472 khz wspr software

To coordinate most vks are using 600m yahoo group for email. At the snbcg operating site we have the opportunity to out up some large antenna, and for some time we had wanted to try 472 khz using george m1geo wspr transmitter the plan was using the onsite 50m cellphone mast to pull up some wire, and with some work hopefully, enough wire to have a 14 wave on 472 khz. Im finding it interesting to note how variable conditions can be on 472khz wspr. The ultimate 3 can be used as a cw transmitter, if the modulation type is set to tx and a key is connected in parallel to the second switch. This results in software control of the brightness, as achieved by this u3 modification. There is a wiki here on rr connecting radios to soundcards the radioreference wiki. Experimenters on a new amateur radio band 630meter amateur. Results on 472khz have been very encouraging with wspr reports from many stations in western europe as far as finland with an erp of less than 20mw.

The list below shows the claimed distance records on 472 khz, worldwide and continental. On 15 september a fcc document wrc12 implementation report and order was published, announcing the immediate release of the 472 479 khz band and the 5. Because of this the efficiency of the antenna is low. A look into radios that are wspr and jtx friendly by rick w7rnb. Weak signal communication software wsjtx, wsjt, map65, and wspr are opensource programs designed for weaksignal digital communication by amateur radio. Jul 27, 2012 a very simple and inexpensive transverter designed for use with the ft817 operating in split mode tx on 80m transverted down to mf and rx directly on 472 or 500khz. Figure 4 shows my breadboard driver and pa on soak test when driven with the u2 in wspr mode. The plan also suggests operating frequencies for wspr and jt9, as well as for qrss very slowspeed cw. Note that the recommended wspr 15 subband is a 25 hz slice just above the 200hz wspr 2 subband, i. I had never tried 472 khz before, as the combination of local noise and poor antenna has always put me off. Last evening was a good one and i copied a number of new stations.

The radio is connected via usb to the pc running joe taylor wsjtx program. Recently reader de8msh wrote in to let us know about his experiments with receiving wspr with his rtlsdr. The monitor sensors 630m transverter enables any amateur radio station, equipped with a conventional hf transceiver, immediate, all mode, access to the new 472479 khz, 630m band. This page details the conversion and programming of some of the kenwood pmrs available on the second hand market. Experimental version of wspr, including the slow mode wspr 15. The sensitivity depends on the mode, for op2 it is about 23 db at 2. The transmitter is available as a component kit which includes all the electrical and mechanical components. The program is designed for sending and receiving low. On 472 khz the op8 mode is used, taking 8 minutes 0. Wspr whisper or weak signal propagation reporter software. Experimental version of wspr, including the slow mode wspr15. Wspr implements a protocol designed for probing potential propagation paths with lowpower transmissions.

A video made at the old qth showing my 472khz transverter on wspr. It generates a sequence of outputs in 3 different modes the rf electronics in the transmitter produces 6 watts output but the antenna only radiates 2. It is a protocol, implemented in a computer program, used for weaksignal radio communication between amateur radio operators. It then drives a short wire antenna using a variometer as a part of the matching circuit.

The elad fdmduo seems quite sensitive down to 100 khz the specifications says 10 khz, and coupled with the welbrook this seems to work really well. The 630 m band is only 7 khz wide, so signals shouldnt occupy too much space. The download links refer to a direct download of the recent version of the software per 22082017 this may be updated from time to time. As a result the most popular qso modes are cw and narrow banded weak signal modes such qrss, dfcw, jt9, ft8 and wsq.

On 15 september a fcc document wrc12 implementation report and order was published, announcing the immediate release of the 472479 khz band and the 5. It is not a surprise to see that in the 472 khz band most spots are made during the night. It is amazing the distances achievable on these so called low bands and you will be too if you give it a try. Wspr pronounced whisper stands for weak signal propagation reporter. This wellproduced tutorial from m1geo shows us how to design, build, and use a simple wspr transmitter for the 630 meter band. The main intended application for wspr 15 is for very difficult paths at 7 khz and the new 472 khz band. Pg1ns ham radio site 500 khz projects transmitters. Using the ultimate 2 on 472 khz with an external pa g8agn, july 20 as shown in figure 1, the output from the u2 is taken from pin 7 of the dds module via a relay which is driven by q1 using the transmit line from the atmega168. It will be fascinating at some stage to try and correlate the various indices with improved receptionconditions. Using the ultimate 2 on 472 khz with an external pa g8agn. Wspr, which stands for weak signal propagation reporter, is software designed for transmitting and receiving lowpower transmissions to test propagation paths on mf and hf. Figure 5 gate and drain waveforms for properly adjusted.

