Questions tagged [ft8]
For questions specific to the FT8 mode
26
questions
2
votes
2
answers
44
views
Fox & Hound or regular FT8 for ARRL International Digital Contest?
So I'm thinking about casually working the ARRL Int'l Digital contest this weekend to try to pick up (hopefully they'll confirm!) a couple of new DCXX entities so I can get my DXCC (almost there).
...
- 873
0
votes
3
answers
92
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Linux Alternative Time Sync-ing for JS8 or FT8
I was learning about the time drift set and correct features of JS8Call and wondering about an alternative.
Assume I have a wrist watch that loses 1 second a month and that it's been sync-ed to an NTP ...
- 259
3
votes
2
answers
112
views
Can someone without privileges on a band operate FT8 on it using the callsign of a ham who does and is present?
I have an Extra license. Is it legal for my dad (who has a Technician license) or my mom (who is not licensed) to operate FT8 on 20 meters using my call sign, if I am physically present at the control ...
- 259
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vote
1
answer
429
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wsjt-x problems with windows 11
When upgrading from previous version of the windows operating system to windows 11 wsjt-x stops receiving the output from the radio. What should I look for?
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4
votes
2
answers
119
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How do you log (or not) "busted" FT8 QSOs?
When do you decide (when NOT in a contest) to log an "incomplete" FT8 QSO? For example, something like this:
...
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6
votes
2
answers
215
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FT8 etiquette when no reply after responding to CQ?
When you respond to an FT8 CQ and the other side doesn't respond after a couple of your transmissions, what is proper etiquette? (Assuming you're working split and not transmitting on his receive ...
- 873
3
votes
1
answer
315
views
Why is IC-7300 transmitting at zero power in "Rig" split mode with WSJT-X and FT8?
I am successfully running FT8 with WSJT-X on Windows 10 with my IC-7300. I am using IC-7300 as the rig.
On reading the official WSJT-X User Guide (and various ...
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9
votes
2
answers
3k
views
Am I really receiving FT8 signals from 12,000 km away on 144 MHz?
I have been using an Ettus B200 SDR to receive FT8 transmissions in the 2-meter band (144.174 MHz) using the WSJT-X software. Signals are received using a telescopic antenna inside on a window ledge ...
- 276
0
votes
1
answer
69
views
FT8 in slow motion?
Do FT8 operators typically respond to very late replies for an entire QSO? (for instance, transmitting in the 3rd slot or 5th slot after a CQ, to maintain even/odd alternation, instead of the time ...
- 12.5k
3
votes
1
answer
243
views
If WSPR can go further than FT8, why do I only see local WSPR signals?
I've been scanning through the bands using WSJT-X to pick up FT8 and WSPR. Using a VHF discone, I decode messages from nearly 10,000 km away, consistently, when listening for FT8. But when switching ...
- 163
3
votes
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answer
107
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FT8 low-density parity check code
The FT8/FT4 communication protocols use an 83x91 generator matrix for the low-density parity check code. I am interested in MATLAB recasting of portions of these protocols. Can anyone explain to me ...
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votes
2
answers
337
views
FT8 callsign/maidenhead compression encoding
I have set myself a challenge to write a Matlab script as proof of concept to send an FT8 CQ call (not necessarily for live transmissions yet, but I may extend the project). So far I have:
Generated ...
- 83
5
votes
1
answer
507
views
5
votes
3
answers
808
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Only noise, no signals whatsoever on HF
Last night there was a power outage at home. I was able to see a LOT of stations on 20M (FT8). As soon power returned, all of them disappeared. You can see in the waterfall very clearly when power ...
- 1,159
5
votes
3
answers
1k
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Unidentified signals on FT8 frequencies
When I work in FT8 mode I often see signals like these:
I couldn't identify these signals using SigiWiki nor managed I to decode them using WSJT-X. Though these signals seem to use 15 second frames. ...
1
vote
1
answer
661
views
Should I add call signs with /R suffix to the logbook?
Sometimes in FT-8 mode I receive calls like this one:
It happens 2-3 times a week.
The problems are: 1) I never could look up such call signs 2) I tried to reply, but never got answer 3) I don't ...
1
vote
1
answer
74
views
How many HF (FT8/JT65/BPSK/RTTY etc) amateurs are active in Canada? [closed]
It's silent over there... USA is full of FT8 stations, in Canada you can count them on one hand and you don't even need all your fingers...
10
votes
1
answer
643
views
What does CQ NM mean in FT8?
I saw someone on 20m FT8 this morning calling "CQ NM". What does NM mean in this context? They followed the NM with their call and grid as usual.
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votes
2
answers
3k
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WSJT-X V2: How to identify stations already logged?
In V1.9 of WSJT-X, there was a feature that allowed one to change the color of stations already logged. This was necessary in knowing whether or not to respond to a given CQ.
In version 2, I am ...
- 171
4
votes
2
answers
1k
views
What is the minimum equipment necessary to get on the air with FT8?
To the extent that FT8 is a way to bring people into the hobby or re-ignite passion among those who haven't been on the air in a while, what's the easiest way to get someone on the air with this new ...
- 255
4
votes
1
answer
3k
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Can the IC-7300 be connected straight to a computer and use WSJT-X for FT8?
Do I need a separate device to use digital modes with the IC-7300 or do I just need to connect the 7300 to my computer via USB in order to use WSJT-X for FT8?
Thank you.
- 171
1
vote
1
answer
205
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Can WSJT-X's timing account for delay from RCForb?
I was using FT8 through a remote in RCForb. Reception in FT8 is spotty through the remote. I do not have an HF rig to test if the remote is the problem. So far, I think it is the delay through the ...
- 13
3
votes
1
answer
369
views
How/where can I learn about ft8? [closed]
Where can I find information about the digital modes and how to get started on them? I would like a concise yet easy to understand tutorial.
4
votes
2
answers
1k
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Long callsigns in WSJT-X?
During the month of May (2018) a lot of Belgian club stations can use callsigns in the format OT70xxx. (The xxx is always 3 letters, for example our club station uses OT70TRA.)
In WSJT-X it seems ...
- 783
4
votes
1
answer
143
views
What does retain mean in the logging of WSJT-X 1.8.0?
If you have automatic prompt for logging on WSJT-X, at the end, you get this dialog:
What does the "Retain" checkboxes do when you check them?
9
votes
2
answers
456
views
What does exclamation mark mean in FT8 CQ calls in WSJT?
For example, in this screenshot:
WSJT shows !Italy, !Serbia, !U.S.A. What does it mean?