Reflections about a remote mediumwave listeners station

A small but fine opening to Peru I could observe on 11.5.2019 between 0315 and 0400 UTC. Although the signal strength was consistently weak, there were 5 new stations for me.

08E40/50N35 [SDRCONSOLE3, 50-m longwire 210°, RPA-2]

1250 0329 PRU Radio Cora, Lima (lim) ID Radio Cora 10742 km
1380 0330 PRU Radio Nuevo Tiempo, Lima (lim) ID Radio Nuevo Tiempo 10695 km
1500 0331 PRU Radio Santa Rosa, Lima/San Miguel (lim) ID 10745 km
1160 0332 PRU OAX4C Onda Cero, Lima (lim) ID Onda Cero 10757 km
1380 0332 PRU OAX2W Radio Campesina, Cajamarca (caj) ID Campesina 10424 km
1470 0334 PRU OAU6E Radio Victoria, Arequipa (are) ID Radio Victoria 10739 km
1470 0334 PRU Vaughan Radio, Lima/Pantanos de Villa (lim) ID Vaughan Radio - directly followed by a Victoria in the back - Vaugh. -60 dBm, Victoria -70 dBm 10752 km
1500 0336 PRU Radio Santa Rosa, Lima/San Miguel (lim) ID 10745 km
1360 0339 PRU Radio Bienestar, Lima (lim) ID 1360 Radio Bienestar 10742 km
1370 0339 PRU Radio Andina Juliaca, Juliaca (pun) ID Juliaca 10587 km
1570 0400 PRU Bethel Radio, Lima (lim) sev. IDs 10732 km

This section displays the status of my logged USA & Canada states. It will be updated.






List of abbreviations for states

Pin board at Google Maps

Status 31 March 2019

Heard states/green (USA): 29
Confirmed states/red: 0
Latest heard or confirmed: 1700 WEUP, Huntsville, Alabama

Heard states/green (Canada): 5
Confirmed states/red: 1
Latest heard or confirmed:

Map source: Free Software Foundation. The source has been changed.

Excellent propagation conditions on the lower bands brought strong signals in the X-band and below in recent days. In the time around sunrise, around 5 o'clock UTC, it was really fun for a long time to hear Radio Monumental from Quito Ecuador at 1510 kc. But also WPTX from Lexington Park, Maryland at 1690 kc and WGIT Faro de Santidad, Canobas, Puerto Rico at 1660 kc were very well received for some time. Outstanding was also the reception of ZYO701 Radio Roraima from Caracaraí, Brazil at 1390 kc. All logs were made with the K9AY switched to NW.

2019-03-28

700 0410 USA WLW, Cincinnati/Tower Drive (U) (OH) ID 6932 km
800 0452 BES PJB Shine 800 AM (Trans World Radio), Kralendijk (bnr) Transmundial ID 8052 km
1190 0500 CLM Radio Cordillera, Bogotá D. C. (bdc) ID 9105 km
1280 0500 CLM Caracol Radio, Pasto (nar) R Santa Fe ID 9624 km
1620 0500 CUB Radio Rebelde, Guanabacoa/CTOM2 (ch) 8111 km
1660 0500 PTR WGIT, Canóvanas (PR) ID 7360 km
1690 0500 USA WPTX, Lexington Park (MD) ID 6523 km
1510 0505 EQA HCBD1 Radio Monumental, Quito (pic) sev. Ids, big sig! 9820 km
1570 0511 PRU Bethel Radio, Lima (lim) Halleluja ... not so good 10732 km

2019-03-27

730 0452 CAN CKAC, Montréal/Pointe-Calumet (QC) 5843 km
710 0500 USA WOR, New York/Lyndhurst [NJ] (NY) ID 6179 km
1010 0500 CAN CFRB, Clarkson (ON) ID 6331 km
1130 0500 USA WBBR, New York/Carlstadt [NJ] (NY) ID 6175 km
1390 0500 USA WEGP, Presque Isle (ME) 5399 km
710 0501 CUB Radio Rebelde, Camagüey/CTOM1 (cm) 7958 km
1620 0502 CUB Radio Rebelde, Guanabacoa/CTOM2 (ch) 8111 km
760 0505 USA WJR, Detroit (MI) ID 6648 km
1350 0515 CLM Bésame Ibagué, Ibagué (tol) Jingle ID 9204 km
1560 0515 USA WFME, New York/Queens (NY) 6174 km
1290 0519 USA WJNO, West Palm Beach (FL) ID on Newsradio 1290 WJNO 7668 km
1690 0521 USA WPTX, Lexington Park (MD) ID 6523 km
1190 0557 CLM Radio Cordillera, Bogotá D. C. (bdc) ID [SDRCONSOLE3, K9AY N/W AMS/5422 Hz/-72.0 dBm] 9105

