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Video Night 2022 by Peter GM4DTH at ECVS.
‘The Secret Wireless War - Black Propaganda’ (Grindlewald Productions)
The RCA 600kW "Aspidistra" Transmitter.
Development and content of the WW2 secret UK "black" radio broadcasts to Germany.
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Malcolm Fergusson talked about the Ultra secret (the WWII German communications decoded at Bletchley Park) and the SCU-3 (Special Communications Unit) located in 1940 at Cockburn Farm near Balerno (where he lives). Attendance was a great 26, including Zoom. Click for slides.
Malcolm is a retired Superintendent Technician, Physics & Electrical Engineering, at Edinburgh University & an Honorary Life Member of the Museum of Communication.
Cockburn Farm, Balerno.
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LRS member Brian Howie GM4DIJ talked about OpenEMS, a Free Electro-Magnetic Simulator at the LRS meeting on 22 Feb 22 at the Braid Hills Hotel. Brian writes:
"OpenEMS is a free open electromagnetic field solver using the Finite Difference Time Domain method. It was created by Thortsten Liebig at the General & Theoretical Engineering University in Germany. FTDT is a time-domain approximation of Maxwell's equations to calculate the results. I have described antenna modelling using NEC2, mainly for wire antennas in previous talks".
Brian Howie GM4DIJ.
Click video recording. (Tnx Colin GM4EAU).
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At the LRS meeting on 9 Mar 2022 at the Braid Hills Hotel, and on Zoom, John Cooke GM8OTI talked about "Astrodynamics without the maths - how to fly spacecraft".
The Rocket Scientists!
John Cooke GM8OTI
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On Wed 9th Feb 2022 at the Braid Hills Hotel James Gentles GM4WZP (HP-retired) gave a great talk on the History of the Pocket Calculator - 5000 years and counting. It included his own collection of HP pocket calculators from his 30-year career at HP.
James Gentles GM4WZP
Click for full report and video recording.
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