Welcome to and Neville Roberts' Home Page!

Last updated during June 2017


RSS Consultancy
Physics, Engineering and Technology
Journalism, Hi-Fi, Music and Television
Orchid Photographs

Weather Satellite Images



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View the latest weather satellite images that have been recorded directly from the satellites as they pass over my location in Dorset, UK.

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Saved images of hurricanes and wide composites.

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Listen to a sample of the APT audio received from one of the NOAA satellites that contains the visible and infrared information used to generate the images.

Physics, Engineering and Technology


The Institute of Physics
Home Page

European Physical Society
(formerly The IEE)
The Institution of Engineering
and Technology Home Page

European Federation of
National Engineering Associations

The Engineering Council

RSS Consultancy

Journalism, Hi-Fi, Music and Television.

Hi-Fi Choice Magazine

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From May 2012 to date

Issue 358 -> onwards

I am a regular contributor to Hi-Fi Choice magazine. Copies of articles are available to subscribers on the Hi-Fi Choice website

I have written a number of articles for other audio and lifestyle magazines over the years. Reproductions of the submitted articles as PDF files from 2001 to 2012 are available below.

Hi-Fi World Magazine

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April 2001

DIY Supplement 57

110Kb

Design and Construction of a Quality Stepped Attenuator

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November 2001

DIY Supplement 61

114Kb

Building Quality DIY Mains Power Leads

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November 2001

DIY Supplement 61

121Kb

Upgrading the WAD Series II Modular Preamp

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April 2002

DIY Supplement 64

422Kb

Review - Njoe Tjoeb 4000 CD Player

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April 2002

DIY Supplement 64

155Kb

A Moving Coil Cartridge Head Amplifier

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May 2002

DIY Supplement 65

189Kb

Review - Origin Live Turntable Kit

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August 2002

DIY Supplement 67

376Kb

Upgrading the Njoe Tjoeb 4000 Valve CD Player

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February 2003

DIY Supplement 71

208Kb

Cartridge Alignment with the Vinyl Essentials Test Record

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October 2003

DIY Supplement 75

202Kb

Upgrading the Upgrade –The New Origin Live Turntable Motor

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April 2004

DIY Supplement 78

170Kb

The New Origin Live Ultra Turntable Power Supply

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December 2004

DIY Supplement 80

357Kb

Stepped Attenuators – The Final Instalment?

