27 June 2012 - 1512 - 0528 UTC - 144 MHz WSPR Study

This is a time lapse screen capture of a 144 MHz WSPR contact between N6GN and K6PZB in Santa Rosa, CA (CM88) and KP4MD and WW8L near Sacramento, CA (CM98) at 80 miles distance.

Time period: 27 June 2012 - 1512 UTC - 28 June 2012 - 0528 UTC

The main lobe of the halo antennas at KP4MD was directed at 270°

KP4MD Station:
Exciter: Flex-1500 running Power SDR 2.2.3
Transverter: Elecraft XV144
Linear Amplifier: RM KL-145
Tranmitted power output: 50 watts
Transmission line: 46 feet of Belden 8214 RG-8/U foam coaxial cable (1.6 dB measured attenuation)
Antenna: 2 stacked halos at 18 feet above ground (7.9 dBi theoretical gain)

The screen was captured with CamStudio software at 1 frame every 60,000 ms. This AVI file playback speed is 2 frames per second.

http://www.qsl.net/kp4md/144_mhz_wspr.htm

Видео 27 June 2012 - 1512 - 0528 UTC - 144 MHz WSPR Study канала KP4MD