![]() The amp is about 2.5-3m above ground at the top of a PVC pipe. I took into account the alternative (I think more close to reality) explanation of how the pa0rdt works by VK1OD so description of the overall (temporary) installation is needed. I used an smd version of the J310, SOT23-3 package. I built the latter (including series inductor at the input) but changed the 560nF caps to 470nF and the 2N5109 to 2N3904. The latter is in the document listed as 3 Roelof Bakker, PA0RDT: The PA0RDT-Mini-Whip, an active receiving antenna for 10 kHz to 20 MHz. This latter also has a series inductor at the input to improve higher frequency reception. the mini-whip is actually a "scam" (that does not take your money)įrom there is accessible two versions of the pa0rdt schematic, one with 100nF coupling and bypass capacitors and one with 560nF coupling and bypass. ![]()
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