Ham radio, HF propagation, DXCC/WAZ/IOTA, Antarctica
Hi all, I just finished my holidays and could - put down the HexBeam to clean it and to raise it up again at 35 feet (it was at 20 feet high before....) - Install an inverted-V dipole with the APEX at 25 feet high (so quite omnidirectional)...Goal is...
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Hi all, As for all those who contacted VP6DX, I received the small book for my 80/40/20/17 and 15m QSO's (and another one for my 17m QRP QSO !!!!!!!!!!!!!) Many thanks to all the team for this "TOP" expedition, one of the est for the last few years for...
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Hi all, An international team of experienced DXpeditioners will operate from Pulau Layang Layang in the Spratly islands in early March 2009. The callsign will be announced shortly before the operation. More info on : http://www.spratly2009.com/ I've already...
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By advance, good luck to all, this will make a LOT of noise on the bands !!!!!!!!!!!!!! Start Date: November 12, 2008 End Date: November 26, 2008 Coordinator: ARRL Record ID: 5461 Requisitioned by: Harry T. Flasher Call Sign: AC8G Address: 7425 Barr Circle,...
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I decided to update the previous block diagram adding: - More "simple" description of the TX/RX relay from Ramsey. - A few LED's that will be helpful when switching ON/OFF such or such block. - updated DPDT block diagram... Blue color wires are HF signals....
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Hi all, Here is the diagram of the entire HF preamp + filters that I'm putting in place. The RF detection will be done through a RFS-1 kit from RAMSEY (supporting up to 100W). This also could be done by adding a DPDT relay using Tr-Ry signal from the...
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Hi all, I've just finished to test the preamplifier (alone) as indicated in a post. Waouh, I'm impressed, everything worked very closely to simulation results !!!!! For all tests, Power supply was a regulated +12V. Total current consumed is 120 mA. 40m...
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Today I received 9X0R QSL for20/17/15/12m QSO with 100W AND my 17m QRP QSO... I'd like to thank the team for sending a separate QSL as QRP..Indeed, many expeditions don't make the difference between High Power and QRP on QSL labels !!!! Gracias ! Ron...
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Hi all, While going on workign on the filter + preamplifier, I wanted to post here the RX antenna I plan to build for 40/80m... This is highly inspired from K6SE flag antenna, but I wanted to make it shorter to see how are impacted the over-all performances....
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So here we are, this is a picture of the "test filter" : As you may see, I added 68 pF capacitors in parallel of the 680pF on the 40m filter, this sharpens the bandwidth, while increasing slightly the insertion losses. Corresponding schematics :(measured...
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