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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