Chelmsford Amateur Radio
Society
Chelmsford Science & Industry Museum - Sandford Mill For an On-Line Map to the Science and Industry
Museum, Sandford Mill
Chelmsford Science & Industry Museum has a series of Open Days on all
Sunday afternoons during August each year. CARS was invited to
provide an Amateur Radio Station on the 7th & 21st of August.
Both days were bright & dry which resulted in a good number of the public
attending. It was rewarding that among those who came, many (or their
family) had connections with Chelmsford or Marconi or other allied
industries and therefore appreciated the many displays.
CARS Members led by Brian, G3CVI & Geoff, G7KLV erected the long-wire
aerial over the water course which surrounds the Mill. This
contributes enormously to the strong signal which radiates from G0MWT.
On the 7th August, Brian G3CVI and Malcome G4KGL explored the high
frequency bands and managed contacts into Europe but ionospheric
conditions did not permit any real DX (long distance) contacts, the
most remote being to eastern Poland, near Gdansk. However we had
reports such as "Your signals are the loudest on the band".....
we were using 40 metres or 7.08 MHz.
On the 21st, the above team were rewarded by contacts (QSOs) into
South America...Paraguay and Costa Rica etc., on the 17 metre band
and that is real DX.
Our transceiver is the well liked FT847 running about 100watts output
and the aerial system "concocted" by Brian, G3CVI is an 80 metre
half-wave fed in the centre with open wire feeders and an MFJ type
antenna system tuner..so that we are able to work on any HF band.
The aerial spans a river which flows by the museum hence the "earth"
level is precisely known...(except in times of flood).
Teas were provided by Friend of the Museum and Editor of CARS Newsletter
Geoff, G7KLV. Besides providing an excellent cup of tea, Geoff also
acted as Chief Host and welcomed visitors as they came through the door.
Every event the public are invited to, the Friends of the Museum are able
to provide another new display, this month it was a cabinet
containing a beautifully etched PCB of a Chess Board surrounded by
Marconi emblems and was manufactured by Marconi Radar, maybe in Basildon.
It was a work of art. Also in the cabinet was some close circuit TV equipment
and a piece of an early (Victorian?) Trans-Atlantic Telegraph
Cable from Poldhu, Cormwall.
CARS Committee Member, Tony, G4YTG brought along a modern version of
the Marconi Kite which was originally manufactured in Chelmsford.
Tony's kite has the advantage of being made from rigcord nylon
which is lightweight, totally wind proof and supported on canes
which are pre-tensioned to give it the correct aerofoil section.
The Marconi kites were made of canvas which besides being
heavier when dry also absorbed rain which made then even heavier.
The wind was very light & variable so it was not possible to
fly the Marconi kite but a modern one was put aloft as a token.
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©Copyright G8DET 2005
Open Days Report and Pictures, August 2005.
10th December 2005
Amended the Return coding.
August 2005, added to the write-up of the report.
Click here.
Introduction
The Open Days also attract visitors, often with children, who may
never have witnessed a transmitter in action or heard the conversation
with other radio amateurs world wide.
Family group in the Marconi Hut listening to the crystal set.
From left to right - Jasmine, Mother Angie; Kieran Jordan & Miss
Marconi.
Photograph by Colin, G0TRM
Operating group in the Marconi Hut on Sunday 21st August 2005.
From left to right - Denis, M0FHA - Malcolm G4KGL - John, G8DET and
Ron, G3CAM on the microphone.
Photograph by Colin, G0TRM
From left to right - Ron, G3CAM logging - Denis, M0FHA microphone
Colin, G0TRM & visitor June Cline from Romford looking on.
Photograph by John, G8DET
Tea man & Chief Host, Geoff, G7KLV.
Photograph by John, G8DET
Display cabinet - cable in the centre.
Photograph by John, G8DET
Kite man Tony, G4YTG - look at his licence plate
Photograph by John, G8DET