The option is discussed in the assembly manual, to jumper that to a0. Jun 26, 2015 if you copy me on 472khz wspr please report it. Normal usage requires a standard ssb transceiver and a personal computer with soundcard, or the equivalent. Teh final amplifier uses an irf510 fet producing 12 watts output. How can i do direct digital synthesis of a 630m wspr signal.

A rather contested feature of opera is the deep search function, based on internet data exchange between several receiving station in order to decode signals. While the arrl is urging the fcc to release rules and regulations for the newly authorized 630 meter amateur radio band 472479 khz, you can use this time to make a simple wspr transmitter for this new ham band. With 5mw maybe less erp i am quite happy with his 2627db sn reports. Over the last week or two, i have been running my 472khz wspr receiver to see what i could catch. This software runs on a raspberry pi which has an rtlsdr dongle and antenna attached and the dump1090 software running. The 472 grabber is very simply, a wide band receiver covering the 630meter band from 470 khz 480 khz and is comprised of a softrock ensemble lf sdr receiver, soundblaster 96 khz outboard sound interface, a low noise vertical with high gain preamp for impedance matching, pc with a lot of head room and spectrum lab software by dl4yhf. Calculations show that the radiated power is about 200 milliwatt. The complete high performance 472 to 479khz 630m band transverter kit makes it very easy to get onto the 630m band especially with weak signal digital modes, but being linear it will work with all modes including ssb if it is allowed in your country. In addition a 500 khz list contacts near 500 khz prior to 20120217 and top 10 lists are also available click on the worldwide or continental links.

At the snbcg operating site we have the opportunity to out up some large antenna, and for some time we had wanted to try 472 khz using george m1geo wspr transmitter the plan was using the onsite 50m cellphone mast to pull up some wire, and with some work hopefully, enough wire to have a. Nov 12, 2018 this slice of the spectrum is below the am radio band at 472 khz. Since monitoring wspr stations is receive only, you dont need a ham license. You may have heard some bits and pieces about operating here over the past year, or two. This software runs on a raspberry pi which has an rtlsdr dongle and antenna attached and the. Youll need a stable receiver capable of tuning ssb signals in the 472 khz range and the ability to connect it up to the sound card of your computer. Soundmodem is a multiplatform soundcard packet radio modem written by thomas sailer, hb9jnxae4wa. The si5351a synthesiser module kit can be used with the u3s kit to get 0hz drift reports on 10m wspr, even without the ocxo, by using a heatsink on the crystal. But keep in mind that some software packages are still in constant evolution and more recent versions might be available. If you found content on this site useful and would like to see more, please consider making a donation. Using the ultimate 2 on 472 khz with an external pa g8agn, july 20 as shown in figure 1, the output from the u2 is taken from pin 7 of the dds module via a.

As you can see most spots are made in the hour of 23 utc and 00 utc. So it nice to have a new playground to run around that has new, shiny and different toys to play with. The main intended application for wspr15 is for very difficult paths at 7 khz and the new 472 khz band. This transverter will help get you started on the new 630 meter ham band. A very simple and inexpensive transverter designed for use with the ft817 operating in split mode tx on 80m transverted down to mf and rx directly on 472 or 500khz.

With the 25w to 50 w output you may have some nice cw qso on the low bands, even with relatively modest antennas. Wspr is an acronym for weak signal propagation reporter and is a software program and rf protocol designed for very weak signal radio communications between ham radio users. Some of you may be interested in trying wsprx, a new version of wspr. Besides amateur activity on 472 khz and 7 khz theres many interesting signals at vlf frequencies. Dec 06, 2015 while the arrl is urging the fcc to release rules and regulations for the newly authorized 630 meter amateur radio band 472 479 khz, you can use this time to make a simple wspr transmitter for this new ham band. Icom ic735 as a receiver for wspr on 630 meters by rick, w7rnb wi2xjq. Having played around with the wellbrook loop on 7 mhz the other evening i decided to try some 472 khz reception on wspr. For installable enduser packages please go to the wsjt web site at the link below. Albert ea3iw made wspr spots on 475 khz over a distance up to 1900 km. At the snbcg operating site we have the opportunity to out up some large antenna, and for some time we had wanted to try 472 khz using.

