Chelmsford Amateur Radio
Society
G0MWT, GX0MWT, GB5HF & M2T
Chelmsford Science & Industry Museum
For an On-Line Map to the Science and Industry
Museum, Sandford Mill
Chelmsford Science & Industry Museum is open to the public
on selected days during the year & this event was to celebrate
Marconi's Birthday which is on the 25th April.
CARS was invited to provide an Amateur Radio Station to
show the public what personal radio communications is all
about.
The day was warm and came after 3 weeks of good weather
with virtually no rain (bad for the gardeners & farmers).
492 members of the public turned up in a steady stream
all through the day so no event was heavily overloaded
as had happened previous years - thanks to the consistant
good weather.
Many of those who attended had connections with Marconi
in Chelmsford or nearby or other allied industries and
therefore appreciated the many displays.
The 2MT (Emma Tock calling) Hut which was used for the first Broadcasts in 1922.
Visitors looking at the many displays provided by Friends
of the Museum.
CARS provided an HF station in the 2MT Hut using the
Special Event Call-sign GB5HF in celebration of
Harry Heap, G5HF, CARS President who is 90 this year.
Martyn, G1EFL logging with Brian G3CVI on the microphone
CARS used the usual the long-wire aerial over the water
course which surrounds the Mill. This contributes
enormously to the strong signal which radiates from
this site however this does not completely overcome
the Sun Spot low cycle still which contributes to poor
propagation conditions.
Whilst the 2 stations were "on-air", Geoff, G7KLV & Colin,
G0TRM provided their now annual Morse demonstration.
Geoff G7KLV with Colin, G0TRM & their Morse
A visitor commented "I designed that handle on
the Mark IV TV Camera. I did it in 15 minutes and
a few days later it was made in cast aluminium".
Opposite the 2MT Hut is a 30KWatt Transmitter.
Brian is a Military Historian, with a desk at the
National Records at Kew and had researched much of
the information about Mr Hammett which is displayed
to the right and below.
For historical interest the Research Report on the life of Chris Hammett/G3AWR
is available with kind permission of Mr Brian Oldhham in PDF Format, below.
Click here to download the "Foreword".
It is an Adobe PDF Format of 6kBytes.
Click here to download the "Research Report".
It is an Adobe PDF Format of 32kBytes.
Having read either of the two files above, use your <- or click your "Back" Button on
your computer.
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©Copyright CARS 2007
Sandford Mill - Open Day in April 2007
12th
November 2007
Added Chris Hammett/G3AWR Archival Report.
Amended script to GB5HF Station photos with Martyn,
G1EFL.
Added photos taken by Brian Oldham.
Added the report & pictures.
Click here.
Introduction
This & the next 3 photographs are by Brian
Oldham,
many thanks for permission to publish them.
Visitors looking at the many displays provided by Friends
of the Museum
The Engine display area.
The Open Days also attract visitors, often with children,
who may never have realised that Chelmsford created much of
the technology which people now take for granted.
and CARS President, Harry, G5HF standing
Photographs by John, G8DET
BBC Essex, Steve Scruten on the microphone interviewing
Dr Geoff Bowles, Keeper of The Science & Industry
Museum - live!
Michael from Havering signing the diary & noting
that he was already in there from last year.
He had already had a contact with Jim M3RMI
at the upstairs station while mobile on the A12.
Martyn, G1EFL logging, Brian, G3CVI on the mic,
Tony,
G4YTG looking on with John, G3VMJ to the right.
Upstairs 2 Metre station.
Visitors Tony Lodge, Jim Salmon, M3RMI operating, Andy
Blaumom, M3TIU Logging, Ann (Wife of Jim & the excellent
tea provider) & Jenny Sullivan (Ex Mullard).
Jim was in QSO with Peter Best, G8BLS (from Ipswich).
Peter was with BT on the Microwave Group, Eastern Region
for many years and is known by many Amateurs.
At this time Peter was operating a SES from a Scout
Camp in Suffolk.
Visitors Chris & Jenny Sharpe from Danbury looking at Jim on
the microphone.
Members of the public (usually children) were encouraged
to type a message on a keyboard which produced a Murray Coded
punched tape. This was fed into a Tape Reader & the result
was transmitted to a Morse Undulator situated at the other end
of a long table. There the original message was produced
on a tape for them to take home.
Transmission demonstration. Chris G0IPU is on the left.
Photo by Brian Oldham.
Visitors Jenai (left), Jehan (centre) and Jasmine
with Naheed Chinoy looking on as Geoff, G7KLV
produces the tape message they had just sent.
Photograph published with kind permission of Mrs
Chinoy.
At the rear of the Marconi Hut the Friends of the
Museum have erected staging with many Marconi radios
and TV Cameras on it.
His name was Mr E J Cooper who was a Design
Draughtman in Baddow from 1943 on.
Mr Cooper on the handle he designed.
Chris Baker, G4LDS from Witham, used to test these TXs and spent
quite a time telling members of the public all about the equipment.
Thank you Chris for Hosting.
Upstairs 2 Metre station.
Chris Baker, G4LDS with the Drive unit out on the 30KWatt TX.
3Watts came in & 1KWatt came out to go to the Power Amp next door.
Vice Chairman Charles and Son-in-Law, Brian Oldham, by
the Radio Officers' Association memorial display to
the late Chris Hammett/G3AWR (1921-2006). The
display forms part of the ROA exhibition which is
featured within the Museum's Marconi Collection.
To put it in context a "Foreword" by CARS Vice President, Charles Shelton, G0GJS
is also available in PDF Format.
Do NOT click the X to Close the Browser or you will loose the link.
Hammett plaque.
The Chris Hammett Display Cabinet.
Photo by Brian Oldham
Ronnie, Wife of Vice President Charles & Celia, her Daughter.
James, 2E1GUA with the CARS Crest on his back looking
at the GB5HF Station.
Malcolm on the microphone while the others are in deep
conversation!.