Equipment For Acoustic Measurements (Part 1 - A Portable General Purpose
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 (?).
layout also seems different.
has the gain at 80 - 100dB rather than 70 - 90, & uses a Painton stepped
attenuator for fine gain control.
jacks are between the amp section & the PSU rather than at the extreme right
also a switch in the BBC page next to the input jack that I assume is a
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
Workshop - link to An Engineering Perspective.
Broadcast Tech 1972.pdf
Introduction to Broadcast Transmission Technology
This is a
"Ladybird Guide" for people who don't necessarily have prior technical
Outside Broadcast and ENG
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.
Microphone data sheets.pdf
SiS paper 1969.pdf
13 Ch PCM Paper
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.
development of the BBC’s colour television service.
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
Contributions by David Porter:
Tricks of the Trade: 31
articles published in "Signal", regarding transmitter
The Marconi BD272 and B6124 HF transmitters - a video tour, preceded by
an introduction to Woofferton transmitting station.
7 (BD272); 8 and
9 (B6124). Click on the links to
view each these videos, which were uploaded to YouTube by the presenter
UK MW & LW
Broadcasting: the first 95 years. Reproduced with kind
Woofferton - 70 Years on
the Air. Reproduced with kind permission from
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.
Vintage BBC Transmitters - 2LO and AP
There are more technical articles in the
Designs Department, Training
Technical Instruction sections.