2019-03-26

890 0404 USA WLS, Chicago/Tinley Gardens Park (IL) ID 6973 km
700 0500 USA WLW, Cincinnati/Tower Drive (U) (OH) ID [SDRCONSOLE K9AY USB/2996 Hz/-84.0 dBm] 6932 km
730 0500 CAN CKAC, Montréal/Pointe-Calumet (QC) 5843 km
760 0500 USA WJR, Detroit (MI) 6648 km
1010 0500 CAN CFRB, Clarkson (ON) 6331 km
1010 0500 USA WINS, New York/Lyndhurst [NJ] (NY) 6180 km
1180 0500 CUB Radio Rebelde, Chambas/CTOM1 (ca) ID 7938 km
1620 0500 CUB Radio Rebelde, Guantánamo/CTOM3 (gu) 7871 km
670 0501 CUB Radio Rebelde, Camagüey/CTOM3 (cm) ts, ID 7954 km
1690 0504 USA WPTX, Lexington Park (MD) ID 6523 km
1390 0511 DOM , San Cristóbal (cri) tent., heard .. San Cristobal under strong Brazilian STN (unid) 7652 km
1660 0511 PTR WGIT, Canóvanas (PR) 7360 km
710 0515 CUB Radio Rebelde, Chambas/CTOM3 (ca) // 670 7939 km
1390 0516 B ZYO701 Rádio Roraíma, Caracaraí (RR) ID 8440 km
1510 0516 EQA HCBD1 Radio Monumental, Quito (pic) sev. IDs, vy gd sig [SDRCONSOLE3, K9AY N/W USB/2420 Hz/-96.0 dBm] 9820 km
1690 0521 USA WPTX, Lexington Park (MD) 6523 km
1440 0525 CLM Colmundo Radio, Medellín (ant) ID 9065 km
972 1705 KOR HLCA KBS Hanminjok Bangsong 1, Dangjin (ccg) [SDRCONSOLE3/F, K9AY N/E LSB/2049 Hz/-96.0 dBm] 8548 km
594 1709 IND AIR Maitree Channel/All India Radio GOS, Chinsurah/Magra (WB) 7338 km
1467 1730 KGZ TWR PANI/FEBA Radio, Krasnaya Rechka (cuy) 4954 km
918 1733 IND AIR North, Suratgarh (RJ) 5828 km

2019-03-25

760 0400 USA WJR, Detroit (MI) 6648 km
890 0400 USA WLS, Chicago/Tinley Gardens Park (IL) 6973 km
1010 0400 CAN CFRB, Clarkson (ON) 6331 km
1660 0435 PTR WGIT, Canóvanas (PR) 7360 km
1660 0500 ARG Radio Revivir, Isidro Casanova/Gregorio de Laferrere (ba) 11539 km
1520 0528 USA WWKB, Buffalo (NY) 6337 km
1610 0531 CAN CHHA, Toronto (ON) 6304 km
1690 0539 USA WPTX, Lexington Park (MD) 6523 km
1557 1701 TWN Radio Taiwan Int., Kouhu (YL) [SDRCONSOLE3/F, 50m LW 30° RPA-2 LSB/2049 Hz/-78.0 dBm] 9400 km
918 1707 IND AIR North, Suratgarh (RJ) 5828 km
846 1708 IND AIR West, Ahmedabad A (GJ) 6242 km
594 1712 IND AIR Maitree Channel/All India Radio GOS, Chinsurah/Magra (WB) 7338 km
1377 1728 CHN CNR 1, Xingyang/SARFT554 (HE) 8009 km
972 1732 KOR HLCA KBS Hanminjok Bangsong 1, Dangjin (ccg) 8548 km

