LF
The change from 500KHz to 472KHz rendered a few mini Xtal controlled
TX modules once used on 500 redundant so I have changed them to DDS
control.
I have run the 200uW TX again which gave me my first spot on 500kHz
in 20009 :-
2009-11-22 00:48 G3ZJO 0.503814 -30 0 IO92ng +17 0.050 M0BMU
IO91vr 76 47
Since that first report I have made antenna improvements so assuming
no changes at M0BMU these should be reflected in the report from
that rig.
2013-01-28 00:50 G3ZJO 0.475790 -18 0 IO92ng +0 0.001 M0BMU
IO91vr 76 47
Last night I ran a different mixer/driver to the same PA still
200uW EIRP with very much the same results.
2013-01-30 00:30 G3ZJO 0.475612 -21 0 IO92ng +0 0.001 M0BMU
IO91vr 76 47
Today I completed the change of my very first test TX into a buffer,
this TX could never produce enough signal into my first antenna
experiments for a decode. I measured the power into a 50R load it is
10dB down on the above TX so 20uW EIRP. I tried it as the PA.
2013-01-31 14:46 G3ZJO 0.475601 -30 0 IO92ng +0 0.001 M0BMU
IO91vr 76 47
After 4 transmissions (only 8 minutes on air) my best DX is
100Km.
2013-01-31 14:56 G3ZJO 0.475602 -29 0 IO92ng +0 0.001
G3SZS IO81vv 100 62
If I was calling CQ on the key I estimate 8000 Years
before I got any report AT ALL then it would most likely be
meaningless 599 :-)
Unfortunately the power levels shown by the WSPR reports are
not correct and must be disregarded. Tests will continue at 20 micro
Watts EIRP for this evening.
73 Eddie
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