For your information,the New Zealand Short Range Devices(SRD)General User Radio License(GURL)mentioned in your article on the 433MHz UHF Data Repeater in the May 2019 issue has been superseded.The new-one is at: https://gazette.govt.nz/notice/id/2019-gol588 The changes are listed at the bottom,none of which affect the 433MHz band.While you can operate SRD repeaters under the GURL,the device still needs to meet the applicable standard at a minimum(which can be found at https://gazette.govt.nz/notice/id/2016-go2007).More information for the requirements can be found at siliconchip.com.au/link/aaqa and it would be at level Al.The supplier would be anyone who manufactures a unit.Jeremy Logan,Radio Spectrum Management,Ministry of Business,Innovation & Employment Wellington,New Zealand.Electrical safety should be taken seriously Silicon Chip is,without doubt,the best electronics magazine worldwide;I look forward to mine every month.With regards to your editorial in the February edition regarding servicing of electronic equipment,I always suggest using a workbench wired via an RCD breaker as an absolute safety necessity.Further,all equipment on the bench to be serviced,or currently being serviced,should be powered via an isolation transformer with a single AC outlet for the appliance under test(no Earth pin).
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