2019-03-24

760 0400 USA WJR, Detroit (MI) 6648 km
590 0406 CAN VOCM, Saint John's (NL) 4360 km
1690 0413 USA WPTX, Lexington Park (MD) 6523 km
1660 0414 PTR WGIT, Canóvanas (PR) 7360 km
1440 0419 CLM Colmundo Radio, Medellín (ant) 9065 km
1580 0459 CAN CKDO, Oshawa (ON) 6252 km
700 0500 USA WLW, Cincinnati/Tower Drive (U) (OH) 6932 km
730 0500 CAN CKAC, Montréal/Pointe-Calumet (QC) 5843 km
1010 0500 USA WINS, New York/Lyndhurst [NJ] (NY) 6180 km
1010 0500 CAN CFRB, Clarkson (ON) 6331 km
1130 0500 USA WBBR, New York/Carlstadt [NJ] (NY) 6175 km
1400 0500 CAN CBG, Gander (NL) 4410 km
1440 0500 USA WRED, Westbrook (ME) 5741 km
1500 0500 USA WFED, Washington (DC) 6498 km
1540 0500 CAN CHIN, Toronto Island (ON) 6308 km
1560 0500 USA WFME, New York/Queens (NY) [SDRCONSOLE3, K9AY N/W LSB/2800 Hz/-72.0 dBm] 6174 km
1610 0500 CAN CHHA, Toronto (ON) 6304 km
1660 0500 ARG Radio Revivir, Isidro Casanova/Gregorio de Laferrere (ba) 11539 km
1660 0500 USA WWRU, Jersey City/Carlstadt (N) (NJ) 6176 km
1520 0503 USA WWKB, Buffalo (NY) 6337 km
1190 0519 CLM Radio Cordillera, Bogotá D. C. (bdc) 9105 km
1300 0522 CLM Radio Reloj, Pereira (ris) ID Radio Reloj en Colombia 9198 km

Next Unit of Computing → NUC:

Power consumption is ~15 W, 1,25 Ah at 12 V without Monitor. Running SDR-Console in recording mode with ELAD's FDM-S2 is up to ~20 W, 1,66 Ah. In this mode with the connected Monitor and under WIN 8.1 energy saving mode the consumption is ~30 W, 2,5 Ah. This is more than expected but less than the 90 W 4,74 Ah notebook. The BIOS is capable to WOL (Wake on LAN). This is not possible with the notebook. Also recordings can start out of sleep mode under WOSB. In this mode the USB port for the SDR is off and does not waste energy as it was with the notebook in energy saving mode. Waking up the notebook from sleep mode with WOSB was not possible. The device makes a solid impression; the case is made of metal and cleanly processed. The boards are clearly arranged and properly wired. The operating temperature of the fanless system is 42° under load with the SDR Console.

Monitor:

The screen ist only accessable under a running Windows. This means that access to BIOS and other functions are never available. Due to the low power consumption and no alternatives I decided to keep the device. If something goes wrong the NUC will be handled @home. The monitor has a direction sensor and adjusts the image according to its position. The screen comes with a HD resolution of 1920x1080 px and a fine viewing angle of 180°. To keep the length of the USB cable short, he spends his life standing upside down and mounted in a frame on a wooden wall. The controls are also easier to handle in this position. The weight of this device is 800 g. It is one of the thinnest monitor on the market with 8,5 mm.

Both:

RFI on some QRG's on MW, seems to be irregulary and "adjustable".

All in all:

Better audio or less RFI compared to the notebook. Can be fixed with screws on the desk. A very good performance due to less installed software, i7 Kaby Lake prozessor, 8 GB DDR3 RAM, SSD and 64 Bit OS. It is the fastest device I ever had. Manufacturing & delivery time from Taiwan was ~14 days due to 春节 Chinese New Year 2019, the year of the 猪 Pig. First tests showed no delays in automatic recording. All devices are working perfect together.

The cube has fallen: alea iacta est, as it is called in Latin, if after a long time a decision has been made. In more modern times translated: the winner is a 15.6-inch mobile HD TFT LED screen of the Asus MB 169B+ Brand with a power consumption of 5 watts at a weight of just 800 grams. Although the USB-controlled monitor significantly exceeds my price limit, but also put all the other monitors in the selection, due to the low power consumption in the shade. An interesting effect of the weeks-long search was that smaller monitors tend to consume more power, or the size of the monitor is not necessarily crucial for power consumption. Originally I was looking for 11.6 and 13.3 inch monitors. Only the search for larger models brought me into the optimal power range. Furthermore, the German market is hardly well covered with smaller monitors, which is why I initially searched the Chinese market of a large provider. Another reason to buy locally around the corner was that in the case of warranty the effort is low. Although the previously purchased NUC comes from China, but here I trust more on the longevity of commonly used hardware components. And yes, the monitor has a drawback, of course: due to its small depth, it can not be obstructed against the wall. So here again handmade is announced. The egg-laying "Wollmilchsau" has not yet been born.

The next step is the search for a suitable Ethernet to WLAN bridge for the NUC, so that the small one can be switched remotely even when switched off. This should then be the last search, because a keyboard for the Mini already exists.

