Welcome to Tropical band

To most people the phrase "tropical bands" bring a pretty clear picture to mind - a bunch of shirtless guys playing calypso music. But to experienced shortwave DXers those two little words express the most challenging and enjoyable part of the radio hobby. The phrase kindles memories of a DXer's best catches and favorite QSLs, of exotic stations, music and of early morning listening sessions. (Don Moore)
I like the "Tropical band" name for new 60m allocation. (OK1RP)

Effective from 1st Jan 2017 please paper QSL via OM-bureau only.


Monday, January 24, 2011

Solar flux/Sunspot index vs. QSOs logged

Hello,

as I got some emails regarding the relationship between the Solar flux, Sunspots, A-index and QSOs on LB there I am posting quick analyze from last few weeks...


All green line markers in the chart represents more than 2 QSOs on 60m band and 160m band outside EU in my log. In most cases I worked 5-6 QSOs on the low bands using 100W and my small antennas (base coil loaded half sloper for 160m w/apex 11m and inverted Z dipole w/apex 9m).

All of the good nites corresponding to a bit higher A-index and low Solar flux/Sunspot numbers in the chart.

Any comments from LB DXers are highly welcomed.

73 - Petr, OK1RP

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1 comment:

  1. K5YYJanuary 25, 2011 at 9:43 PM

    Higher flux and SSN creates more D layer adsorption and more QRN as you see on 75 meters. With less SSN and Flux, the D layer is quieter, although perhaps only slightly, but enough to hear stations that are at the noise level with higher SSNs present.
    de K5YY

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