Message-ID: <A13B8F425CC3409E86C835E5D770FA68@malPC>
From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
Date: Fri, 4 Dec 2015 16:53:22 -0000
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Subject: LF: WSPR OBSERVATIONS 
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My RX on WSPR MF 477.2 consists of 2 separate systems

1. IC =E2=80=93 706 and 1/4 wave inv L full size on 472 Khz up vert 33 =
metres rest horizontal E/W=20

2. TS-50 and 1/4 wave inv L full size on 1800 Khz and not resonated for =
472 Khz

Both systems are totally independent and antennas run at right angles to =
one another.

I do notice selective fading=E2=80=94each antenna produces a different =
signal strength at times by as much as 10dB, other times both indicate =
the same strength.

Antenna space diversity effect.

I set both RX sensitivity Noise inputs to the same level for these tests

I do notice at times although the received signals are showing on the =
waterfall that some do not decode even strong ones at times.=20

My TX Power at present is only 0dB but I am getting reports/decodes from =
M0LMH between =E2=80=9316 and =E2=80=9320 dB but surprised that I am not =
getting reports from others
especially in the UK or France and can only conclude that their RX =
sensitivity and antennas are POOR.

When I get time I will QRO but need to build an intermediate RF amp =
between TCVR and main MF amp

All comments welcome

de MAL/G3KEV

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<HTML><HEAD></HEAD>
<BODY dir=3Dltr>
<DIV dir=3Dltr>
<DIV style=3D"FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: 12pt">
<DIV>My RX on WSPR MF 477.2 consists of 2 separate systems</DIV>
<DIV>&nbsp;</DIV>
<DIV>1. IC =E2=80=93 706 and 1/4 wave inv L full size on 472 Khz up vert =
33 metres rest=20
horizontal E/W </DIV>
<DIV>&nbsp;</DIV>
<DIV>2. TS-50 and 1/4 wave inv L full size on 1800 Khz and not resonated =
for 472=20
Khz</DIV>
<DIV>&nbsp;</DIV>
<DIV>Both systems are totally independent and antennas run at right =
angles to=20
one another.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I do notice selective fading=E2=80=94each antenna produces a =
different signal=20
strength at times by as much as 10dB, other times both indicate the same =

strength.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Antenna space diversity effect.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I set both RX sensitivity Noise inputs to the same level for these=20
tests</DIV>
<DIV>&nbsp;</DIV>
<DIV>I do notice at times although the received signals are showing on =
the=20
waterfall that some do not decode even strong ones at times. </DIV>
<DIV>&nbsp;</DIV>
<DIV>My TX Power at present is only 0dB but I am getting reports/decodes =
from=20
M0LMH between =E2=80=9316 and =E2=80=9320 dB but surprised that I am not =
getting reports from=20
others</DIV>
<DIV>especially in the UK or France and can only conclude that their RX=20
sensitivity and antennas are POOR.</DIV>
<DIV>&nbsp;</DIV>
<DIV>When I get time I will QRO but need to build an intermediate RF amp =
between=20
TCVR and main MF amp</DIV>
<DIV>&nbsp;</DIV>
<DIV>All comments welcome</DIV>
<DIV>&nbsp;</DIV>
<DIV>de MAL/G3KEV</DIV>
<DIV>&nbsp;</DIV></DIV></DIV></BODY></HTML>

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