Re: [digitalradio] Hellschreiber on-air comparison
Hi Tony, I have often switched from FH to FSK-Hell when working the States from VK via the Long-Path on 20M when conditions are poor. Often switching to FSK was the only way to complete (or even initiate) the QSO and the improvement in copy was often quite dramatic, from very difficult/impossible copy to arm-chair copy. de Laurie, VK3AMA It does seem to make a a substantial difference on long-haul propagation Laurie. Please feel free to send me any screen shots you might have - it's always interesting to see how the different modes print under tough conditions. Thanks, Tony -K2MO On 3/08/2010 10:32 AM, Tony wrote: All, I spent a little time this weekend comparing FSK-Hell to the standard Feld Hell mode. FSK-Hell is a modified version of PSK-Hell which was developed to improve readability over HF. The difference tends to show up more on long-haul paths where signals are more likely to encounter ionospheric distortion. Unfortunately, I didn't find any DX, but I did manage to work a few west coast stations from here in W2. I didn't expect to see much of an improvement since conditions on 20 meters were relatively quite (moderate multi-path fading), but in practice, there was a noticeable difference. Contrast was noticeably improved and the text did stand out more with FSK-Hell than it did with Feld Hel. This is especially true with weak signals. The 105 baud mode allows even more contrast which shows up both on-air and with the path simulator. All in all, FSK-Hell does offer better readability over Feld Hell. Click on the link below to see an on-air and example of how the modes compared. FSK-Hell is available in IZ8BLY's Hellschreiber (FM-Hell), DM780, MixW and Multipsk. http://www37.zippyshare.com/v/71092013/file.html Tony -K2MO http://www.obriensweb.com/digispotter.html Chat, Skeds, and Spots all in one (resize to suit) Facebook= http://www.facebook.com/pages/digitalradio/123270301037522 Yahoo! Groups Links __ Information from ESET NOD32 Antivirus, version of virus signature database 5335 (20100802) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
Re: [digitalradio] Hellschreiber on-air comparison
On 8/2/2010 9:21 PM, Dave Wright wrote: Also available in Fldigi. Thanks for pointing that out Dave. Tony -K2MO On Aug 2, 2010, at 8:32 PM, Tony wrote: All in all, FSK-Hell does offer better readability over Feld Hell. Click on the link below to see an on-air and example of how the modes compared. FSK-Hell is available in IZ8BLY's Hellschreiber (FM-Hell), DM780, MixW and Multipsk. Dave K3DCW www.k3dcw.net http://www.k3dcw.net __ Information from ESET NOD32 Antivirus, version of virus signature database 5335 (20100802) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
[digitalradio] Hellschreiber on-air comparison
All, I spent a little time this weekend comparing FSK-Hell to the standard Feld Hell mode. FSK-Hell is a modified version of PSK-Hell which was developed to improve readability over HF. The difference tends to show up more on long-haul paths where signals are more likely to encounter ionospheric distortion. Unfortunately, I didn't find any DX, but I did manage to work a few west coast stations from here in W2. I didn't expect to see much of an improvement since conditions on 20 meters were relatively quite (moderate multi-path fading), but in practice, there was a noticeable difference. Contrast was noticeably improved and the text did stand out more with FSK-Hell than it did with Feld Hel. This is especially true with weak signals. The 105 baud mode allows even more contrast which shows up both on-air and with the path simulator. All in all, FSK-Hell does offer better readability over Feld Hell. Click on the link below to see an on-air and example of how the modes compared. FSK-Hell is available in IZ8BLY's Hellschreiber (FM-Hell), DM780, MixW and Multipsk. http://www37.zippyshare.com/v/71092013/file.html Tony -K2MO
Re: [digitalradio] Hellschreiber on-air comparison
Also available in Fldigi. On Aug 2, 2010, at 8:32 PM, Tony wrote: All in all, FSK-Hell does offer better readability over Feld Hell. Click on the link below to see an on-air and example of how the modes compared. FSK-Hell is available in IZ8BLY's Hellschreiber (FM-Hell), DM780, MixW and Multipsk. Dave K3DCW www.k3dcw.net
Re: [digitalradio] Hellschreiber on-air comparison
Hi Tony, I have often switched from FH to FSK-Hell when working the States from VK via the Long-Path on 20M when conditions are poor. Often switching to FSK was the only way to complete (or even initiate) the QSO and the improvement in copy was often quite dramatic, from very difficult/impossible copy to arm-chair copy. de Laurie, VK3AMA On 3/08/2010 10:32 AM, Tony wrote: All, I spent a little time this weekend comparing FSK-Hell to the standard Feld Hell mode. FSK-Hell is a modified version of PSK-Hell which was developed to improve readability over HF. The difference tends to show up more on long-haul paths where signals are more likely to encounter ionospheric distortion. Unfortunately, I didn't find any DX, but I did manage to work a few west coast stations from here in W2. I didn't expect to see much of an improvement since conditions on 20 meters were relatively quite (moderate multi-path fading), but in practice, there was a noticeable difference. Contrast was noticeably improved and the text did stand out more with FSK-Hell than it did with Feld Hel. This is especially true with weak signals. The 105 baud mode allows even more contrast which shows up both on-air and with the path simulator. All in all, FSK-Hell does offer better readability over Feld Hell. Click on the link below to see an on-air and example of how the modes compared. FSK-Hell is available in IZ8BLY's Hellschreiber (FM-Hell), DM780, MixW and Multipsk. http://www37.zippyshare.com/v/71092013/file.html Tony -K2MO http://www.obriensweb.com/digispotter.html Chat, Skeds, and Spots all in one (resize to suit) Facebook= http://www.facebook.com/pages/digitalradio/123270301037522 Yahoo! Groups Links
