View Full Version : DW Sines on 13810 kHz
Perfect results, but the propagation today was not very good. MUF was a bit low for 1700 km distance to the TX.
Hi,
At the start of my listening time, 12 noon local time, this DW transmission was the only DRM-transmission that I actually could receive. The number of DRM stations has clearly dropped. :mad:
Anyway, this DW transmission from Sines produced an excellent result. Listening for 77 minutes gave a CDA of 99.3 %. Time: 10:10 - 11:27 UTC.
Perfect reception for almost 6 hours with the active antenna and a 70 cm whip on top, coupled to the gate of the FET via a very small capacitor consisting of about 6 cm2 copper foil on the (double-sided) PCB spaced 1.6 mm (I haven't checked the capacitance). Perfect reception. :)
A >4 hour log with the same configuration as my last log. The dips around 12:55 UTC seem to be lightning-related. I noticed one TX break at 13:22 UTC. Otherwise perfect reception.
And again 4 hours of perfect reception.
FritzWue
21-05-2008, 15:03
Good results again:
mitajohn
22-05-2008, 10:43
Hi all,
Although out of the beam the log started with good results until co-channel QRM affected the decoding.
Some minor dropouts around 11:10, but on the whole very good.
maxpower
25-05-2008, 10:56
Just Perfect!
mitajohn
26-05-2008, 15:01
Hi all,
Is this a TX problem?
An hour from today with almost perfect results, but I believe MUF was a bit too low, because the signal was not very strong.
Sometimes a little bit problematic today, especially in the middle of the log.
Excellent reception this afternoon.
Not so stable SNR today, but the decoding was near perfect anyway.
maxpower
07-06-2008, 18:48
A perfect result at my place again with the Paperradio SDR. I like DRM @ 21m. Works really nice. :)
Hi,
DW which about this time of the day is the only DRM station that I actually receive... Listening time: 10:48 - 11:48 UTC. Result: 90% CDA.
mitajohn
15-06-2008, 11:47
Hi all,
This transmission is not intended for my area but sometimes it has a good footprint for a while.
This log was taken with my Roadstar TR-2350P indoor with the telescopic antenna, my simplest and newest 12 kHz IF converter connected to an ACER Laptop with Windoze Vista (ugh).
Hi,
Despite that 14 MHz, according to IPS, is the optimum frequency for transmission between Portugal and Stockholm I only achieved 73 % CDA today. Time: 13:31 until close down at 13:59 UTC.
Some kind of co-channel QRM made the reception unstable around 13:30 UTC.
A log with Dream 1.6.1cvs from the beginning and then Dream 1.7.9cvs for the last half of the log. Just for my interest in the "Blinking LED syndrome", only seen with 1.6.1cvs (only here on 13810 this morning; 6.130 and 7.310 MHz were OK) :confused:
Seems like I should have made my comparison between the two Dream softwares today rather than yesterday. Good reception but an unsteady SNR.
The unsteady SNR from yesterday was present today also, but only after I had switched the FRG-7700 to (very) slow AGC. Looks like I have to optimize this a bit.
Today's log is a comparison between a) the Yaesu FRG-7700 with the active antenna (a modded PA0RDT) connected to my office PC running Dream and b) Roadstar TRA-2350P with its telescopic antenna and a modded 9 V DC power supply, a ground wire from the Ant GND terminal to the pipe of the central heating, Dream running on a Lap-Top with Windoze Vista (arrgh) and with the regular 230 VAC power supply connected to the laptop.
Both logs are almost perfect; it is interesting to note that the Roadstar decodes even better than the FRG-7700. The SNR is about the same for the two receivers until I switched the FRG-7700 to very slow AGC.
FritzWue
05-07-2008, 15:01
A lot of fading during the last 30 minutes:
A more or less unattended log after having done some tests with my receiver.
An almost perfect log with the Roadstar for 4 hours and 50 minutes.
Another pretty good result with the Roadstar.
Portable in Stockholm. Almost perfect as long as there is no external power supply connected to the laptop.
