Work the world with jt65 and jt9 software

Ham radio operators have already used these modes to earn awards such as arrlas dx century club with nothing more than 5 watts rf output and indoor antennas. Unlike wsjt which if set to wide decode only decodes the strongest message, w4cqzs jt65hf software will decode all messages in the 2000 hz receive bandwidth window which is shown on the waterfall. Wsjtx will do both jt65 and jt9 but jt65hf will only do jt65. Received ft8, jt65 and jt9 signal reports are actually referenced to a. Work the world with jt65 and jt9 explore a new world of. Basically, jt65 is intended to do eme messages, sending a message to bounce off of the moon.

Arrls work the world with jt65 and jt9 dx engineering. As with jt65, it was created by k1jt as development of jt65 for use on the lfmf and hf bands. Using wsjtx software to operate jt65 and jt9 modes. To set the program to use only the jt9 mode, you can set the software to work only jt9 and adjust the transceiver frequency up by 2 khz to shift the passband to the jt9 frequency.

Ebook download pdf work the world with jt65 and jt9. It uses the same logical encoding as jt65, but modulates to a 9fsk signal. These narrowband digital mode signals may not be audible on a regular radio receiver. A good set of basics for the new digital modes and the software that supports. Free jt9 software download jt9 software for windows. You dont need high power or large antennas with jt65 or jt9. Jt65 digital mode software category is a curation of 9 web resources on, wsjtx, jt65 hfcomfort, jt65 hf by w6cqz. The jt9 mode are in many ways similar to jt65 as the share the same basic concept. By only ever transmitting exactly one out of a set of fewer tones, it would appear intuitively that jt9 would be better suited to the variable signal strength commonly found in ionospheric propagation.

X slow modes wspr, jt9, jt4, ft8, qra64a, and jt65. When using the jt65 hf software, youll need to adjust your thinking about the waterfall display. I had heard of jt65 but didnt know anything about it and i had never even heard of jt9. Work the world with jt65 and jt9 and millions of other books are available for. Jt9, intended for mf and hf use, was introduced in an experimental version of wsjt, known as wsjtx. Jt65hf is an adaptation of the jt65a protocol with an emphasis upon its usage in the high frequency amateur bands to facilitate weak signal communications and experimentation. Thousands of contacts are made with them every day, on ama teur bands from mf through microwaves. Whispering around the world one to 5 w transmitter output works well because each transmission of characters is 50 seconds in length and the computer analyzes the signal according to the complex structure thats been created by k1jt and other developers. Lets build a jtcapable station pull together all the hardware and software youll need to get on the air with jt65 and jt9. With either jt9 or jt65, world wide qsos are possible with power levels of a few watts and compromise antennas. Jul 28, 2016 over time, jt9 was added specifically for the lf, mf, and hf bands work the world with jt65 and jt9.

Work the world with jt65 and jt9 1st edition by arrl inc, steve ford wb8imy paperback, 80 pages, published 2016. Jt65a and jt65hf software weak signal digital mode on hf. Simply put work the world with jt65 and jt9 provides the tricks and tips on. While there are a few software packages available for jt65, i chose to use wsjtx. Wsjt x software to decode ft8 jt65 wspr and more digital modes. Download skype and start calling for free all over the world. On the air with jt65 and jt9 set up your software and start making contacts. The program was initially written by joe taylor, k1jt, but is now open source and is developed by a small team. Jt65 digital mode software category is a curation of 9 web resources on, wsjtx, jt65hfcomfort, jt65hf by w6cqz. The three software programmes together work like a dream. Jt65jt9 data mode software for hf amateur radio weblog by.

Digital communication via amateur radio thanks to t. This myth has byandlarge been perpetuated among the amateur radio community where many operators consider it to be a magical property of these digital modes. Heres how the weaksignal digital protocols in wsjtx work, and an overview of how their software is developed. Work the world with jt65 and jt9 group work with adolescents, third edition. Jt4 and qra64 are optimized for eme on the vhf and higher bands, and especially the microwave bands from 2. Nov 04, 20 the three software programmes together work like a dream. It will not imply as abundant as the cash provide you. The jt65 encoding and decoding routines, also used in wsjt, are developed by k1jt, joe taylor.