He is not yet set up, but he should secure the future of the station. A fanless NUC with i7 processor, 8 GB RAM, 256 GB SSD, WiFi and all possible connectivity is on the way. The decisive factor for the investment in new hardware was the fact that it further reduced the power consumption of the solar-controlled system and also enabled real remote DX. The supply voltage is 12 V; a disturbing power supply is no longer necessary. The mini-computer should consume 15W, a halving of the power requirement compared to the 17 inch notebook. A wireless Wi-Fi connection to a server near the site then takes over the remote function. The latter is so conceived, but whether the reality plays along, is first left undecided. WIN 7 will control the plant, and Teamviewer will connect two PCs. First, as usual, everything has to be tested, and that will happen in the home QTH. At the moment the decision for an external monitor has not yet been made. I'm curious to see how many new RF interferences I have to contend with soon.

This section displays the status of my logged USA & Canada states. It will be updated.







List of abbreviations for states

Pin board at Google Maps

Status 17 January 2019

Heard states/green (USA): 27
Confirmed states/red: 0
Latest heard or confirmed: 1000 KOMO, Seattle, Washington

Heard states/green (Canada): 5
Confirmed states/red: 1
Latest heard or confirmed:

Map source: Free Software Foundation. The source has been changed.

You can find all the logs of the year here: logs_2018.pdf

One year is long, and sometimes it's better than the previous one. What does the station look like at the end of 2018?

The question is not easy to answer. I had to fall back on the notebook after the failure of the tablet. In a 220V environment no problem, but in the 12V mode, you are constantly confronted with run-down solar batteries. The solar system could be expanded to 10 times, and even then I would not be safe from failures. Therefore, I will keep the plant in its current status. But the reasons are elsewhere. The 12 / 19V voltage converter causes slight disturbances in the MW range here and there. They were not available in tablet mode, because the power was converted from 12 to 5 V with a length-controlled power supply. That's why I plan to buy a 50 Ah Lion battery in 2019. He should supplement the existing 22 Ah Lion battery. Together with the notebook battery, I would then come to a running time of 5-7 hours. That is still little, but a bit more comfortable with a corresponding operation.

The mediumwave band from 500 to 2000 kHz in the early afternoon. The formerly low-interference remote location is developing into a HF-picket fence. It looks bad, the disturbances can often be excluded by sidebands. If the signals attract, so after dark, you do not get too much of it. Only the SE leg of the K9AY hides the interference very strong. A disturber shuts off punctually at 17z.

Azimuthal Map
Center: 50°35'1"N 8°40'40"E
Courtesy of Tom (NS6T)



QTH: D-35390 Giessen/Germany

All 50 m Antennas are connected through a RPA-2 Preamplifier.
I am working on a 250°/ 70° direction.

On 24.10.2018 at 1624z I managed the reception of 5AN, ABC Adelaide on the frequency 891 kHz. The weak signal could only be identified with the help of the webstream. The 50 kW transmitter from the state of South Australia is my first Pacific broadcast on medium wave.

Actually, everything was not a problem. The components were assembled, the elements assembled, the wire roll positioned in a bicycle trailer, and we went out to the neighboring meadow. There, first the earth piles with the connection components were cut into the dry soil, then the galvanized 300 m cable was towed from point A (NE) to B (SE), the 80 m long coax was laid out to the hut, and the RPA- 2 connected. The first test showed remarkably good signals over the entire medium wave, no additional amplified noise due to the preamplifier, in short: the perfect antenna for receiving from the NE direction. A two-hour recording showed me later, how good 300 m antenna cable can be.

I sat in my garden hut in front of the waterfall screen and listened intently, likening the reception to the now weak K9AY, it was around 1930z when I heard voices unknown from outside. When they did not stop, I left my seat, walked to the shack, and watched a person slam through the blackberry hedge. I would not want to go through that, I said. Police, was the answer. In the light of the flashlight I could see the lettering on the man's jacket. In fact, I said.

Displaced dog owners carrying their Fiffies on the meadow suspect a power cord, the policeman said, while his companion expertly examined the coaxial cable. It's an antenna, I confirmed, and that's guaranteed no electricity in it. Good - the law did not come to the dicuting. Now the identity card was checked, a radio check was made, and then I was allowed to roll up the quickly mounted antenna again. So that the dog owners can perform their Fiffies again the next morning. We'll check that later, they said before I let them out through the official entrance to the garden. No, we do not want to go through that again, they said, and disappeared in the darkness of the night.

Days later, I realized that the preferred direction of arrival from NE was not guaranteed at all, because one earth point was in the wrong position. So it is not even a pity that the experiment did not work out. It was exciting enough, from planning to firing.

40 safe meters remain me, NE 4-5 m pulled over the impenetrable blackberry hedge, soon. After all, it's my garden, and I do not keep dogs.