All begun with my interest in satellites and Seeed having a sale on 5cm x 5cm pcb's. Why cut coax when you can use something from Mini-Circuits? This board forms a feedpoint for a 70cm RHCP yagi or turnstile for listening to amateur radio satellites. It is based around a Mini-Circuits QCN-3+ 90* power splitter. It is specified for 220MHz-470MHz, so it could also be used for the USA 220MHz band, but why on earth would you need RHCP there? http://194.75.38.69/pdfs/QCN-3+.pdf The splitter is specified to survive 7W input power when it's at 100*C, so it's a perfect companion for a handheld or ft-817. The board looks a bit slapdash as it was drawn and sent for manufacturing in about 2 hours start to finish. ![]() http://i.imgur.com/Obmg60n.png ![]() http://i.imgur.com/w86BLFN.png ![]() http://i.imgur.com/cWRL14G.png http://imgur.com/a/1SEKJ |
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