Reserve work the world with jt65 and jt9, by arrl inc. Jt65hf would not be possible without the efforts of joe taylor k1jt and his wsjt software upon which jt65hf is, in part, based. Jt9 signals is however only decoded over 2600 hz in the passband with this setting. Product line arrls work the world with jt65 and jt9. In the image above you can see my shack computer screen used for jt65 jt9 qsos. Jt65 is a very odd duck qsowise youre limited to characters, and the software expects a very precise exchange to occur. The jt65hf hb9hqx edition software, along with the source code, may be obtained from. Qrp digital modes such as ft8, jt9, jt65 and wspr are modes designed to be transmit and received across the world on low transmit powers although not everyone uses only low power. Worldwide qsos are possible with power levels around 1 w and compromise antennas, and several dozen jt9 signals fit easily into a 1 khz slice of spectrum. By steve ford wb8imy thanks to these two revolutionary digital communication modes, any radio amateur can easily make contacts throughout the world. Youll learn how to make contacts, and also how to use these modes as tools to test your station and study hf propagation. Dx engineering showroom, tallmadge, oh inside summit racing equipment retail store retail store is available for curbside pickup only get more details. Episode 152 the real ft8, jt65, and jt9 signaltonoise ratio revealed duration.

Work the world with jt65 and jt9 by american radio relay league. Wsjtx jt9 and jt65 modes for lf, mf and hf amateur radio. Jt9 makes it a pleasure to work very weak, low power stations thousands of miles away. It is designed to work with exellent wsjt x joe taylor, k1jt running on jt65, jt9 and ft8 modes. Download pdf work the world with jt65 and jt9, by arrl inc. Jt65 was originally designed for eme work but, along with jt9, is also very popular for weak signal and or low power work on hf. Jt65hf an odd but fun digital mode ok i know this mode is not for everyone but really what other mode has the capabilities to work the eu, south africa, south america, japan, new zealand and australia all on 40 meters, low power about 20 watts with a dipole up 25 feet on a saturday morning between 7 am and 8. Sri no decode jt65 software could not decode the exchange. Have a great time with jt9 american radio relay league.

Work the world with jt65 and jt9 kindle edition by arrl inc. I am using the sdruno software defined radio sdr signal processing software and receiver, and in. All jt9 frequencies are now exactly 2 khz higher than their jt65 cousins so on 20m the frequency pair is 14. Dec 26, 2019 although the real noise bandwidths for modes like jt9, jt65, and ft8 are approximately 1. The special design of these modes allows even weak signals to be decodable by the receiving software. It is a common myth that narrowband digital modes like ft8, jt65, etc establish communication with signals that are below noise floor. You can arrange the various windows of the software as you wish. When talking about jt65 almost all information applies to jt9 as well. Jan 27, 2016 using wsjtx software to operate jt65 and jt9 modes. By default, the software is set to decode both jt9 and jt65 signals simultaneously. If you are at the default jt65 frequency and are listening with a 3k audio bandwidth you should see jt9 from 2k to 3k. Jt65 handles very weak signals, just like wspr, so will get through where voice and psk31 wont.

Wsjt x software to decode ft8 jt65 wspr and more digital. Amateur radio software for transmissionreception of jt65 protocol on hf bands 2m 160m important. World wide qsos are possible with power levels around 1 w and compromise antennas, and several dozen jt9 signals fit easily into a 1 khz slice of spectrum. Thanks to these two revolutionary digital communication modes, any radio amateur can easily make contacts throughout the world. It has no effect when answering a cq because the software will transmit. I am finding that making jt9 contacts, works just like jt65, though the underlying protocols being sent over the air are different. It is optimized for vhf, uses about 300 hz of bandwidth, and sounds somewhat musical if listening to it. Jt65 was originally designed for eme work but, along with jt9, is also very popular for weak signal andor low power work on hf.

