52 Week Ham Radio Challenge 2025 - Week 35: Receive a weather fax transmission on HF

Challenge for 2025-08-25 - 2025-08-31:

Category: 📻 - Difficulty: 🟠

Receive a weather fax transmission on HF
The transmission schedule of the German Weather service, including the current frequencies can be found on the DWD website. Find out which software you can use to decode the transmissions and either use your own radio or a WebSDR to receive a fax transmission!


Toots mentioning this challenge

DateUserUser scoreStatusToot summary & link
2025-03-17 15:58:41n8dmt@mastodon.radio14Success!Tried out iPad SDR-Control HF-FAX mode on the IC-705 with the indoor magnetic loop antenna. Found a station on 12.786 MHz (NMC from Point Reyes USA) and was able to decode a partial map showing WX Southeast of Mexico. There is a trick to make this work (Mode = USB, dial frequency is set 1.9 KHz lower than station frequency).#HamChallenge HC35S Receive a weather fax transmission on HF. @hamchallenge
2025-03-17 23:31:28kr1st@mastodon.radio3Success!Inspired by this post from @n8dmt I wanted to see if my OpenWebRx+ using a small active loop would be able to receive and decode weather fax:https://mastodon.radio/@n8dmt/114178359563833037Sure enough it would receive NMF-Boston just fine on 6338 kHz, even during daylight hours with a little QSB.I guess I unlocked #HamChallenge achievement HC35S. 😀 It makes me wonder if this is actually still used by ships.@hamchallenge
2025-03-17 23:39:29n8dmt@mastodon.radio14Working on it...@kr1st WOW! (I’m going to have to take a serious look at my antennas…) Congrats on showing how these WX maps should look — given good receiver and antenna. HC35 #HamRadio

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