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Automatic Nicad charger by Eric Gaze, G8NKA ONE OF MY FAVOURITE bits of kit is a handheld transceiver. If like me, you were startled at the cost of manufacturers’ bat-tery packs, you probably opted for an empty case and at the next rally bought yourself enough batteries to fill it…. Continue reading
CTCSS Tone encoder The circuit is shown in Fig 2. It’s centred around a purpose-made IC, the FX315, which has been used in professional circles for many years. I have built a number of these units for my own use. It draws only 1 .5mA in use, so it’s eminently… Continue reading