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October 2017

Underground communications – Rob Gill G8DSU

October 6 @ 8:00 pm - 10:00 pm
Blackwell Hall, 90 Uxbridge Rd
Harrow, HA3 6DQ United Kingdom
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Rob Gill G8DSU is the editor of the quarterly Cave Radio and Electronics Group Journal, which reaches issue 100 in December 2017. Rob will talk on the underground communications systems available to cavers and cave rescue teams today and look at current developments, including data transmission and the use of HF and VHF, frequencies not usually associated with through-the-ground communications. Other underground applications for radio and electronics will be discussed and illustrated with some of results of sophisticated cave surveying and visualisation work.…

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Don’t miss * * * * Jerry Stone – Time and Space * * * *

October 27 @ 8:00 pm - 10:00 pm
Blackwell Hall, 90 Uxbridge Rd
Harrow, HA3 6DQ United Kingdom
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How our measurements of time developed from our observations of space A return booking for this inspiring and entertaining speaker.  Bring the family! Our measurement of time is derived from our study of the skies. Astronomy is the oldest science in the world, and gave us our day, month and year. Yet these divisions don't last as long as most people think! In addition, simple astronomical observations and timings can tell us remarkable things about Earth's orbit around the Sun.  Take…

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Clocks back

October 29 @ 1:00 am - 1:30 am

Sunday afternoon at Old Redding

October 29 @ 2:00 pm - 5:00 pm
Old Redding, Old Redding Car Park
Harrow Weald, Middx HA3 6SH United Kingdom
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Informal gathering – any of you around on Sunday afternoon might like to meet up at Old Redding from 14.00h onwards, with portable / mobile equipment, or just come along for a chat. If the weather is uncertain, listen to GB3HR to see what people are doing. If you get there at 14.00 and there’s no-one there, hang around or give a call on GB3HR.

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November 2017

Know Your Tools – Colin G1IGA & Brian G3YKB

November 3 @ 8:00 pm - 10:00 pm
Blackwell Hall, 90 Uxbridge Rd
Harrow, HA3 6DQ United Kingdom
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A demonstration and practical evening. Our annual Construction Contest will be held in December. To help you practice your skills, Colin and Brian will, tonight, be providing a selection of hand and low voltage power tools which members may practice using for home construction.  Brian will also demonstrate how to fit crimp connectors to RG58 coax cable. BNC (male) to BNC (male) jump leads, up to one metre in length, will be on sale at £2 each.

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