Hi all,
77 minutes of listening; 12:42 until close down at 13:59. For almost 30 minutes, the reception was "shaky", so a total of 75 % for the CDA was the result. Thunderstorms in the vicinity?
FritzWue
26-07-2008, 14:02
Very good result, but not so stable after 12:00 UTC.
FritzWue
03-08-2008, 15:17
Very good again with on frequency AM interference during the last hour:
Something wrong somewhere. I noticed that the TX carrier disappeared at least 5 times during my logging.
Very large fluctuations in the SNR, but almost perfect anyway.
I am still wondering about the unstable conditions from Sines. However, the decoding is almost perfect.
3 h 45 minutes of 100% correct decoding if you don't count the break between the Mode changes.
Good ol' Sines. 100% CDA. Perfect.
Some fade-outs in the first 90 minutes, after that it was perfect. The conditions are not that good in the mornings. Max. SNR was at 1109 UTC.
Almost 4 hours perfect reception. The three dips before 9 UTC were local PC interruptions, the 4th is the mode change.
Apart from the TX break just before 9 UT the reception was perfect.
Hi all,
Results for 3 hours recording.
jos.
Perfect here in the early afternoon.
Perfect reception today too. An unattended log.
Hi all
Today we are making some tests with 3 configurations.
QRG ---- 13810 KHz
Time ---- UTC
1º- from 8:00 to 8:10 one transmitter with antenna beamed to 30º
2º- from 8:10 t0 8:50 two transmitters in same QRG and one antenna beamed 30º and the other 40º
3º- from 9:10 to 9:57, two transmitters in the same QRG, but the second transmitter was changed to other antenna, but stay on 40º.
Can you notice any change in signal noise rate or field strenght? Maybe an increase of 3dBs due the 2X90 Kw transmission. But this value is nothing in short wave.
Here in the local monitoring, I noticed a very slow deep, that was moving along the 10 Khz shape on the spectrum analyser. This deep was a amplitude of minus 9 dBs, and was continuos moving on the spectrum (like a scanner). The RX monitor, show a variation of about 5dBs SNR (between 31dB to 35,7 dB) during the "travel" of the deep. In the SNR record, this apear like a very low frequency sinus wave.
I think this deep is the result of the beat from the very litlle phase diference in the frequency of the TXs, or a delay in the modulation path. Note that the transmitters are runing with diferent STRATUS.
Maybe tomarrow, we will be on air with new tests.
73 from CT4RK
Please run these tests again tomorrow.
.... but here is a log from this afternoon...
That would have been 100% CDA if you disregard the Mode change. I can't judge whether there were any tests going on today. The log is 5 1/2 hours long.
Not good results from 2 TX on the air!...The SNR is more stable with only one TX, and the signal strenght is the same. The 3 dBs increasing, is nulled by the QSB. Test canceled for now.
73 CT4RK
A good log from this morning. Perhaps the Impulse Response looked narrower than yesterday's?
Hi Carlos,
pretty good results the past two days, maybe I missed the tests?
Just for the interest, during your tests did you use a delay between the two signals you were transmitting?
Simone
Except for a CPU overload, the reception was perfect.
I am being pestered by some QRM, that probably comes from my neighbour. The severe dips in the log may come from me moving the antenna around in the garden in order to find a spot that is less prone to QRM. The break around 13 UT I cannot explain as I was out mowing the "lawn" in front of my house.
FritzWue
12-10-2008, 12:04
Monitored the signal today.
There were several TX resets, and the signal was very terrible and wide for some time!
Later it was OK again at about 36dB SNR.
FritzWue
12-10-2008, 15:20
The signal is very good, when all is OK.
Obviously some trouble today, SNR was a little lower after 11:44 UTC.
Audio up to 11 kHz, good idea to run reduced amplitude at high frequencies,
but the violins still sound very glassy, probably no better choice possible at that bitrate.
A short log. Perfect for 40 minutes.
More than two hours with perfect decoding. Plus one more log, 100% CDA.
Strong and stable reception.
Hi,
Well, as Terje stated; strong and stable signal, also here in Stockholm.