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February 2005

DIY Supplement 81

605Kb

A Touch of Glass

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April 2005

DIY Supplement 82

558Kb

The ProLogue One AABB Upgrade

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April 2005

DIY Supplement 82

267Kb

Tube Hoops

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August 2005

DIY Supplement 84

255Kb

HD83 Extreme Makeover

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October 2005

DIY Supplement 85

147Kb

Book Review - Sound Design by David Attwood

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October 2005

DIY Supplement 85

256Kb

An Eighth-Wave Transmission Line Loudspeaker

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March 2006

Vol.16 No.1

323Kb

The History of Vinyl & Phonograph Cylinder Recording + audio samples

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April 2007

Vol.17 No.2

278Kb

Rewired for Sound - rewiring a tonearm

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April 2007

Vol.17 No.2

81Kb

On The Run - the evolution of my Hi-Fi system

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June 2007

Vol.17 No.4

122Kb

Soundbites – Logitech Wireless Hi-Fi Link

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August 2007

Vol.17 No.6

78Kb

Soundbites - Black Rhodium Cables

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September 2007

Vol.17 No.7

279Kb

Arms Length Review - The Audio Origami Tonearm

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September 2007

Vol.17 No.7

58Kb

Soundbites - Sennheiser OMX90VC Earphones

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September 2007

Vol.17 No.7

232Kb

Glass Time - The SuperTubeClock Valve CD Clock Upgrade

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February 2008

Vol.17 No.12

294Kb

Olde Worlde - The Reel Thing - The Sony TC-377 Open Reel Recorder

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October 2008

Vol.18 No.8

170Kb

Soundbites - Philips GoGear MP3 Player

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October 2008

Vol.18 No.8

159Kb

Soundbites - Ringmat CDi Blue Statmat & Dampers

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January 2009

Vol.18 No.11

382Kb

The Holy and the IV – The PrimaLuna ProLogue Eight Upgraded

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March 2009

Vol.19 No.1

122Kb

Soundbites - TJ Full Music Valves

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June 2009

Vol.19 No.4

58Kb

Soundbites - Sonic Freedom Offspring Spikes

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June 2009

Vol.19 No.4

136Kb

Soundbites - Black Knight Figure of 8 Powercord

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October 2009

Vol.19 No.8

350Kb

Buy buy Blackburn! - A New Valve Range from Blackburn MicroTech Solutions

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December 2009

Vol.19 No.10

358Kb

A History of Test Card Music

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January 2010

Vol.19 No.11

274Kb

Spinning the Bottle

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January 2010

Vol.19 No.11

265Kb

Kinetik Energy – The New ISOkinetik Modular One Turntable

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February 2010

Vol.19 No.12

183Kb

A New Concept? – The Clearaudio Concept Turntable

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February 2010

Vol.19 No.12

163Kb

Review - ISOkinetik Upgraded Rega Turntable

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March 2010

Vol.20 No.1

151Kb

The Rega RB1000 Tonearm

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May 2010

Vol.20 No.3

320Kb

TEAC for Two - The TEAC T-H380DNT Stereo Tuner

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March 2011

Vol.21 No.1

222Kb

Out of the Blue - The Kiseki Blue NOS Cartridge

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July 2011

Vol.21 No.5

163Kb

Cable Sound - Do Cables Make a Difference?

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December 2011

Vol.21 No.10

385Kb

Squeezing More Out of a Squeezebox!

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September/October 2012

Vol.22 Nos.7 & 8

1.4Mb

Trough-Line Triumph!

audioXpress Magazine (USA)

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July 2008

audioXpress

1.2Mb

CDs Under Canvas - The Tentlabs DIY CD Player

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November 2009

audioXpress

4.3Mb

A New Approach to Tube Design

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November 2016

audioXpress

655Kb

The Vinyl Frontier (the full copy of this article is available to subscribers on the audioXpress website)

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June 2017

audioXpress

655Kb

Head Space (the full copy of this article is available to subscribers on the audioXpress website)

UK Laomao Lifestyle Magazine (China)

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July 2015

UK Laomao

In Love with Orchids

For Hi-Fi enthusiasts wishing to build their own stepped attenuator to replace the volume control in their amplifier, I have written two Javascript programs to calculate the values of the resistors required; one for a resistor string attenuator with up to 24 steps and the other for a shunt attenuator with up to 50 steps. I hope you find them useful.

If anyone wants to test 300B triodes on a valve tester that doesn't support these valves, 331Kb click here to read how I solved the problem with my B&K Dyna-Jet Valve (Tube) Tester Model 606.

For anyone interested in television engineering, I wrote an article for Wireless World back in 1979 on the design of a unit to electronically generate colour television pictures from a black & white source. More recently, I wrote an article for the Test Card Circle on Baird 30-line television and have included both articles below.

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August 1979

Wireless World

1,419Kb

Colour Synthesizer Design for the PAL System

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April 2004

The Test Card Circle Magazine

767Kb

30-Line Television: Baird for All to See!

If you need a simple colour test pattern on your monitor, click on the Colour Bar Generator link, or on Colour Bar Generator with Tone for the colour bars with 15 seconds of 440Hz tone followed by 5 seconds of silence.

Other interests include light and classical music, especially baroque. All of my classical recordings are listed in 726Kb Album_Details.PDF.

I also have a comprehensive collection of the excellent quality light music used to accompany the BBC test card and am a member of the Test Card Circle. I have a copy of virtually every tape from 1959 through to 1982 on CD. The tapes were 1/2 hour long up until 1972 and then were 1 hour in length. Most of these CDs have been made from the original BBC coded music master recordings and the later ones are therefore in stereo!

In addition to the BBC test card music, I have copies of the music used to accompany the Channel 4 test card when the channel started broadcasting on 2 November 1982. I have copies of the first nine 1-hour tapes used, again from the stereo masters, as well as the original Channel 4 theme. I also have a collection of library music recordings (recordings that were not commercially available) and much of it was used for television theme tunes and interval music.

Finally, I have written a simple timer program that helps keep track of the length of phone calls, which can be very useful if you wish to make sure you keep them less than 1 hour to qualify for 'free' UK calls, if you have that with your phone plan.
You can access the Phone Timer here.

Orchid Photographs

Prior to 2000, the orchid photographs were taken on a Nikon FE 35mm camera using the standard Nikkor 50mm f1.8 lens with off-camera flash and extension tubes as necessary. The photographs were taken on Fujichrome 'Sensia' ASA100 or 'Sensia II' ASA200 colour slide film. These slides were then scanned on a Nikon 'Coolscan' scanner.

From 2000 until 2004, the photographs were taken on a Nikon Coolpix 995 digital camera. From 2005, a Nikon DSLR camera has been used (a D70 from 2005-2009, a D90 from 2010-2011, then a D7000 from 2012), together with an AF Micro Nikkor 60mm f2.8 D lens. For illumination, either an off-camera Nikon SB600 flash unit with diffuser or a ring LED unit on the lens was used.

The resultant JPGs have been scaled down for the web - click on the thumbnail to download the picture.

