Chris, The "problem" with random or non-shower meteors is that the received signals don't last very long.
A typical 6 meter signal reflected from and underdense meteor trail may last 1/2 second. In theory, the same meteor reflection should last 1.5 seconds on 10 meters. Generally speaking, the longer bursts make things easier on 10 meters, but I'm not sure if Olivia would have enough time to decode in such a short amount of time. We do have WSJT modes that are specifically for meteor scatter and they work wonders. Personally, I get more fun out of HSCW, but it seems to be fading out these days. 73, Tony KT2Q ----- Original Message ----- From: "Chris Gerber" <[EMAIL PROTECTED]> To: <digitalradio@yahoogroups.com> Sent: Saturday, September 03, 2005 6:01 PM Subject: Re: [digitalradio] Digita model MS on HF / a bit off-topic > Well why not try Olivia. So far we have made the best contacts with > weakest signals on Dx > > Chris HB9BDM > > KT2Q schrieb: > >> All: >> >> I know this is a bit off-topic, and this is not a meteor scatter >> reflector, >> but it does have to do with digital modes. Hopefully, my ramblings won't >> hurt anyone : ). >> >> For the past few months, I've been experimenting with radio meteors using >> an internet remote base to monitor and record reflected signals. >> >> By transmitting a steady RF tone (or digital signal) and recording >> what the >> internet remote receiver hears, I can capture my own signals reflected by >> meteor trails. >> >> It's similar to an oblique ionosonde, but instead of probing the >> ionosphere >> for signals, I'm probing for meteor reflections. >> >> I have recordings if anyone would like to hear them. W4MQ's remote >> base was >> used as the remote receiver and is located about 260 miles from my QTH. >> >> At first, I was just curious to see how the radio meteor rate, signal >> duration and signal strength increased as frequency decreased. >> >> As expected, the frequency dependance theory became pretty obvious after >> just a few tests. As I lowered the test frequency from 6 meters to 15 >> meters, the meteor rate and signal duration went up as did signal >> strength. >> >> Testing on 21 through 28Mhz was done well after local sundown (10:00PM to >> 05:00AM) to make sure I wasn't propagating signals via the ionosphere. >> >> The recordings were taken during peak meteor activity (June/August), >> but I >> was still surprised at how consistent 24 and 28Mhz reflections were >> compared >> to 50Mhz. >> >> Even now, in early September, reflection rate is high on 10/12 meters and >> it's rare not to hear meteor reflections between W4MQ and my QTH. >> >> Now to my point.. >> >> Since we're near the bottom of the solar cycle, and because there's >> little >> propagation on 10m (other than the occasional Es opening) I thought it >> would >> be interesting to try MS digital modes like MS Hellschreiber or even >> HSCW on >> 10 meters. >> >> With the higher duration reflections on 10 meters, highspeed CW works >> well >> at low keying rates (80 to 500wpm) and MS Hell works well too, but >> it's less >> sensitive. >> >> The WSJT mode JT6M is a bit slow for MS, but it does work well and is >> very >> sensitive. It works fine as long as you can get reasonable reflections >> (about 1 second pings). >> >> The faster WSJT mode FSK441 (developed VHF MS) is too wide for 10m. >> I'm told >> it can be used in the phone portion, but I have my doubts and would >> have to >> find out if it's legal. >> >> The JT6M mode is much narrower (about 700hz) and has a low baud rate, >> but I >> have't looked into whether this mode would be acceptable on 10 meters. >> >> For starters, I'd like to sked with someone who is within 500 to 800 >> miles >> of my QTH (FN30JV). It would be great to work a live station instead of >> decoding my own signals : ). >> >> The WSJT mode JT6M, MS Hell or HSCW will do. >> WSJT - http://pulsar.princeton.edu/~joe/K1JT/ >> <http://pulsar.princeton.edu/%7Ejoe/K1JT/> >> HSCW - http://ham2.cc.fer.hr/9a4gl/ >> >> I have a copy of Nino's Hellschreiber that includes MS Hell. Can't >> seem to >> find it on the web. >> >> I've worked plenty of MS on 6 meters over the years, but never on 10. I >> thought this might spark some interest in 10 meter digtial comms till the >> cycle bounces back. >> >> 73, Tony KT2Q >> >> >> >> >> >> The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ >> More info at http:///www.obriensweb.com >> >> >> >> >> SPONSORED LINKS >> Hobby and craft supply >> <http://groups.yahoo.com/gads?t=ms&k=Hobby+and+craft+supply&w1=Hobby+and+craft+supply&w2=Craft+hobby&w3=Hobbies+and+crafts&w4=Ham+radio&c=4&s=84&.sig=Sz5ebNg-ZsVyHTzaR4PnAg> >> Craft hobby >> <http://groups.yahoo.com/gads?t=ms&k=Craft+hobby&w1=Hobby+and+craft+supply&w2=Craft+hobby&w3=Hobbies+and+crafts&w4=Ham+radio&c=4&s=84&.sig=_8V4kQCK4PEN_MzUUBx-hQ> >> Hobbies and crafts >> <http://groups.yahoo.com/gads?t=ms&k=Hobbies+and+crafts&w1=Hobby+and+craft+supply&w2=Craft+hobby&w3=Hobbies+and+crafts&w4=Ham+radio&c=4&s=84&.sig=J-__6L1W_lZQ58dekNdHLA> >> >> Ham radio >> <http://groups.yahoo.com/gads?t=ms&k=Ham+radio&w1=Hobby+and+craft+supply&w2=Craft+hobby&w3=Hobbies+and+crafts&w4=Ham+radio&c=4&s=84&.sig=OzrEr-gq6h7guAFs73WsoQ> >> >> >> >> ------------------------------------------------------------------------ >> YAHOO! 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