ad: AC6LA-1

Short or Long Path???

Discussion in 'General Technical Questions and Answers' started by VO1CRM, Mar 16, 2007.

Thread Status:
Not open for further replies.
  1. VO1CRM

    VO1CRM Ham Member

    Hello Everyone,
    I am fairly new to amateur radio. I only have my license about 3 months. My QTH is on the island of Newfoundland in eastern Canada. I have a question regarding short and long path propagation. I have been listening to many stations and always hear them comment about using the short path in the mornings and long path at other times of day or vice versa. How do you know when to use one path and not the other? I have been using a windom antenna but I am upgrading to a yagi and I am also a DX chaser so I figured this would be of great importance. Can anybody help me out. Thanks!! [​IMG]

    Chris
     
  2. K1VSK

    K1VSK Ham Member

    It will bne self-evident once you put up the beam. There are some general conditions from the east coast - 20m LP to VK/ZL and infrequently southern Africa and JA (oposite headings) in the afternoon, Asia and Europe LP in the a.m. I maintained a separate log of all my Lp contacts over the years and found the above to be fairly consistent although masked by simultaneous SP conditions as well such as european openings easily missed. It's always a more interesting way of working DX.

    I wouldn't be concerned with the other bands at this point in the solar cycle
     
  3. NM5TF

    NM5TF Ham Member

    Hi Chris & welcome to the wonderful world of HF [​IMG]

    don't know how early you get up, but Volker ZS1Y is on
    almost every morning on 20M...around 0700 Mountain time,
    so adjust your time accordingly..

    listen around 14.17-14.25 or so....

    because of his QTH location, with a large hill between
    his location & North America, he is forced to work us using the long path exclusively...

    I worked him a couple of weeks ago using my old boat-anchor running 100W into a low dipole..

    15K miles from my QTH....it can be done [​IMG] [​IMG]

    gud lck es let us know how you do...

    p.s. Volker is one of those rare DX stations that likes to ragchew...no QRZ, yer 5/9,QRZ there [​IMG]
     
  4. KL7AJ

    KL7AJ Ham Member

    You can't conclusively prove if it's long path or short path without a beam...but there are lots of other hints...one of which is following the gray line...it will tell you the most LIKELY path.

    Hmm...actually, I partially lied....even a BEAM won't ABSOLUTELY give you the direction...especially if you live up here, where the ionospher is tilted. But in any NORMAL place, it's a good method...HI

    eric
     
  5. NZ3M

    NZ3M XML Subscriber

    An indicator that both paths are present is an "echo" sound on the signal. It's not echo boxes like some people presume.
     
  6. AG3Y

    AG3Y Ham Member

    Long path often has a "watery" or "fluttery" quality to it that a short path signal usually does not exhibit. Once you have heard it, you will have no problem identifying the sound.

    A friend of mine was once asked what the longest distance qso he ever had, was. His answer, "a station about a hundred miles away, on 20 meters. His antenna was pointed north, and mine was pointed south, and we figured that our signals traveled around the earth the long way ( long path ) making our DX just 100 miles short of the total distance around the Earth."

    Good story! I cannot vouch for the truth of it, but it is entirely possible!

    73, Jim
     
  7. AG3Y

    AG3Y Ham Member

    When the "Russian Woodpecker" was putting out its pulses on 80 and 160 meters, you could take a beam and point toward the source of the transmission and distinctly hear the pulses as sharp and distinct. However, turn the antenna in the other direction, and you could hear the reflections coming back from the other beam heading, with that echo and "watery - fluttery" sound described in the previous posts. A great illustration of short vs. long path propagation!
     
  8. KC0PKA

    KC0PKA Ham Member

    DX is cool!!!!!!!!!! [​IMG]
     
  9. N5TJD

    N5TJD Ham Member

    Also a watery fluttery signal can be evident when you make a contact over the pole. A thick Asiatic Russian accent mixed with polar flutter makes for an interesting time trying to understand what is being said. [​IMG]

    Backscatter is another way stations can communicate when they are too close for normal prop but too far for tropospheric prop.

    HF is a whole lot of fun. You never know where your signal will end up....or how it will get there. I had a conversation with a guy in Brazil and got a QSL card from him, then not long after I got an SWL card from a guy in Moscow who had heard our QSO...
     
Thread Status:
Not open for further replies.

Share This Page