Time: 11:07 - 11:51 UTC. Result: 99.2 % CDA.
An unattended log while I was out. Only one dropout, but at a different time from Per's.
One drop-out due to a TX Break (?) around 0946 UTC and a Mode change.
Perfect except for a TX break (?) around 1259 UTC.
Good except for one TX break and possibly one or two TX problems near the end.
Hi all.
Good propagtion today,for test of my new If amplifier for R390 !!!!
Log 45min.
Kchibo KK-DRM 01 is not the best receiver for DRM ( :D ) , but it has a 12 kHz IF output. (The biggest part on the 12 kHz sub-PCB is a HC-6/U crystal). The 12 kHz output level is only about 10 mV p-p when I feed +40 dBuV into the modified EAR Jack.
So here is the result for DW on 13810 kHz!
The National RF-B60 is much better and it works perfect with an external antenna too. Perfect reception.
Hi all.
60min. log for test of my Special IF for R390 RX.
Signal from Sines have big fading today also .Fadig 30db up and down .
But max S9+40db=74dbuV.
09:40 local QRM in my PC !!!!
Pretty good results this morning.
Simone
Perfect signal today but very fast fading from S9+10to S9+40db. But no problem for drop out.
Average is S9+20db Log 106min. :) :) :)
10:25 short QRM ?????
mitajohn
08-11-2008, 12:04
Hi all,
Bad results both SWs.
Hi all.
Log from last 46min on this freq. Super signal . :) :)
Hi all
For now, the QRG of 15725 KHz 12:00 to 13:59 are changed by 13810 KHz.
So the 13810 QRG will be on air from 8:03 to 13:59 with a half minute drop at 9:00 and 12:00 UTC for transmitter change propose.
best 73 from CT4RK
Carlos Mourato
Sines
Portugal
mitajohn
14-11-2008, 12:15
Hi all,
Periods of bad and good results in this 90 mins log.
Hi Carlos and all.
Good propagtion today from Sines. QSB S9/ S9+30db .:) :)
74 Min. log .
Hi all.
115min test log from my ICOM IC-R70 . Perfect propagtion. :)
IC R70 take only 80Watts from power line , R390 will have 300 watts for same works !!!!!!!!!!!!!:eek:
Hi all.
77 Min. log perfect propagtion today. :)
Sigbal from ICOM IC R-70 RX.
FritzWue
23-11-2008, 14:15
Good signal:
I kept looking for Sines in Japan, but unfortunately, there was not even a single bit of signal to log. Totally different here in Europe though... :cool:
A long Tx break yesterday, otherwise great results.
Simone
Fine signal. The signal strength was less than usual. I was not in at 12 UTC; don't know what the break was. TX change? (Yes, saw the note a bit up on this page.)
Perfect.
Mode A and QAM64 would be great ...
Just short of 4 hours here with the vintage National RF-B60 connected to my 70 cm Active Whip Antenna outside. 100% CDA. :)
By the way, for the first time I enjoyed Beethoven on the Morphy Richards in the livingroom with the built-in telescopic antenna running on 230 VAC with the AC power supply which came with the receiver!
If you take a hammer and chisel, break the cover of the AC supply apart, solder 4 pcs of 10 nF capacitors across the rectifier diodes, then it works! :p
The signal dropped suddenly just after I started logging, but it picked up again after about 25 minutes. The rest, just short of three hours, was perfect.
The propagation was a bit so-so today too. I noticed two TX breaks during the logging.
A long, unattended log. Some weaker periods around 1100.
A perfect log for a little more than two hours.
A shorter log this afternoon with perfect results.
Good results after a weak start.
Simone
Almost three hours up until the end. 99.8% CDA.
Good results (problem at 08:21 as on 9610 kHz).
Simone
Hiall.
Propagtion back her again short loh 30min for test of my RX.
FritzWue
07-05-2009, 17:00
Wuppertal-A1-A44-A445-Wickede
Hi all.
Good propagation on this band but not so strong signal srtingth.
Good results all day.
Simone
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