Radiofan_01
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https://forum.kiwisdr.com/uploads/786/1GPH911E22ZE.jpg Sorry for posting some advertising like. Nevertheless I would like to discuss the advantage or disadvantage of so called LAN-Isolators. Tried out one of the special transformers directly connect…
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And the remaining noise spectrum is caused by the internet access router itself, LAN cable and so on. If router is switched off, the QRM between approx. 7 and 14 MHz disappears instantly. (On local operation mode that interference is no more there e…
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https://forum.kiwisdr.com/uploads/356/A5C54VX7LZP0.jpg Adding some pictures. Main problem was, to get an appropriate metal case, which does not produce an extra acoustic hum by magnetizing caused of housing sheet iron
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Hello, My homebrewed PSU seems a little bit oldschool and oversized. Transformer 120 VA and a regulator IC µA78H05SC, in a TO-3 housing and mounted on a 0.5°/Watt heatsink. The heatsink temperature reaches 35° Celsius on an ambient temperature of 27…
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Hi, maybe quite off topic, but could probably help explaining some mysterious failure. Some consideration in where RF power actually takes effect. Not even on transmitter's antenna, as it should be. Me performed a testing on CB radio, and after 5 se…
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https://forum.kiwisdr.com/index.php?p=/discussion/comment/17305#Comment_17305 what a coincidence. I have bought two of this linear PSU in which one for KIWI1 and another one ready for KIWI 2(order has been placed). DC output carries very low ripple …