Sound settings can now be changed in the LongChat setup menu in NEW release 1.3.00 . “CQ CQ CallSign” can be transmitted by one click to CQ button. New release notification will be displayed when the LongChat first starts. Untested radios starts with * character. Make sure to modify the radio settings as explained in the setup manual. If you test a new radio, please prepare a short document to add in the user manual. LongChat-Version-Info.pdf file has all the release information.
Thanks for taking the time and effort to share your project!. It shows the best of ham radio, the experimental side which is sadly becoming less popular thses days. I also experimented with the Lora RA01 modules at low bandwidth and various spreading factors using the mysensors iot project. 73
Thank you for your encouraging comment. A 3$ chirp sensor transmitter that communicates with LongChat is possible. Just a si5351, a cheap microprocesser, one crystal , one LC filter. No modulator, no mixer, no rf amplifier. I want to build and experiment with one when I have some free time.
Seems like a solid contribution to the amateur radio. Congratulations. To support better understanding of the mode and its capabilites, a whitepaper and/or technical description would be great.
Thank you for the interesting video! Have you planned to recommend any calling frequencies for the LongChat mode on the the HF-bands, like for example on the 20 meter band? 73's de OH6XG, Christian
Sound exciting, will be nice to see some deep documentation and source code to build a community around this idea and give possibility to built non windows apps - especially that many hams play with raspberry like SBCs and it looks like really nice alternative for e.g. JS8call.
Cool, could you publish the source code and the full protocol specification, most amateur radio operators can't blindly use this as we don't know if you are using encryption or other methods of obfuscation. Thanks.
I gathered some information on JS8 from ChatGbt. This also looks like an impressive digital mode. It seems to require 1 minute time sync interval and PC clock accuracy of 1 sec. Calculating Eb/No of JS8 or any other mode with long sync time gets complicated since energy expenditure is also required during these intevals. LongChat does not require a long synch interval. All sync is done within the preamble+data block. And no need for precise PC clock alignment. I am not familiar with JS8. Please correct me if I missed some points.
It would be good if we could configure our own transceiver (COM port etc) and sound card settings, as can be done with other software, example WSJT-X. 73.
I use an old version of Hamlib. I think Hamlib also supports SDR radios. I will note your request. I will release a new version tomorrow wit more radios added but untested.
Nice start of a new mode. I tested it and find out that the soundcard of the radio must be the "default" soundcard in Windows otherwise the radio don´t transmitt it out. Would be nice to add a soundcard selection in the software otherwise all Windows sounds are transmitted to rf.
Yes correct, this is explained in section 2.5 and 2.6 of the user manual. I noted your suggestion to change the sound settings within the software menu. Thanks for the feedback. Could you test it at the field ?
@LongChat-b1l I try to find a friend for test but not all own the Icom radios. So it will be importend to add more radios and the ability to use a com port for switching PTT via RTS or DTR. After that most hams can use it.
You are absolutely right. Thanks for pointing it. Normally I use USB at the lower band edge and LSB at the upper band edge. While setting the modes, it is easy to forget it. I guess I relied too much on IC-7300 to block tansmisson on edges. IC-7300 does allow it though.
I believe he is referring to the 1500 watts allowed here in the US. Totally unnecessary for most digital modes. I do have a question in regard to power. What outcome do you anticipate for 5 to 20 watts, also on lower bands? Thank you for your contribution to our hobby. 73. Edited for spelling.
@@Locksnut This is a really good question. Imagine you are on HF SSB voice. Voice can be intelligible with an SNR of around 6-10 dB. If you were to test LongChat under these conditions, you can initially decrease your TX power by 10 ( i.e if you are on 20 watt you decrease it to 2 watt) and receive messages easily over LongChat. At this point, you would check the SNR value displayed on Longchat and continue decreasing the TX power until you go down to -13 db limit. I hope this answers your question.
This method of communication would be very effective in the following scenarios: 1. Emergency Communication where power is limited - Like bushfire situation, 2. Disaster situation where Grid is down, and traditional communication infrastructure is unavailable - like earthquake. I am wondering can it be made portable enough so that it can be used by hikers, campers etc.?
With 45 μW to 2.3 km, looks very promising. Love to see how it will do at greater distances and in more challenging environments, such as in a storm or via sky-wave. Say, when you do part II, please include a comparison to LoRa. Also, can we use it with a cheap 433 MHz module-pair?
@@LongChat-b1l The spectrum from 50.620 to 50.750 would be designated for digital communication. Alternatively 50.9 to 51.2 and 51.4 to 52.0 MHz for wideband digital communication. 50.000-50.030 should be particularly avoided due to it's use for the coordinated beacon project. (IARU Region 1 VHF band plan)
I am not familiar with Fldigi. I just had a quick look now. LongChat is not integrated in Fldigi. I will sure revisit it in future. Thanks for raising the issue.
