picture of an amplifier.  It is fairly similar to the amplifier shown below, which still exists.  The pictures were contributed to bbceng by Derek Hughes as a result of his father Spencer Hughes rescuing the amplifier from Research Department at Kingswood Warren when there was a clear out of 'redundant plant'.

Derek has noted the differences listed below.  If you are able to provide more information please get in touch.

The first 2 stages use EF86 rather then the EF50 & CV138 (?).

The valve layout also seems different.

Also mine has the gain at 80 - 100dB rather than 70 - 90, & uses a Painton stepped attenuator for fine gain control.

The output jacks are between the amp section & the PSU rather than at the extreme right hand side.

There is also a switch in the BBC page next to the input jack that I assume is a 600ohm/Bridging switch

Mine is labeled Mic Amp & LSA & PPM Mk 4/4, is this likely to be earlier or later then the one on the BBC page?

I think it may be later, as per the reference in the text to selected EF50 valves rather than the later EF86.

Equipment For Acoustic Measurements (Part 2 - A Portable Tone Source Developed For Use In Room Acoustics).pdf

Equipment For Acoustic Measurements (Part 3 - Acoustic Pulse Measurements).pdf

 

Communications

Managed Broadcast Network

 

Miscellaneous

BBC Radiophonic Workshop - link to An Engineering Perspective.

Traffic-info-1976.pdf

Broadcast Tech 1972.pdf

An Introduction to Broadcast Transmission Technology
This
is a "Ladybird Guide" for people who don't necessarily have prior technical knowledge.

 

Outside Broadcast and ENG

cmcr-paper-1977.pdf

Electronic News Gathering 1979.pdf

 

Propagation

Development of the BBC AM Transmitter Network
Updated to Rev.6a 28/5/07 with some revised text and additions to the Appendix listing of the 1926 Geneva Plan and 1929 Prague Plan.
This is a document compiled by Clive McCarthy from various public domain sources which are duly acknowledged at the end of the article.  It is quite possibly the most thorough single document summarising the development of the network with regard to frequencies, powers and service areas.  Clive worked as an engineer at Television Centre and produced this document as a result of personal interest.  It is believed to be correct but accuracy is not guaranteed.  Please note that BBC Research & Development is the ultimate authority on BBC service planning matters.

Radio-waves-ww-1975.pdf

mush-1974.pdf

Radio Reception Booklet.pdf

Sound

Microphone data sheets.pdf

SiS paper 1969.pdf

13 Ch PCM Paper 1972r.pdf

NICAM proposal c1973.pdf

The Digits behind BBC FM by Jim Lesurf
This is an excellent description of developments which made high quality stereo radio broadcasting available throughout most of the UK.  It covers the original PCM system and NICAM.

dev-prog-limiters-1977.pdf

 

Television

World Analogue Television Standards and Waveforms
An excellent description compiled by Alan Pemberton and contributed to bbceng.
(It was originally on a separate website and is now in the form of a single PDF file.  As a result some of the links are broken.)

Early development of the BBC’s colour television service.

Anchor-1972.pdf

The History Of Ceefax.pdf

The PAL Receiver: developments and progress
PROC. IEE, Vol. 125, No.6, June 1978
The paper describes how in 1967 colour television was promoted in the United KIngdom by all interested parties and it describes the public's enthusiastic response during the first nine years of colour transmission. It recalls the American and French colour-system experiments and the subsequent PAL colour system that Dr. Walter Bruch introduced.  Examples of engineering development in colour receivers are given, with descriptions of colour tubes, components and circuit techniques.
This paper, co-authored by G.H. Sturge and P.A. Tingey, is not published on this web site, but please email for more information.

Breakfast Television Office Automation

 

Transmitters

Contributions by David Porter:

Tricks of the Trade: 32 articles published in "Signal", regarding transmitter systems and one studio system.

The Marconi BD272 and B6124 HF transmitters - a video tour, preceded by an introduction to Woofferton transmitting station.
Part 1, 2, 3, 4, 5, 6, 7 (BD272); 8 and 9 (B6124).  Click on the links to view each these videos, which were uploaded to YouTube by the presenter David Porter.

UK MW & LW Broadcasting: the first 95 years. Reproduced with kind permission from www.wrth.com .

Woofferton - 70 Years on the Air. Reproduced with kind permission from www.wrth.com .

Why did Radio One have a separate frequency for Bournmouth, Poole and surrounding areas?

Background to and Engineering of VHF/FM Radio Broadcasting in the UK. Contributed by Geoff Platts.

Wrotham-ae-sys.pdf

Vintage BBC Transmitters - 2LO and AP

wof-control-system-c1980.pdf

mic-paper-1979.pdf

design-eg-silver-streak-1987.pdf


More

There are more technical articles in the Designs Department, Training and Technical Instruction sections.