6 May 2010

More VLF DX TX tests by DK7FC planned

Stefan DK7FC is applying for permission from the German authorities to erect a 300m long kit supported antenna for his next transmitting tests on VLF. Before this is possible he hopes to test with a 200m long kite antenna. The main concern now is summer noise levels on VLF and the effect this will have on DX possibilities. Some ionospheric propagation simulations by SQ7MPJ suggest that attenuation over an 800kms+ distance would be a few dB less if the TX frequency was reduced to around 5-6kHz instead of 8.97kHz because of the effect of the D-layer.

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