If you like to test it I can add FT950. Just let me know. I actually can add most of the radios but I don't have the opportunity to test them without having the radio physically. It does use the sound card if you set it from the PC sound settings. You just need a virtual audio cable like VB audio cable.
@LongChat-b1l hi, it shouldnt need to use VAC. All other programs use PC sound card as default. I think you are focusing on CAT control or USB sound. USB sound isnt on majority of older radios.
@@zicadibrove4119 LongChat can receive data from a soundcard, from a wav file, from a usb codec of a new radio. It is selectable by the PC sound input output settings. 1. You can connect your old radio analog output to your PC microphone input and LongChat get data from your sound card. 2. You can select usb audio codec of your new radio in your sound settings and LongChat can get digital data over the usb cable. 3. You can play a prerecorded wav or similar sound file with mediaplay or other players and LongChat can get data of the wav file I will put a sample chirp wav file in the shared files so that you may try LongChat without a receiver.
@@LongChat-b1lit dosnt work. My PC is already set up for this and it currently works for all other programs such as wsjtx, multipsk etc. Your program has no settings for just running from PC souncard. It only allows you to select rig model
@@zicadibrove4119 This is done on the PC side. Right click the sound icon(loudspeaker icon) on your PC, open sound settings, you will see sound out and in options. Connect your receiver audio out cable to microphone input. Choose your input device as microphone. Your PC soundcard will convert analog audio to digital data. Choose the dummy rig selection from LongChat. You also need to have a serial port connection. Logically this should not be necessary in dummy rig mode. But that's how the software works at the moment . It does not really use the serial port. Just behaves like using it in dummy rig mode. Good Luck.
Thanks for the feedback on soundcard settings. Can you elaborate on what you mean on Google spyware software. I use my google drive to share my files. There are only 3 files there. LongChat software, LongChat user manual and LongChat brochure. Were there any problems ? Let me know.
Sound settings can now be changed in the LongChat setup menu in NEW release 1.3.00 . “CQ CQ CallSign” can be transmitted by one click to CQ button. New release notification will be displayed when the LongChat first starts. Untested radios starts with * character. Make sure to modify the radio settings as explained in the setup manual. If you test a new radio, please prepare a short document to add in the user manual. LongChat-Version-Info.pdf file has all the release information.
Very interesting. Chirp is also used in LoRa afaik. Nice to see it as software for the 7300.
Thanks for taking the time and effort to share your project!. It shows the best of ham radio, the experimental side which is sadly becoming less popular thses days. I also experimented with the Lora RA01 modules at low bandwidth and various spreading factors using the mysensors iot project. 73
Thank you for your encouraging comment. A 3$ chirp sensor transmitter that communicates with LongChat is possible. Just a si5351, a cheap microprocesser, one crystal , one LC filter. No modulator, no mixer, no rf amplifier. I want to build and experiment with one when I have some free time.
Let me know when an open source version is available for Linux, then I'll be glad to check it out.
no, "when it's open source"
@@RoelandJansen Then no interest. There's already several weak signal modes where text can be sent. No need for another.
Me too 🙂
Great idea. Similar data rate to RTTY but with the weak signal performance of LoRa !
Thanks for the feedback
Seems like a solid contribution to the amateur radio. Congratulations. To support better understanding of the mode and its capabilites, a whitepaper and/or technical description would be great.
Also a Linux Ham, I love JS8call, you can see me chatting with Hosana in his JS8Call live video a couple years ago. Windows is a no go.
Thanks for the feedback. I used windows and c# due to my previous work experience. It is not easy to learn and switch to a new environment
Ups! THAT sounds good to try! Will download the .zip now and will check it. Many thanks for that very nice pice of Software!!
Thanks. If you happen to have any questions during tests please e-mail me at longchat.info@gmail.com or you may just write here.
Thank you for the interesting video! Have you planned to recommend any calling frequencies for the LongChat mode on the the HF-bands, like for example on the 20 meter band? 73's de OH6XG, Christian
This is something I also would like to learn from experienced radio hams.
Looks cool. Good luck!
Sound exciting, will be nice to see some deep documentation and source code to build a community around this idea and give possibility to built non windows apps - especially that many hams play with raspberry like SBCs and it looks like really nice alternative for e.g. JS8call.
Thank you for the feedback
Cool, could you publish the source code and the full protocol specification, most amateur radio operators can't blindly use this as we don't know if you are using encryption or other methods of obfuscation. Thanks.
Hams are allergic to open source for some reason.
I understand your concerns. I will try to adress these concerns and present my side of the story in the future.
@@someguy782 because most HAM software has intel backdoors in it.
