FrankinAu
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- FrankinAu
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What I ended up doing: mains RFI filter 250VA 15 volt 7.5 tap transformer 40kuF filtering 2 of 2N355 & LM317 regulator circuit good for 5 volts & 10 amps easy , weighs couple of Kgs with metal case heatsink and heavy transformer, my next pr…
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/19592#Comment_19592 Cant go wrong with old school linear power supplies, im now crying I thrown in the dumpster old computer bits with 5 amp 5 volt power supplies a few years ago thinking why…
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Codan Selcall Telcall based on 4/3 7 bit 100baud 170hz FSK, very much used in Au with 4 wheel drive remote travel nets, some also do GPS position beacons & short text messaging
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I use a 7.5-0-7.5 volt center tapped 100VA transformer rectifier 20,000uF filtering & linear regulator 7805+ 2 power transistors good for 5 amps & 5 volts, with RFI mains filter all in a metal box containing KIwiSDR unit and RF filtered eth…