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ZR1WLH & ZS1HJH doing final assembly of the antenna before the meeting |
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Hendrik / ZS1EEE contemplates the antenna in its temporary tuning location. |
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Rob / ZS1SA opens the meeting |
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Hendrik shows an example of an SDR-enabled handie |
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Hendrik shows an RTL/SDR dongle |
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There are Arduino-based component SDR kits |
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Diagram of the traditional HDR (Hardware-Defined Radio) signal path with RF amp, oscillator, mixer, detector & audio stage |
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An intermediate phase - Software Controlled Radio |
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Software Defined Radio, where the whole signal path is processed digitally by software |
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Three-dimensional graphs illustrate the Quadrature principle. Above is an example of Frequency Modulation |
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Amplitude Modulation, showing the variation of amplitude of the signal over time |
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The classical SDR waterfall and oscilloscope display |
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A comparison of various SDR specifications and prices, ranging typically from $300 to $1100 (and more!) |
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ZS1HJH checks readings using his Network Analyzer |
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Ian / ZS1SX (right) brings some goodies along to the SwopShop |
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Tea, biscuits and catching up from last month |
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Yet again, the Club's ricketty wooden ladder defies the laws of physics and remains intact and vertical at this crucial stage |
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Rob does some last-minute soldering work |
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Walking up the antenna |
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Some branches had to be held out of the way as the antenna went up |
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We had to temporarily lower the antenna again to disentangle some of the guy wires |
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Danny / ZS1BL fixes the mast to the upper mounting bracket... |
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...while the strong arm of the Ward holds the mast in place! |
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Club members admire their handiwork |
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The satisfying feeling of a job well done! |