@@StuttgartHD I wouldn't be surprised, but where are you getting that info?
@@someguy782 So why not program it yourself? 😂
VERY unfortunate that there's seemingly no repository. I'd like to see that work on linux.
Agree. Microsoft is not the only game in town. Would like to see this up on a git repo.
@@SparkyRadio999 agreed.
I am a keen user of JS8 mode for DX chats. I am very interested to see how this mode compares.
I gathered some information on JS8 from ChatGbt. This also looks like an impressive digital mode. It seems to require 1 minute time sync interval and PC clock accuracy of 1 sec. Calculating Eb/No of JS8 or any other mode with long sync time gets complicated since energy expenditure is also required during these intevals. LongChat does not require a long synch interval. All sync is done within the preamble+data block. And no need for precise PC clock alignment. I am not familiar with JS8. Please correct me if I missed some points.
It would be good if we could configure our own transceiver (COM port etc) and sound card settings, as can be done with other software, example WSJT-X.
73.
Thanks for the feedback
it works!
ready for sked on 40m
73 de R1LB
How did you test it ? Power output ?
@spotonnls3538 ic7300 tx 5 W @ whip ant. (remote controle) & x6100 xiegu mobile whip
@spotonnls3538 remote tx ic7300 5W @ GP and mobile x6100 rx @ whip
@@leobovin Thanks for the feedback.
Looking forward to test it. 👍🏻
Thanks. If you happen to have any questions during tests please e-mail me at longchat.info@gmail.com or you may just write here.
Very interesting... Independent from any GSM or public networks, and will operate in case of any urgent need- emergency needs.
Can you implement FLRig control? Could be very useful for those with sdr radios like Hermes lite. Many hams are using them for VarAc.
I use an old version of Hamlib. I think Hamlib also supports SDR radios. I will note your request. I will release a new version tomorrow wit more radios added but untested.
👏Super. 45uW; 2.3km digital new mode. This is a candidate of new IOT communication mode.
Nice start of a new mode. I tested it and find out that
the soundcard of the radio must be the "default" soundcard in Windows otherwise the radio don´t transmitt it out.
Would be nice to add a soundcard selection in the software otherwise all Windows sounds are transmitted to rf.
Yes correct, this is explained in section 2.5 and 2.6 of the user manual. I noted your suggestion to change the sound settings within the software menu. Thanks for the feedback. Could you test it at the field ?
@LongChat-b1l I try to find a friend for test but not all own the Icom radios. So it will be importend to add more radios and the ability to use a com port for switching PTT via RTS or DTR. After that most hams can use it.
Sound settings can now be changed in the LongChat setup menu in NEW release 1.3.00 . Please download it from the shared drive.
Vatana Millete Hayırlı Uğurlu Olsun.... TA2VTC
Merhaba. Dün akşam test için iletişimde olduğum arkadaş sizdiniz galiba ?
@LongChat-b1l merhaba evet bendim :)
You need to release the source code, this needs to be vetted before anyone can use it.
Protocols need to be made public.
👏👏congrats
Transmitting right on the band edge 50.000.000 and LSB, that means your actual signal will be outside of the Amateur band. No?
You are absolutely right. Thanks for pointing it. Normally I use USB at the lower band edge and LSB at the upper band edge. While setting the modes, it is easy to forget it. I guess I relied too much on IC-7300 to block tansmisson on edges. IC-7300 does allow it though.
Can't wait to see how it works out with legal limit.
Can you elaborate on that please?
I believe he is referring to the 1500 watts allowed here in the US. Totally unnecessary for most digital modes.
I do have a question in regard to power. What outcome do you anticipate for 5 to 20 watts, also on lower bands? Thank you for your contribution to our hobby. 73. Edited for spelling.
@@Locksnut This is a really good question. Imagine you are on HF SSB voice. Voice can be intelligible with an SNR of around 6-10 dB. If you were to test LongChat under these conditions, you can initially decrease your TX power by 10 ( i.e if you are on 20 watt you decrease it to 2 watt) and receive messages easily over LongChat. At this point, you would check the SNR value displayed on Longchat and continue decreasing the TX power until you go down to -13 db limit. I hope this answers your question.
This method of communication would be very effective in the following scenarios: 1. Emergency Communication where power is limited - Like bushfire situation, 2. Disaster situation where Grid is down, and traditional communication infrastructure is unavailable - like earthquake.
I am wondering can it be made portable enough so that it can be used by hikers, campers etc.?
It is possible. Just a small portable RX/TX radio or hardware needed.
With 45 μW to 2.3 km, looks very promising. Love to see how it will do at greater distances and in more challenging environments, such as in a storm or via sky-wave. Say, when you do part II, please include a comparison to LoRa. Also, can we use it with a cheap 433 MHz module-pair?
