Hot answers tagged

10

Now that I've seen a few other 2 letter abbreviations, I've figured out it means they're looking for a contact in New Mexico.


8

You can find the code in packjt77.f90. Callsign encoding (for "standard" callsigns that don't require hashing) is in function pack28. A quick summary: Adjust a few strange prefixes that don't follow the usual arrangement of letters and numbers. Swaziland 3DA0* will be encoded as if it was 3D0* instead, and Guinea 3XA1A will be encoded as if it was ...


8

Yes, you only need a USB2 A to B cable. The IC-7300 already has an integrated sound card, for audio signal transmission, and an integrated serial port for remote control, both of which are connected to computer using the USB2 B port at the back of the radio. In some rare cases, you might also want a Icom CT-17 compatible interface cable. Namely, the ...


6

That is something that is activated by "Show DXCC entity and worked before status" (selectable on the "Settings" > "General tab"). From the manual: When this option is checked WSJT-X appends some additional information to all CQ messages displayed in the Band Activity window. The name of the DXCC entity is shown, abbreviated if necessary. Your “worked ...


5

The fact that they align properly to the FT8 15-second period, and have 8 tones (the same as FT8) is a sign that these may be distorted FT8 signals, caused by AF harmonics in the transmitter or the receiver. The one on the right, being about 100Hz wide, is a second harmonic, and the one on the left, being about 150Hz wide, may be a third harmonic. But ...


5

Found on the JTDX groups.io (link won't work without login, unfortunately): sybmol • - this operator loaded his log into LoTW symbol ° - this operator loaded his log into LoTW and this is Hint decode (FT8 AP or matched filter based decoder in JT65 JT9 T10 modes) symbol * - Hint decode (FT8 AP or matched filter based decoder in JT65 JT9 T10 modes) So ...


5

When those boxes are checked, the values entered will be retained as the defaults for the next QSO to be logged. Unchecked, the fields will revert to blank.


5

Without getting into specific product recommendations, I believe the simplest way is as follows: Obtain a license. An amateur license is required for using amateur bands. I am not aware of any non-amateur bands using FT8. A technician-level license is sufficient in USA for VHF and UHF but it looks like a General level license is needed for the HF bands. ...


4

My guess, looking at WSPR reports, is that, on average (median), WSPR beacons are transmitted at power levels maybe in the range of 10 to 30 dB lower than the median of FT8 transmissions. e.g. 20 dBm Raspberry Pi hat vs. 37 dBm QRP SDR, or 30 dBm WSPR appliance vs 50+ dBm desktop transceiver and/or QRO amp, as bracketing examples. So the reported 10 dBm ...


4

For the current "77-bit" versions of FT8 and MSK144 (as supported by wsjt-x version 2.0, released in late 2018, and newer), you can use these callsigns without doing anything special. Any combination of letters, numbers, and slashes, up to 11 characters total, can be used as a callsign. If your callsign is "nonstandard", meaning that it doesn't follow the ...


4

There is a lot you haven't told us about the current situation that could be helpful. Since your dad lives so close, perhaps you can make various substitutions to identify the problem. For example, what do you hear from the speaker or headphone jack of the TS-450S when using your station antenna? If you hear nothing, then you should expect to see nothing on ...


4

FT8 decoding can use a technique called a priori (AP) whereby it uses naturally accumulating information for the purposes of increasing apparent sensitivity by about 4 dB. There is an increased chance of false decodes when AP is enabled since AP is essentially sophisticated guess work. The technique looks at its guessed result and compares it to the parity ...


3

Both marked signals follow an 8 tone MFSK pattern. The one on the left is about 125 hertz wide while the one on the right is about 100 hertz wide. The signal on the left appears to follow the waterfall that would be expected from an Olivia 8/125 (8 tones with 125 hertz bandwidth) signal although this is not a common Olivia mode. Olivia is a free typing, ...


3

Set your "New Call" to one color and your "CQ in message" to a different color. My new call CQs are green and my "CQ in message" are light red. The light red indicates that I have worked the station before because it is not a "New Call". And as Chris said, JTAlert also works. The logic is that the combination of "New Call" and "CQ Only" result in New Call ...


2

According to K1JT himself, the callsign field is rather restricted and must meet the same parameters as the one for JT65. https://sourceforge.net/p/wsjt/mailman/message/35254350/


2

When you suspect timing problems with FT8 decodes, simply manually adjust your computer clock to see if the situation improves. This is also the standard recommendation when you suspect the transmitting station's clock is off. It is quite possible that you are having timing issues since the Internet is nondeterministic. It is not uncommon that in a ...


2

If there is any merit to your claim, consider that Canada has ~ 69,000 hams while the US has ~800,000 hams according to Wikipedia. With less than 10% of the number of hams in Canada compared to the US, it is plausible that for any mode you will hear far less Canadian hams than US hams. If you then project that the population density of hams follows the ...


2

QRM is extremely common nowadays due to a great increase in switch-mode power supplies that tend to desensitize nearby receivers, hence the reason why many Hams put up a shack away from the house. Simply because there isn't noise on the exact frequency you're on, doesn't mean you're not experiencing interference. You might want to try a band pass filter for ...


1

I am really going to echo what @pappad said. Get a large 12V battery and connect to your radio. Turn all the power off in the house - and check you can hear the stations on FT8/CW etc. This will be the quietest your environment can be. But if you are not hearing anything at this stage (note I am saying hearing... not visualising on a PC screen) then there ...


1

With a quick search I found several documents where you can get information about using FT8: Getting Started on FT8 — ARRL-hosted powerpoint FT8 operating guide — PDF with setup and tips, hosted by the inventor of the mode Setting up FT8 — a blog post that looks helpful For a bit more background: FT8 is a "digital mode", so any general setup and basic ...


Only top voted, non community-wiki answers of a minimum length are eligible