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One used to be able to set the UDP address and port number for the UDP connection in Fldigi by navigating to the “I/O Ports” in the Configuration Menu or by configuring the ARQ/KISS/ I/O depending on the Fldigi version. In Fldigi v4.2.06 this does not appear to be possible anymore. I read that a linux terminal command “fldigi HOSTNAME” could be used to specify the UDP address but I installed ubuntu and it does not recognize this command. Am I missing something and if so where can I enter this UDP information?

I have been successfully using FLdigi 4.1.18 for awhile with RTTY. Yesterday I downloaded version 4.2.06.19. But every time I transmit I get a steady audio tone from the computer speaker. The thing is I changed nothing in the audio or speaker settings. And comparing the config settings between both versions they are the same. Also the computer sound settings are the same. Running Win 11. At this point I have no choice but to use the older FLdigi version. Anyone else experience this or know what can cause this? -- Fred K2DFC

http://www.w1hkj.com/alpha/fldigi/ fldigi-4.2.06.18.dmg fldigi-4.2.06.18.tar.gz fldigi-4.2.06.18_setup.exe fldigi-dark-scheme.png readme.dmg.txt readme.txt Added configurable tone shaping. This is specifc to THOR. 0 msec risetime 4 msec risetime 4 msec leading/trailing edge is similar to a CW signal. David

http://www.w1hkj.com/alpha/fldigi/ fldigi-4.2.06.17.dmg fldigi-4.2.06.17.tar.gz fldigi-4.2.06.17_setup.exe Change to THOR-25 modem, increasing interleave depth to 1 second. NOT compatible with previous test releases. This change should improve the decoder under NVIS conditions, such as Mid-Latitue disturbed: THOR-25 * add new THOR modem with following characteristics . symlen = 320 . samplerate = 8000 . flushlength = 20 . bandwidth = 460 . interleave depth = 25, 1 second . IEEE coefficients for viterbi encode/decode algorithms THOR_K15 15 K15_POLY1 044735 K15_POLY2 063057 . objective to provide highest baud within 500 Hertz bandwidth for European amateurs .CPS test text: "0123456789 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ" number chars: 66 overhead: 6.480000 sec xmt time: 10.280000 sec xmt samples: 134080 chars/sec: 6.42 * assigned secondary RsID code 691 to THOR-25 * increased flush length for all THOR baud rates * added configurable start and end of signal shaping to these modem types: . dominoEX . psk . mfsk . rtty . thor . selectable on configuration tab Modem/General * restored selectable paths to all THOR modem types Bench tests with the above test parameters produced 100% decode. 73, David W1HKJ

Here are the RF spectra of the THOR speeds from 11 to 56 sent today on 3585 kHz usb-data mode Rec'd on a SDR (RSP play) and SDR Spectrum Analyzer. The new THOR 25 (alpha) mode seems to be working well (still in alpha stage) Now wish it appears soon on FLMSG optional modes. I see all of the THOR speeds now have a longer "tail" at the end of each transmission (a few seconds) and the tones are "shaped" as described in the READ ME files written on the W1HKJ.com/alpha I think this keeps the BW to a minimum (like shaping a CW signal). On the PA NBEMS on Sunday mornings (0730 hr on 3583 kHz vfo) we typically use THOR 22 for checkins (about 500 Hz and 80 wpm) and then use MFSK 32 and THOR 32 for traffic with FLMSG or FLAMP. These are a bit faster and wider but seem to work well for 1-3 kB files. Prop was excellent today on 80m from all over the Mid-Atlantic area. QRP stations were easily copied by me as net control, well above my noise level. Here are the spectra of each THOR speed - I show the peak BW and the BW at 30dB below the peak. Not sure the current definition of "bandwidth" but I think it is the width of the signal at -26 dB below peak. We do find that THOR 11 really cuts through the noise with longer duration tones, and is especially good as a checkin mode during RTTY contests. Thor 11 feels slow, but is still around 30 wpm. de k3eui Barry Philly Dec 22 2024

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Well I am stumped, I use digital modes a lot, J8Call, VARAHF, FT4 & 8 so I know I have the right sound card settings in windows 11 to my IC-7300. Youtube has some videos, ok... But I can not get a wefax to come in. I have found the signal mostly out of New Orleans, on 4317.9 USB and a pulsing S5 to7. I can hear it on my headset but Nothing shows on FLdigi waterfall. the green receiving line is around 60 and moves with the s-meter. I have tried B/W and the color option, but they're blank. I've run it for 24 hours for possible propagation differences, but nothing is received. Thoughts, suggestions? yes the antenna is connected.. lol