Join Date: Jul 2000
Thanked 184 Times in 173 Posts
Rep Power: 17
Re: Weatherfax audio file for testing
You inspired me to do my own little test this morning. I found that I was receiving solid signals (S9+20db) from the 4Kilowatt NMG New Orleans Coast Guard transmitters during their morning run of WEFAX transmissions. The image below was received through a modern HF amateur radio transceiver and fed into the Multimode for Mac program. The frequency was 8502 kHz USB.
As you can see, the image is fair at best, even with a very solid S9 signal and modern reception gear. This is typical of the images I've been able to pull in. The pics are fair at best and most of the time I can barely make out the notations.
Has anyone else had better luck pulling in higher quality pictures over HF? Let's see what you got!
By the way, I also set my iPad next to the speaker with that BlackCat Wefax program running and, while the same image did appear on the iPad, it was far worse quality!
with Multimode (Cocoa) adjust your radio squelch and output volume (horizontal 'slider' on the top right of the Multimode window) to clarify and adjust such pics., using the 'slider' and your radios fine tune frequency control to maximize the received 'peak' wave forms overlayed and centered to one of the 'red' reference lines in that 'box' at the top right in the multimode window.
Also be sure that youre set up for "line" instead lf 'grey"; "LINE" function is for line charts, "grey" is for satellite pics.
Also be aware that the current sunspot activity is nearing its maximum .... lots of good propagation but can have lots of distortion 'background noise' which can distort your reception.