A PHOTO REPORT ON THE MEETING HELD ON
8 APRIL 2001
RUTHERFORD APPLETON LABORATORY
Some 44 amateur microwavers signed in at the annual microwave "round table" meeting held at RAL this year. Although the attendance was a little lower than previous years, the event was very successful. The meeting was preceded by a dinner held on the Saturday night and organised by Geoff, G3NAQ. Those attending that had a great time. Unfortunately an RSGB show was also scheduled for the same weekend and a few (less "switched on" ?) folk chose that instead of the gathering of microwavers at RAL!
A good selection of surplus parts and gear was brought by visitors for the swap and barter tables but what would have been snapped up immediately just five years ago (such as 10GHz TWTs and waveguide items) now seems to be relegated to "junk" status! Your webmaster failed to trade his 4 watt 10GHz TWT, complete with power supply and reluctantly brought it back home, to the "horror" of wife Judy who thought at least one piece of the Old Man's junk had gone for ever!
The main talk was given by Dave Stockton,
GM4ZNX, who is a chief design engineer with Agilent. He gave us a facinating
and humorous insight into the design and associated problems of noise measuring
equipment. This was following by a test session, with the emphasis on noise
figure measurement using some of the latest equipment. One amateur was
seen with what appeared to be around a dozen preamplifiers waiting his
turn at the test table! We hope he was pleased with the results!
The first event after lunch was the presentation of the G3BNL Trophy by the Chairman of the RSGB Microwave Committee, Julian Gannaway (extreme right in this photo) to the Wessex Millimetre Wave Group (see here left to right: G3FYX, G8BKE and G3PYB ... but missing G8ACE who could not attend) for their outstanding work in equipment construction and operation at 76GHz. They thoroughly deserve the award! Details of their achievements can be found elsewhere on this website.
After that we were treated to a
most interesting talk and demonstration of amateur lightwave communication.
David, G0MRF and Allan, G8LSD brought their laser diode transceivers for
their talk and were flabbergasted to see that others had brough lightwave
gear as well! We were priviliged to be at what must have been the largest
gathering of UK lightwavers the country has ever seen!
In addition to the four sets of gear
brought together by David and Allan, Barry, G8AGN brought his lightwave
transmitter and Paul, G6UAJ showed his impressive reflector telescope-based
system. He had literally kept all this "in the dark" as even his near neighbour
Tim, G3KEU, hadn't known of Paul's experiments at these ultra high frequencies.
For those who want to find out more about the simple-to-make lightwave
gear of G0MRF, you can visit David's excellent website by clicking this
The light wave talk was followed
by an informative and thought provoking talk on yagi antenna construction
for the 1.2 and 2.3GHz bands. This was given by well-known EMEr Peter Blair,
G3LTF. He demonstrated how long yagis for these bands are easy to make
from aluminium tube and plastic plumbing fittings, cheaply and easily obtainable
from hardware stores.
A great deal of enjoyment is always
obtained from the chit-chat that takes place between microwavers during
the informal sessions in the lounge area. The latest 76GHz equipment built
by Roy,G3FYX and Peter, G3PYB was being air tested across the room
(SEE PHOTO LEFT) while others "chewed the rag" with friends usually worked
over the microwave bands.
Our microwave hobby is something to treasure. Let us all work hard to keep it that way. Keep on building equipment and, above all, USE IT!
Finally here are some close ups of
the 76GHz and lightwave equipment seen at the meeting.
G3FYX's 76GHz transmitter
G8LSD's LASER DIODE TRANSMITTER
G8LSD's LASER DIODE TRANSMITTER
G3PYB's 24GHz transverter (note
the Milliwave half watt PA with heatsink)
G3PYB'x 24GHz TVTR is very compact!
The neat, uncluttered 76GHz system
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