I intend to build a 433 Mhz Si5351 based very low cost TX module for low power sensor and communications applications that works with LongChat
@@LongChat-b1l How would this module be different from Meshtastic? Similar chirp method, same frequency (if 433MHz, which is used in Europe).
Is there some common freqs for this on the Hamster bands ?
LongChat is only a few days old. Maybe as hams start using it , they will have their recommendations.
Interesting location. Very dry and odd building placement. Is it Turkey?
Yes
Hello i want tested but my TX isn't in the list when an amelioration for Yaesu 857D 73
I added it. Please download the new version 1.2.08. But it is untested. You need to try.
That's a unique product, vital for disaster zones affected by tornados, floods, earthquakes.. Very promising.
Unfortunately, there are dozens of competing transmission modes and software products for ham radio and EmComm
Were you transmitting below the bottom of the 6m band?
I'm surprised that the IC-7300 allows that
I was at 50 mhz with LSB. You are right.
@@antoineroquentin2297 It does allow.If carrier goes one hertz below 50 mhz, it disables TX.
You are right. Normally I use USB at the lower band edge and LSB at the upper band edge. While setting the modes, it is easy to forget it.
@@LongChat-b1l The spectrum from 50.620 to 50.750 would be designated for digital communication.
Alternatively 50.9 to 51.2 and 51.4 to 52.0 MHz for wideband digital communication.
50.000-50.030 should be particularly avoided due to it's use for the coordinated beacon project.
(IARU Region 1 VHF band plan)
Works great
Could you try it ?
Hi! Congratulations! Please link for dawnload longchatt!??
Link is already in the video description.
@LongChat-b1l ok thank you!
I'm looking forward to your next video DE WA1KLI
Is there a git repo for the software? I'd be interested in porting the software to be used on non-windows (and potentially non-gui) devices.
Sorry, no.
@@LongChat-b1l alrighty. Hoping there will be
is this compatible with Fldigi?
I am not familiar with Fldigi. I just had a quick look now. LongChat is not integrated in Fldigi. I will sure revisit it in future. Thanks for raising the issue.
Looks great but it would need to use PC sound card for wide adoption. I have Yaesu FT950 and cant use it
If you like to test it I can add FT950. Just let me know. I actually can add most of the radios but I don't have the opportunity to test them without having the radio physically. It does use the sound card if you set it from the PC sound settings. You just need a virtual audio cable like VB audio cable.
@LongChat-b1l hi, it shouldnt need to use VAC. All other programs use PC sound card as default. I think you are focusing on CAT control or USB sound. USB sound isnt on majority of older radios.
@@zicadibrove4119 LongChat can receive data from a soundcard, from a wav file, from a usb codec of a new radio. It is selectable by the PC sound input output settings.
1. You can connect your old radio analog output to your PC microphone input and LongChat get data from your sound card.
2. You can select usb audio codec of your new radio in your sound settings and LongChat can get digital data over the usb cable.
3. You can play a prerecorded wav or similar sound file with mediaplay or other players and LongChat can get data of the wav file
I will put a sample chirp wav file in the shared files so that you may try LongChat without a receiver.
@@LongChat-b1lit dosnt work. My PC is already set up for this and it currently works for all other programs such as wsjtx, multipsk etc. Your program has no settings for just running from PC souncard. It only allows you to select rig model
@@zicadibrove4119 This is done on the PC side. Right click the sound icon(loudspeaker icon) on your PC, open sound settings, you will see sound out and in options. Connect your receiver audio out cable to microphone input. Choose your input device as microphone. Your PC soundcard will convert analog audio to digital data. Choose the dummy rig selection from LongChat. You also need to have a serial port connection. Logically this should not be necessary in dummy rig mode. But that's how the software works at the moment . It does not really use the serial port. Just behaves like using it in dummy rig mode. Good Luck.
Hi, are you by chance in Turkey?
Yes
Seems like Meshtastic for HF (or any other ham frequency), except closed-source.
Is mesthtastic open source ?
@@spotonnls3538 Yes.
@@AD6DMDennis I think meshtastic supports Lora protocols only. Do you think it is possible to integrate LongChat into meshtastic ?
Why all the Google spyware software?
Also it needs a config menu for selecting sound card usage. Not everyone owns an Icom Radio
Thanks for the feedback on soundcard settings. Can you elaborate on what you mean on Google spyware software. I use my google drive to share my files. There are only 3 files there. LongChat software, LongChat user manual and LongChat brochure. Were there any problems ? Let me know.
Sound settings can now be changed in the LongChat setup menu in NEW release 1.3.00 . Please download it from the shared drive.
Android?
Not yet
SSB or go home. Texting is for phones.
ok boomer