giovedì 30 marzo 2023

Cold Beer Radio

Ricevuto la trasmissione di Cold Beer Radio Stazione free dai Paesi Bassi.

Il giorno 26 marzo 2023 alle 18.47 UTC, a 6295 kHz in modo AM, ho ascoltato il programma musicale pop/folk di Cold Beer Radio, qualità del segnale discreto.

Per l'ascolto ho utilizzato il ricevitore ELAD FDM-S1, mentre l'antenna è una T2FD da 14,5 m installata inverted vee (autocostruita)

Rapporto di ascolto inviato via email a: coldbeerradio@hotmail.com

conferma tramite messaggio email con allegato eQSL, in 4 gg.

" Hello Claudio,

Thank you for your reception Report and for Listening Cold Beer Radio in Italy.
Greetings from The Netherlands
Cold Beer Radio "
 

Radio station CHU 3330 kHz

Il 10 marzo 2023 dalle 00.02.00 to 00.04.14 UTC sulla frequenza 3330 kHz in modalità USB, SINPO 3 2 3 4 2.

Ho ricevuto dal sito trasmittente di Ottawa, ON – Canada, la stazione “3,33 MHz NRC shortwave station broadcasts (CHU)”, il segnale era sufficiente, presente interferenza da segnale digitale adiacente e rumore di fondo.

La stazione radio CHU Ottawa è a circa 6268 km dal mio QTH

Per l'ascolto ho utilizzato il ricevitore SDRplay RSPdx abbinato ad un personal computer con CPU Intel Core i7-4771 3.5 Ghz e software SDRuno, mentre l'antenna
è una Terminate Folded Dipole (T2FD) da 14,5 m installata inverted vee (autocostruita).

Rapporto d'ascolto inviato all'indirizzo email: radio.chu@nrc-cnrc.gc.ca, conferma con lettera contenente QSL dopo 20 gg




 

Ruqui Radio AM

Ricevuto la replica della seconda trasmissione di Ruqui Radio AM Stazione free dalla Spagna.

Il giorno 26 marzo 2023 alle 11.00 UTC, a 9670 kHz in modo AM, via Channel 292 da Rohrbach Waal (Germany) ho ascoltato il programma musicale di Ruqui Radio AM , qualità del segnale ottimo.

Per l'ascolto ho utilizzato il ricevitore ELAD FDM-S1, mentre l'antenna è una T2FD da 14,5 m installata inverted vee (autocostruita)

Rapporto di ascolto inviato via email a: ruquiradioam@hotmail.com

conferma tramite messaggio email con allegato eQSL, in 3 gg.

" Hola Claudio,

Agradezco mucho tu informe de recepción, te adjunto e-QSL verificando la escucha de RuquiRadioAM.

He mirado fotos del sitio de Italia donde resides y es precioso, me gustaría mucho un día poder ir de viaje a Italia, también he consultado tu blog y me ha gustado mucho lo he puesto en favoritos lo mirare mas detenidamente,

Reciba un cordial saludo / Yours sincerely,

Jordan Alcolea Perez

RuquiRadioAM

Mis sitios de contacto / My contact sites:

Twitter: @ruqui05

Pagina Web / Website: https://ruquidx.com/ "

AUDIO MP3

domenica 19 marzo 2023

CBV Valparaiso Playa Ancha Radio, Chile

Ricezione stazione utility CBV

Ricevuto stazione radio facsimile CBV a 17146.4 kHz - 1kW,  Centro de Telecomunicaciones Maritimas de Valparaiso - Chile, distante dal mio QTH circa 11882 km

Carta meteorologica "CARTA DE SUPERFICIE" FECHA-MAR-23 HORA 18 UTC" ricevuta in modalità F3C (FAX) il giorno 14 marzo 2023 alle 22.19 UTC, 

Setup di ascolto: ricevitore SDRplay RSPdx abbinato ad un personal computer con CPU Intel Core i7-4771 3.5 Ghz e software SDRuno, mentre l'antenna è una Terminate Folded Dipole (T2FD) da 14.5 m installata a V invertita (homemade).

Le immagini radiofax sono state decodificate con il software FAX Fldigi ver.4.1.22

 Rapporto di ascolto inviato tramite messaggio email a: cbvradio@directemar.cl

 Conferma tramite messaggio email con lettera di conferma, eQSL e foto stazione allegate in 3 gg.


