[digitalradio] Re: Propagation: 20M all day now with digital modes

2009-05-19 Thread Marc PD4U
Last night I heard W4UAT untill 01:12 UTC and heard W0ZD untill 02:50 UTC. The first ststions from the East were UU6JF at 03:46 UTC and UA4HDB at 04:03 UTC. All SSTV stations. 73's de Marc, PD4U http://www.pd4u.nl _ Se

[digitalradio] Re:sstv

2009-05-02 Thread Marc PD4U
. In busy/QRM situations it sometimes helps to go faster, and for instance use B/W 8, that only takes 8 sec. If you receive only faint signals it is better to use the modes that take more time like martin 1 [114 sec], scotty 1 [110 sec]or even scotty DX [269 sec] 73's de Marc,

[digitalradio] Re: Solar Cycle 23 Sunspot Group Re-emerges

2009-05-02 Thread Marc PD4U
Even with further empiric data for a century of two, we still "jump to conlusions" [D. Hume 1711 – 1776] Beside that past global coolings or ice ages were probably not dependent for their arisal on one factor solely. In this case: the number of sunspots

[digitalradio] Re:Solar Cycle 23 Sunspot Group Re-emerges

2009-05-01 Thread Marc PD4U
But is the solar minimum the (only necessary and sufficient) explaining factor for a global cooling? As we say in Holland "One swallow doesn't make it summer" meaning: one cannot 'jump to conclusions' based on unsufficient data, and beside that the swallow is not the explaining factor for su