Tropical Orchids



Brassia verrucosa

Cattleya Braziliensis

Cattleya velutina x Laelia Crispa

Coelogyne Cristata

Coelogyne Cristata
'Alba'

Coelogyne fuliginosa

Coelogyne fuscescens

Coelogyne Intermedia

Coelogyne lawrenceana

Coelogyne Massangeana

Cymbidium hybrid

Cymbidium hybrid yellow

Cymbidium hybrid yellow
(focus-stacked)

Cymbidium Alexanderi
'Westonbirt'

Cymbidium Alexanderi
'Westonbirt' (7 blooms)

Cymbidium Minneken
'Pink Tower'

Dendrobium Ainsworthii

Dendrobium Delicatum

Dendrobium Delicatum spray

Dendrobium Golden Blossom
'Sunset'

Dendrobium Hastings

Dendrobium kingianum

Dendrobium Maihime
Beauty

Dendrobium Nobile

Dendrobium Pink Doll
'Elegance'

Dendrochilum latifolium

Disa Diores
'Inca Warrior'

Disa uniflora
'Firebird'

Encyclia cochleata

Epidendrum ibaguense

Epidendrum Prismatocarpum

Laelia virens

Laeliocattleya
Meadow Gold

Lycaste Skinneri

Masdevallia Teipels
Mary Candy

Maxilaria Praestans

Miltonia Kasserine
x Franz Wichmann

Neobenthema gracilio

Neobenthema gracilio
spray

Odontioda Fireflower
x Odontoglossum Hallii

Odontioda Flintstone

Odontioda Galaxy

Odontioda Harry Baldwin x
Carl Keyes x Elaine Herioda

Odontioda Honiton Lace

Odontocidium Tigersun

Odontoglossum
Bictoniense

Odontoglossum Luto Purpureum
x Mach Two

Odontoglossum Pulchellum

Odontonia Susan Bogdanow

Oncidium goldiana

Oncidium
ornithorhynchum

Paphiopedilum Insigne

Paphiopedilum
lawrenceanum x ciliolare

Paphiopedilum Maudae

Paphiopedilum Petronella
x Queen Anna

Paphiopedilum Nitens

Paphiopedilum Rosy Dawn
'Alba'

Paphiopedilum Rosy Dawn

Paphiopedilum Rosy Dawn
(2 blooms)

Miniature
Phalaenopsis hybrid

Phalaenopsis hybrid

Phalaenopsis hybrid

Phalaenopsis hybrid

Phalaenopsis hybrid

Phalaenopsis Sussex Pearl

Phragmipedium
Don Wimber

Pleurothallis

Polystachya Pubescens

Rossioglossum grande

Sarcochilus Fitzhart

Sophrolaeliocattleya Jewel Box

Stenoglottis longifolii

Vuylstekeara Cambria
'Orange'

Zygopetalum intermedium

Zygopetalum 'Ladybird'


'Hardy' Terrestrial Orchids



Anacamptis pyramidalis

Anacamptis pyramidalis
(Badbury Rings, Dorset)

Anacamptis pyramidalis
(spray)

Bletilla striata
'Soryu'

Calanthe Kozu
(focus-stacked)

Cypripedium Emile

Cypripedium fasciolatum

Cypripedium formosanum

Cypripedium Gisela

Cypripedium Gisela
plant (focus stacked)

Cypripedium Hank Small

Cypripedium parviflorum
v pubescens

Cypripedium Ulla Silkens
(in garden)

Cypripedium Ulla Silkens

Dactylorhiza fuchsii

Dactylorhiza fuchsii
(Badbury Rings, Dorset)

Dactylorhiza fuchsii
(spray)

Dactylorhiza fuchsii
(St.Leonards, Dorset)

Dactylorhiza praetermissa
'Anada' (in garden)

Dactylorhiza praetermissa
'Anada'

Epipactis gigantea
(in garden)

Epipactis gigantea plant
(in garden)

Epipactis gigantea

Epipactis Renate

Habenaria radiata

Listera ovata
(Batcombe, Dorset)

Ophrys apifera
(in garden)

Ophrys apifera

Orchis mascula
(Badbury Rings, Dorset)

Orchis morio
(in garden)

Orchis morio

Platanthera chlorantha
(Badbury Rings, Dorset)

Platanthera chlorantha
& Dactylorhiza fuchsii

Pleione praecox

Pleione tongariro

Serapias lingua


Orchid-related Links



Bournemouth Orchid Society

Hardy Orchid Society

Laneside Hardy Orchids

The North of England
Orchid Society

The Orchid Mall

Orchid Research Newsletter -
Kew

American Orchid Society

Bournemouth Natural
Science Society

British Orchid
Council

Wessex Orchid
Society

Orchid Accessories

Orchid Supplies UK

British Paphiopedilum Society

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Thank you for your interest!


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This page has been accessed times since September 2004.


(c) 1998-2017 Neville Roberts BSc CEng CPhys FIET MInstP