Work the world with jt65 and jt9 ebooks free download. Compared to the socalled slow modes jt9, jt65, qra64, ft8 is a few. Wsjt is a computer program used for weaksignal radio communication between amateur. Amateur radio software for transmissionreception of jt65 protocol. Over time, jt9 was added specifically for the lf, mf, and hf bands work the world with jt65 and jt9. Jt65, jt9, and ft8 are the most widely used wsjtx modes, and prob ably the most popular machinegener ated modes of any kind in amateur radio today. Jt9 is optimized for hf, is newer than jt65, uses only 3040 hz of bandwidth, and has a slightly higher gain than jt9. Its not my intention to dive into the technicals of any mode but to give hams practical operating information. In the image above you can see my shack computer screen used for jt65jt9 qsos. With 1minute transmission intervals, jt9 occupies less than 16 hz bandwidth. In the vast majority of cases, this simplifies to a rule of thumb of use jt65 for vhf and up, and jt9 on hf.

Skype is software for calling other people on their computers or phones. You also dont need a lot of power to make a contact you can work the world on 10 watts. You ll learn how to make contacts, and also how to use these modes as tools to test your station and study hf propagation. Lotwqrzburo73 please qsl through lotw, or the qsl bureau. Most of the time the jt9 signals will be in that hz range unless the bands are open and things get crowded. Multiple receivers work multiple bands andor multiple modes simultaneously variable filters set to 4. The calls have excellent sound quality and are highly secure with endtoend encryption. Qsl lotw 73 please qsl through logbook of the world.

Jt9 is very narrow band, one tenth the bandwidth of jt65. Work the world with jt65 and jt9 shows you how to assemble an effective station and configure the software for best performance. Arrls work the world with jt65 and jt9 0437 free shipping. This is also a strength of this mode as it makes the use of high power unnecessary.

Explore a new world of digital communicationthanks to these. I downloaded the wsjtx software, the meinberg ntp timing program to sync my computers clock, and a. I can vouch for the weak signal capability of the new jt9 1 mode. Work the world with jt65 and jt9 by american radio relay. Jt65 and jt9 signals in a single min ute, in one 4 khz slice. Clicking on the waterfall will adjust the tx and rx df, and you can add the targets callsign and signal report manually into text fields, but there is another way. Arrls work the world with jt65 and jt9 introduces you to a new world of digital communication. Aug 20, 2019 download jt65 hfhb9hqxedition for free.

Both these modes however are also used on 6m for weak sporadic e, particularly transatlantic. Work the world with wsjtx joe taylor k1jt microhams digital conference march 24, 2018. Work the world with jt65 and jt9 shows you how to assemble an effective digital communication station and configure the software for best. The digital signal processing techniques in wsjt make it substantially easier for amateur radio operators to employ esoteric propagation modes, such as high speed meteor scatter.

Nov 01, 2014 this is also a strength of this mode as it makes the use of high power unnecessary. As in pulling out stations that are 20 db into the noise weak signal. Alarmejt been designed with lazarus, written in pascal, it is only reserved for private use for amateur radio. So it would appear not to be so much jt65 being preferred for vhf, as jt65 being better suited for line of sight links and jt9 being optimized for ionospheric propagation links. Work the world with jt65 and jt9 digital communications via amateur radio. Jul 19, 2017 if you are familiar with jt65 or jt9, you know that these are weak signal digital modes. Wsjt is a computer program used for weaksignal radio communication between amateur radio operators. According to wikipedia, jt65 uses 65tone mfsk multiple frequencyshift keying, whereas jt9 uses 9tone fsk frequencyshift keying.

Sometimes is nice to view who is listening you and wspr is good tool for this. It also works many db below the noise floor, so although you may not be able to hear any signals they could be there. On july 11th, the world was introduced to the public beta of the wsjtx software version 1. There are alternative software packages available for jt65 including multipsk a commercial package developed by f6cte, and jt65hf hb9hqx edition a free software package forked from the jt65hf project developed by w6cqz. Learn how these protocols work and the advantages they offer.