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Info – Page 2 – Darwin Amateur Radio Club

Alinco Power Supply

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  The Alinco power supply for amateur radio has been around for a while but this latest model has some extra features. All switch mode power supplies or their harmonics can interfere with some of our bands. It appears to … Continued

Radiation Resistance, SWR and Resonance

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Radiation resistance is that part of an antenna’s feed point resistance that is caused by the radiation of electromagnetic waves from the antenna, as opposed to loss resistance which generally causes the antenna to heat up. The total of radiation … Continued

What is Return Loss?

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In telecommunications, return loss is the loss of power in the signal returned/reflected by a discontinuity in a transmission line. This discontinuity can be a mismatch with the terminating load or with a device inserted in the line. It is … Continued

The Darwin Disaster December 1974

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The following is a scan of an article written by the late Pierce Healy  VK2APQ in the now no longer published March 1975 edition of  Electronics Australia Magazine. This article details the involvement of Amateur Radio in Post cyclone communications. … Continued