As I mentioned above, if the HF bands were open so you could make a connection between San Diego and Texas, I simply don't understand why a 200 - 300 mile connection could not have been established on either 80m or 40m. I've been a ham for a long time, and understand propagation on these two bands. With NVIS, the mountain range should make no difference.
I could understand not making a direct connection if only 30m or 20m was tried. One of these bands was obviously used if a connection to Texas was made during the daytime. If these were the only bands tried, it is obvious why a direct connection wasn't made. And, if nothing else, a connection from San Diego to Texas on 20m would only be good for a very few hours each day. Not exactly, what I would call good reliable service. There just isn't enough info here for me to to accept that the conclusion 'hurrah, Winlink was the only mode that would work on HF' is correct. I get the sneaking suspicion that not enough preparation was done to insure a reliable NVIS 'direct' connection on 80m or 40m could be made, consequently, the "All other Modes Failed to Connect" statement. Jim WA0LYK --- In [email protected], "Dr. Howard S. White" <[EMAIL PROTECTED]> wrote: > > All other Modes (including several Weak Signal Digital modes) Failed to Connect the San Diego EOC to the Imperial County EOC during the SET. > > Doc: > > You were so hung up in your theoretical analysis that you missed the point.... > > Basically there was no HF/VHF/UHF propagation path directly between the two EOC's during the test. Plus the path is difficult at best of times due to intervening mountain ranges. They had hoped HF Sideband and HF Digital would bridge the gap...but the propagation gods were against them... > > Winlink was not planned to be included in the SET. Winlink was tried as a total afterthought (because like you the EOC managers were very skeptical of Winlink and strongly resisted its installation) when all other modes failed..... I have been lead to believe that the EOC Managers were hoping to use this as an opportunity to prove that Winlink would also be useless in the SET Scenario. > > Winlink worked by connecting on HF through a node over a thousand miles away in Texas that was able to AUTOMATICALLY relay the messages to the Imperial County EOC. > > As I was out in the field at the time, and do not have first hand knowledge, but I believe that Imperial County EOC was connecting through a different Winlink Node. > > Frankly.. the EOC managers were shocked that Winlink was the only mode that worked when all else failed...as they had expected Winlink to fail... and frankly the real world success has made a number of them into Winlink converts. > > Doc: > > I loved your theoretical analysis of the situation.. > > but the Bottom Line Real World results in the Simulated Emergency Test which was designed by the EOC Managers to simulate the effects of a 7.9 earthquake as realistically as they possibly could... > > ... showed that Winlink Worked... > __________________________________________________________ > Howard S. White Ph.D. P. Eng., VE3GFW/K6 ex-AE6SM KY6LA > Website: www.ky6la.com > "No Good Deed Goes UnpuAmanished" > "Ham Antennas Save Lives - Katrina, 2003 San Diego Fires, 911" Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