 Sequenza immagini radiofax ricevute

CARTA DE SUPERFICIE" FECHA-MAR-23 HORA 18 UTC

VIENTO (kn)

PRESION (hPa)

IMAGEN DE SATÉLITE




martedì 14 marzo 2023

Radio Station WWV 20 MHz

 20 MHz WWV Broadcast

NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD time code, and geophysical alerts.

Broadcast Frequencies

WWV operates in the high frequency (HF) portion of the radio spectrum. The station radiates 10 000 W on 5 MHz, 10 MHz, and 15 MHz; and 2500 W on 2.5 MHz and 20 MHz. Each frequency is broadcast from a separate transmitter. Although each frequency carries the same information, multiple frequencies are used because the quality of HF reception depends on many factors such as location, time of year, time of day, the frequency being used, and atmospheric and ionospheric propagation conditions. The variety of frequencies makes it likely that at least one frequency will be usable at all times.

Antennas

The WWV antennas are half-wave vertical antennas that radiate omnidirectional patterns. There are antennas at the station site for each frequency. Each antenna is connected to a single transmitter using a rigid coaxial line, and the site is designed so that no two coaxial lines cross. Each antenna is mounted on a tower that is approximately one half-wavelength tall. The tallest tower, for 2.5 MHz, is about 60 m tall. The shortest tower, for 20 MHz, is about 7.5 m tall. The top half of each antenna is a quarter-wavelength radiating element. The bottom half of each antenna consists of nine quarter-wavelength wires that connect to the center of the tower and slope downwards to the ground at a 45 degree angle. This sloping skirt functions as the lower half of the radiating system and also guys the antenna.

WWV Antenna Coordinates

Frequency (MHz)

Latitude

Longitude

2.5

40° 40' 55.2" N

105° 02' 31.3" W

5

40° 40' 42.1" N

105° 02' 24.9" W

10

40° 40' 47.8" N

105° 02' 25.1" W

15

40° 40' 45.0" N

105° 02' 24.5" W

20

40° 40' 53.1" N

105° 02' 28.5" W

https://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwv

Il 21 febbraio 2023 dalle 17.28 alle 17.35 UTC sulla frequenza 20000 kHz in modalità AM, SINPO 3 4 3 4 3.

 Ho ricevuto dal sito trasmittente di Fort Collins, CO – U.S.A., “20 MHz WWV Broadcast”, il segnale era sufficiente, anche se c'era molto rumore di fondo.

 La stazione radio WWV Fort Collins è a circa 8387 km dal mio QTH

Setup di ascolto: ricevitore SDRplay RSPdx, software SDRuno, antenna End Feed 12,1 m (self-built)

Rapporto d'ascolto inviato all'indirizzo email: wwv@nist.gov, conferma con lettera contenente QSL dopo 21 gg.

 AUDIO MP3



 

venerdì 10 marzo 2023

JFX Kagoshima Fishery Radio Station

Ricezione stazione utility JFX

Ricevuto stazione radio facsimile JFX a 8658 kHz - 1kW,  Stazione di trasmissione radio per la pesca della prefettura di Kagoshima, distante dal mio QTH circa 9615 km

Carta meteorologica JFX NOOA“ ricevuta in modalità F3C (FAX) il giorno 7 marzo 2023 alle 18.00 UTC, 

Setup di ascolto: ricevitore SDRplay RSPdx + SDRuno, abbinato ad un PC Intel Core i7-4771 3.5 Ghz e software SeaTTY FAX, mentre l'antenna, è una Terminate Folded Dipole (T2FD)da 14,5 m installata inverted vee

Rapporto di ascolto inviato tramite messaggio email a: jfx@chime.ocn.ne.jp

 Conferma tramite messaggio email con eQSL allegata in 3 gg.

 



martedì 7 marzo 2023

NRC shortwave station broadcasts (CHU)

 Radio Station CHU

Time accuracy superior to telephone time accuracy is available throughout Canada and in many other parts of the world by means of the NRC's radio time signals broadcast continuously from shortwave radio station CHU. If corrections are made for the propagation delay from CHU to the user, and for delays in the user's receiver, an accuracy of better than 1 ms can be obtained. Signal availability at a user's location depends on ionospheric conditions. CHU also broadcasts a time code which can be decoded with common computers and modems.

