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UQRSS experiments on 20 meters...
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"Philip"
Had a one off crystal made by QuartSlab...Bit expensive but worth it I reckon..
The crystal frequency is 14.097100 HC49U 30pF parallel.. With C5 removed, I can tune below/through and above the WSPR portion of the 20 meter band. Running a simple one transistor (2N3866) external PA fed from the "C OUT" connector on the kit PCB.(internal PA turned off). This PA is running from 12 Volts and at this frequency, I get almost 500mW out (PA runs 900mW on 40 meters). Using the external PA keeps any heat away from the kit oscillator and reduces drift by a significant amount... Crystal and capacitors around the osc circuit are all plugged in on this kit so I can experiment with different values/bands without risking damage to the PCB.. My LPF is external as well and selected to match the band I want to use... Anyhoo, first run this evening into my new 132' Windom shows a good selection of spots... Over 10 from the states, one VK, one from Uruguay, two from Brazil and goodly collection from Europe... Great fun Philip G4JVF |
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"p19547ct"
20 meter WSPR screen grab in my photo album (G4JVF) on here...wsp20.jpg
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--- In QRPLabs@..., "Philip" <pcteee@...> wrote:
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Tony Volpe
I've ben comparing our spots Philip on the two bands. It seems that 20 shuts down much more at night than 30 does. I had USA stations all night long more or less, but none from South America. I wonder how many south American stations are on 30. I should look at the ACTIVITY tab and see. I got noVK stations in the last 24 hours, which is a come down from recent days, but the SFI is falling steadily and has been for about five days, lessening my extreme DX gradually.
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Fascinating stuff, as you say. What do you think is happening with the spate of new kits (V1.5) that are running at one eighth speed? Could a new bug have crept in to some of the V1.05 and not others. Very strange things being reported there.
bzb On 16 September 2012 23:28, p19547ct <pcteee@...> wrote:
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