It may be interesting to try on 160 meters, as well. Regarding the modes, distinction is made between phone, cw, qrss including dfcw and digi. Although joe taylor launched wspr, it is now open source and is managed by a small team of radio amateurs. Construction takes around 6 hours to fully built and test. As you may remember, this is all very simple the unmodified ft847 connected up to an untuned butternut vertical. Software is now open source and is developed by a small team. Specifically id like to use an atmega 328 chip running at 20 mhz to produce such a signal.

Anyone can access the wsprnet website and access data online andor download and process this with an excel spreadsheet created by mark hughes, gm4ism, with enhancements by dr. On 472khz, i like wspr as there are usually many people using this mode most nights. Although any value in this range could be coded, the wspr software only accepts. My antenna is still the earthelectrodes in the ground, but even with a measured 5mw erp i have been copied in many countries with the best dx being norway.

The monitor sensors 630m transverter enables any amateur radio station, equipped with a conventional hf transceiver, immediate, all mode, access to the new 472 479 khz, 630m band. Note that the recommended wspr15 subband is a 25 hz slice just above the 200hz wspr2 subband, i. The wsjtx program allows you to send the call signs of stations you. Band activity has been very high, and there are often more wspr stations more than 110 stations on 472 khz than on 80 or 160 meters. Whisper wspr and other weak signal softwares gateway. Having played around with the wellbrook loop on 7 mhz the other evening i decided to try some 472 khz reception on w spr. This slice of the spectrum is below the am radio band at 472 khz.

Those desiring to operate continuously transmitting cw propagation beacons or to use wideband modes are encouraged to obtain experimental licenses and to operate either below 472 khz or above 479 khz, raab said in his quarterly report. Initially, all of my 472 khz wspr gear was on this page, but as the individual topics grew, it made sense to have them on their own seperate pages. The protocol was designed, and a program written initially, by joe taylor, k1jt. The program can decode signals with sn as low as 28 db in a 2500 hz bandwidth. Most amateurs get by with smallish antennas but when 472 khz has a wavelength of 630m, everyone has small antennas. I want to do direct digital synthesis of a 630m band wspr signal. A quick means of evaluating your receive capabilities using wspr. Sorry this page is still being written, and may appear a bit confusing. Wspr is a software application which was created by joe taylor, k1jt, a nobel prizewinning princeton physicist who also developed another digital mode for amateur radio called wsjt. These 61 possibilities could be fitted in 6 bits 26 64, but 7 bits are used. Oh1lsq 1736km has copied my 472khz wspr signal with the transverter. You may watch the wspr results in real time at wsprnet.

This was also my first attempt using the wspr mode of the wsjtx program. John langridge kb5njd recently visited the south canadian amateur radio societys scars monthly club meeting and set the record straight on 630 m. I will use standard phase accumulator algorithm which i believe i can get to run in less than 12 cycles. Aug 19, 2016 a look into radios that are wspr and jtx friendly by rick w7rnb.

Wspr software using an alias s wltb1 instead of a callsign v a3abc. Dec 06, 2016 630m, wspr, pro1b and the townhousei was absolutely delighted last night to make my first reception of signals on the 630m band 472 khz. In the last 3 dx seasons on 500khz oh1lsq managed to copy me when i was using different rigs and antennas. I just switched to mf and received 2 spots by g8huh in io81mg 250km in daylight. Normal transmissions carry a stations callsign, maidenhead grid locator, and transmitter power in dbm. Many ham transceivers and most general coverage receivers can receive below 500 khz. Home wsjtx wsjt map65 wspr simjt program development references support. Probe potential propagation paths using lowpower transmissions. There are two versions of the kenwood programming software kpg20d and kpg67d on this page. The spots were made from 26th of december 2017 till the 6th of january 2018. Nov 27, 2019 since monitoring wspr stations is receive only, you dont need a ham license. It uses an arduino with an si5351 chip to produce wspr beacon signals.