Message-ID: <1357c3ccc91.marcocadeddu@tin.it>
Date: Tue, 14 Feb 2012 15:20:53 +0100 (CET)
From: "marcocadeddu@tin.it" <marcocadeddu@tin.it>
To:  <rsgb_lf_group@blacksheep.org>
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Subject: R: LF: DK7FC received in South India
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Hello Markus!

Thanks for your nice job! Hope to be ready with my=20
antenna before you come back to DL: at least Stefan help you to avoid=20
to forget EU.... ..
By the way I'm quite worried for you: I saw in the=20
picture of the palm shed the size of the mosquito net! ;-)

73, Marco=20
IK1HSS
----Messaggio originale----
Da: markusvester@aol.com
Data: 14-
feb-2012 11.55 AM
A: <rsgb_lf_group@blacksheep.org>
Cc: "Stefan Sch=C3=A4fer"
<Stefan.Schaefer@iup.uni-heidelberg.de>
Ogg: LF: DK7FC received in=20
South India

We are currently in Kerala (India), and I have taken along=20
an LF receive setup consisting of active E-probe, FiFI-SDR IQ receiver,=20
and my netbook. Due to other activities, limited notebook battery life=20
and lack of internet connectivity, it is not possible to run a=20
continuous grabber from here, but I couldf arrange a few receive=20
sessions, either around local midnight or before sunrise (details given=20
below).=20

At night, HGA 135.43 kHz was up to 58 dB SNR, and both HGA=20
and DCF were clearly audible. HGA could still be detected at about 12=20
dB SNR at midday. So far, signals from DK7FC were positively received=20
on three occasions. I have asked Stefan to temporarily QSY 0.2 Hz down=20
to evade an erratically appearing local line. Besides DK7FC, the=20
attached screenshot from last night may also have a weak trace on=20
136174.3 and perhaps another on 136172.8 Hz  (note that frequency=20
scales are offset by about 0.22 Hz due to residual LO error).

Depending on our travel group's schedules, I may be able to run a=20
couple more evening sessions in the days to come. Unfortunately we have=20
to walk to the next village for internet access, but I can hook up with=20
Stefan by mobile phone for announcements and immediate feedback. We=20
intend to go back to DL on Feb. 24th.

Best 73,

Markus (VU/DF6NM)


Details:

Location: MJ89GP, 9.65 N 76.53 E, in the village of=20
Sreekandamangalam, about 5 km north of Kottayam, Kerala, India, time=20
zone UT + 5:30,
antenna: Eprobe 40 cm wire in a palm-leave shed, simple=20
BF245C preamp,
receiver: FiFi-SDR (modified frontend, temperature=20
stabilized Si570), LO 135 kHz (0.22 Hz low),=20
computer: akoya netbook,=20
internal soundcard 11025 IQ /s, SpecLab FFT 21 mHz, 10s /pix.

Receive=20
sessions:=20

12-02-07 morning  0:09-01:28
noise blanker not enabled
0:20-
0:55: 136172.0+-0.075  DK7FC T...M

12-02-08 morning 0:49-02:00
noise=20
blanker not enabled
local carrier on 136172.1
nil DFCW

12-02-08=20
daytime 6:38-7:06
HGA about 12 dB SNR
QRM lines 136172.1, 136074.0

12-
02-08 evening 16:04-17:32:=20
noise blanker enabled
136171.8 +-0.075=20
DK7FC  "O" up to 20 dB SNR, HGA abt 58 dB SNR

12-02-13 evening 17:39-
19:12:
noise blanker enabled
17:39-19:12  136171.8 +-.075  DK7FC "O" 15-
20 dB SNR
17:45-18:03, 18:58-19:05 136174.3 unid "T" < 10 dB SNR
18:57-
18:59  136172.8 unid "T"