Three frequencies are used: 3330, 7850, and 14 670 kHz. The transmission mode, upper single sideband with carrier re-inserted, provides time signal service without requiring a special SSB radio, and also provides three standard frequencies. The frequencies are derived from one of a trio of atomic clocks located at the transmitter site. Three clocks are employed to permit majority logic checking. CHU time signals are also derived from these clocks. The clocks at the CHU transmitter site, about 20 km from the NRC's time laboratory, are compared daily with the NRC's primary cesium clocks.

Normally the time broadcast by CHU is accurate to 10-4 s and any offsets of the carrier frequency from UTC(NRC) are less than 5x10-12. UTC(NRC) is the version of Coordinated Universal Time (UTC) that is realized at the NRC. It is maintained to within 100 ns of UTC and has a frequency offset of less than 1x10-13.

UTC is the international official time reference. It is constructed by the Bureau International des Poids et Mesures (BIPM), based on the average of laboratory and commercial atomic clocks located in laboratories around the world. It is steered in frequency using primary cesium clocks located at some of the major time laboratories.

UTC was defined to coordinate atomic clocks so that they could all agree and still loosely follow the irregularities of the astronomical time scale UT1, which is needed in astronomical observations and in celestial navigation. Since 1972, leap seconds have been used to keep UTC within 0.9 s of UT1.

The difference [UT1- UTC] is called DUT1, and this fraction of a second [-0.8 s to +0.8 s] is broadcast by means of an internationally accepted code. To decode the size of DUT1, in tenths of a second, a user counts the number of emphasized seconds markers in one minute. For CHU, the emphasized seconds pulses are split, so that a double tone is heard. When the emphasis is on seconds 1 through 8, DUT1 is positive; and when DUT1 is negative, seconds 9 through 16 are used.

The first minute of each hour commences with a full 1 s pulse of 1000 Hz tone, followed by 9 s of silence, and then the normal pattern of 0.3 s pulses of 1000 Hz at one-second intervals. The normal pattern for each of the next 59 minutes starts with a 0.5 s 1000 Hz pulse, followed by the DUT1 code employing split 0.3 s pulses where required, and normal 0.3 s pulses up to and including that at 28 seconds. The pulse at 29 seconds is omitted. Following the normal pulse at 30 seconds, for a 9 s period, 1000 Hz pulses of 0.01 s occur, each followed by the CHU FSK digital time code described in CHU broadcast codes. The pulses between 40 and 50 seconds are of normal length. In the final 10 s period of each minute a bilingual station identification and time announcement is made, with the 1000 Hz seconds pulses shortened to "ticks". Each minute's announced time refers to the beginning of the pulse which follows. Since April 1, 1990, the announced time is always UTC.

The CHU station is located 15 km southwest of Ottawa at 45° 17' 47" N, 75° 45' 22" W. Main transmitter powers are 3 kW at 3330 and 14 670 kHz, and 5 kW at 7850 kHz. Individual vertical antennas are used for each frequency. The electronics systems feeding the transmitters are duplicated for reliability, and have both battery and generator protection. The generator can also supply the transmitters. The announcements are made by a talking clock using digitally recorded voices. The digital voice announcements entered into service in 1990. The voice in English is that of Harry Mannis (a former CBC announcer) and the voice in French is that of Simon Durivage (of Radio-Canada).

Historical information

Radio station CHU is operated by the NRC. The call letters CHU were first used for Canadian time transmission in 1938, on the frequencies, 3330 kHz, 7335 (7850 since 2009) kHz and 14670 kHz. The 2009 change in frequency was to avoid new interference permitted since 2007, when the International Telecommunications Union reallocated the 7300-7350 kHz band, changing it from fixed service to general broadcast use. After this change, our 7335 kHz transmissions began to be obscured by numerous broadcasters from around the world who started to use that frequency.

Before 1938 the call letters of essentially the same transmissions were VE9OB. The carrier frequency has been the specified standard since 1934; before that the quartz oscillators had been tuned to standard wavelengths. Continuous transmissions at a wavelength of 20.4 m had started in 1933, joining the 40.8 m and 90 m transmissions, which began in 1929 (daytime only). Daily transmission on a wavelength of 52.5 m had begun in 1928 under the call letters 9CC (later VE9CC), but ceased with the startup of 40.8 m operation. 9CC had started experimental time transmission in 1923 on 275 m, and license 3AF had operated in 1922. Thus there is quite a range of possible dates to assign to the establishment of CHU; we lean towards 1929 as being the start of daily time transmissions at essentially the modern frequencies. Of course there has been quite a change in equipment and accuracy over the years, but the largest improvement was with the change to cesium atomic clocks in 1967. In 1970 the responsibility of operating CHU was transferred from the astronomers at the Dominion Observatory to the physicists at the National Research Council.

Since 1970, the National Research Council has been charged with maintaining official time for Canada. The shortwave radio station CHU is one, but only one of the ways that official time is disseminated across Canada.

Following internationally accepted recommendations, Canada and other countries have official time scales in agreement within 10µs. Since CHU's transmissions are well within 100µs of official Canadian time, for all distant users of CHU, the dominant source of time error comes from the radio wave path reflecting off the ionosphere as the radio signal travels from the transmitter (in Ottawa, Ontario, Canada) to the user. The time delay is 3.3µs per km of path, and generally varies by less than 1ms due to uncertainties in path including the uncertainty in the number of skips made by the radio wave (reflections down from the ionosphere and back up from the surface of the Earth). For a fixed receiver when the number of skips does not change, the variation in the path delay will usually be less than 100µs. A small additional delay comes from the radio receiver, and may be significant.

Before April 1, 1990, CHU's time announcements were given as Eastern Standard Time. Since that time CHU's time announcements have been given as Coordinated Universal Time (UTC). The change from EST to UTC was done to remain in the spirit of the recommendations of the International Consultative Committee on Radio: 'that the standard time broadcasts on standard frequencies be given in UTC'. In a narrow sense, since CHU does not broadcast on the frequencies allocated for frequency standards, these recommendations do not strictly apply to CHU. However, since CHU is received across Canada's six time zones and around the world, we made the change when it became possible technically to change from EST to UTC without difficulty.

The warble tone at seconds 31 to 39 allow any computer with a Bell 103 compatible 300 bps modem to receive and decode an accurate source of time. The details on the CHU broadcast codes can be found here.

nrc.canada.ca/shortwave


Il 24 febbraio 2023 dalle 11.45 alle 11.50 UTC sulla frequenza 14670 kHz in modalità USB, SINPO 4 4 3 4 3.

Ho ricevuto dal sito trasmittente di Ottawa, ON – Canada, la stazione “14,67 MHz NRC shortwave station broadcasts (CHU)”, il segnale era buono, anche se c'era molto rumore di fondo.

La stazione radio CHU Ottawa è a circa 6268 km dal mio QTH

Per l'ascolto ho utilizzato il ricevitore SDRplay RSPdx abbinato ad un personal computer con CPU Intel Core i7-4771 3.5 Ghz e software SDRuno, mentre l'antenna è una Loop 1,1 m con preamplificatore da 20 dB (tutto autocostruito).

Rapporto d'ascolto inviato all'indirizzo email: radio.chu@nrc-cnrc.gc.ca, conferma con lettera contenente QSL dopo 11 gg. 

 


 AUDIO MP3


 

domenica 5 marzo 2023

LRA 36 National Radio Arcangel San Gabriel

Trasmissione dall'Antartide di LRA 36 National Radio Arcangel San Gabriel, in onde corte sabato 4 marzo dalle 21.00 a domenica 5 marzo alle 03.00 UTC su 15476 kHz USB

Setup di ascolto: ricevitore SDRplay RSPdx abbinato ad un computer Intel Core i7-4771 CPU 3.5 Ghz e il software SDRuno, l’antenna è una Terminate Folded Dipole (T2FD) da 14,5 m installata inverted vee (autocostruita)

Rapporto di ascolto con file MP3 e link per video pubblicati sul blog, inviato a: lra36nacional@gmail.com

sito web stazione: https://www.radionacional.com.ar/tag/lra-36-arcangel-san-gabriel/

 











 





 

 

 

 

 

 


Conferma via email con eQSL in 3 gg.