Mar 1975 VUD VHF
 Utility DX Header, 3,299 bytes  
                                 MARCH 1975

     Paul E. Petosky, 712 Brook St., Munising, MI 49862 sends word that
     KIG 66 on 162.55 MHz would be active as of 1-9-75 with 330 watts out
     of Marquette with an expected coverage radius of 50 miles.

     Robert Hartmann, 16 Marvin St., Mayville, NY 14757  GMT

     1-13: 2304,   -     121.--  nr Buffalo, NY (American 309; 727)
           2306,   -     134.--  nr Cleveland, OH (United 712)
           2307,   -     133.--  nr Toronto, Ontario, Canada (Air Can. 734)
           2308, N2146P  130.--  nr Cleveland, OH
           2310,   -     130.--  nr Cleveland, OH (Jetstar 1620)
           2312,   -     133.--  nr Cleveland, OH (American S.; 707)
         
     Hank Holbrook, 7211 Chestnut St., Chevy Chase, MD 20015  QSLed; GMT

      7-25: 0141, KAJ 726   37.10  Indianola, IA (police)
            0150, K-- ---   37.10  Belton, AR (police)
     10-18: 2043, N7959P   119.7   11 mi n Balt.(Mr, John C. Neamtz; Piper
                                   PA-24 Comanche 250; single-engine;4-seat)
        26: 1441, N1614Q   119.7   nw Annapolis(Hop Flight,Inc.;Cessna 150)
      11-2: 1701, N71884   119.7   40 mi ne Balt,(Edward G. Gordon Co., Inc.;
                                   Cessna 182, 1-engine, 4-seat; 6500 feet)
            1730, N9629L   119.7   ov Ches.Bay Br.(Bay Land Aviation, Inc.;
                                   Grumman American; 1-eng, 2-seat trainer)
         3: 1532, N7893    118.1   DC ov Blue Ridge Mountains (TWA Flt 183;
                                   Boeing 727-31; 25 watts)
            1704, N7937M   119.7   ov Lee Field, Annapolis (Air Services,
                                   Inc.; Beech Bonanza; 1-engine; 5 watts)
     ------------------------------------------------------------------------
     Now, my loggings. Hallicrafters SX-62 with 2 long-wires (30' at 12' with
     ne-sw and nw-se runs); all F2 mode (* backscatter) unless noted other-
     wise, with daily peak MUF listed (for US if near or over 31 MHz); GMT
     used; new underlined

     1-13: 1810, 34.89          1: 2320, KSF 947 (Es)  8: 1711, KQI 316 (Es)
       14: 2320, KFL 936 (Es)      2328, KSB 423 (Es)     1714, KSC 645 (Es)
           1840, 32.000            2335, KAF 245 (Es)     2000, KQC 877 (Es)
       15: 2040, 30.02          2: 1910, KMA 829 (Es)  9: 1827, KAI 927 (Es)
       16: 1930, 30.22             2035, 32.000           1940, 36.45
       17: 1925, 35.28          4: 0309, KIQ 999 (Es) 10: 1845, 40.000
       19: 1618, KQC 884 (Es)   5: 1945, 33.17            1925, 31 + US
       20: 2220, KQD 607 (Es)   6: 1700, 33.32            2003, KKV 690 *
       21: 0436, KFL 936 (Es)   7: 0213, KAI 927 (Es) 11: 1940, Los Ang (Es)
           1729, KSJ 815 (Es)      0324, KDN 407 (Es)     2002, KMA 829 (Es)
       27: 0051, KFL 943 (Es)      1717, 38.50            2100, 41.000
      2-1: 1615, 33.00             1750, KQD 313 (Es) 12: 1625, KIE 953 (Es)
           2258, KAA 958 (Es)      1823, KFJ 891 (Es)     2005, 31 + US
           2314, KSB 229 (Es)      1945, 30.80 US         2010, 41.000
           2317, KSA 775 (Es)   8: 0109, KSC 645 (Es)     2115, BBC
     -------------------------------------------------------------------------
     KAA 958  42.06  Rolla, MO-sp            KIQ 999  35.34  Mobile. AL
     KAF 245  43.58  Kansas City, MO         KKV 690  35.62  Houston, TX
     KAI 927  35.34  Denver, CO              KMA 829  35.58  San Diego, CA
     KDN 407  35.22  Co. Springs, CO         KQC 877  35 +   Cincinnati, OH
     KFL 936  35.58  (west)                  KQC 884  35 +   Detroit, MI
     KFL 943  35.58  Las Vegas, NV **        KQD 313  35.50  Dayton, OH
     KFJ 891  35 +   Columbus, OH            KQD 607  35.50  Grand Rapids, MI
     KIE 953  35.58  Atlanta, GA             KQI 316  33 +   Cleveland, OH-f

VHF UTILITY DX MARCH 1975 KSA 775 42 + Macomb, IL-sp KSF 947 42 + Pecatonica, IL-sp KSB 229 42 + Rock Island, IL-sp KSJ 815 35.22 Fort Wayne, IN KSB 423 42.38 Minocqua, WI-sp - 35.46 Los Angeles, CA-mp KSC 645 35.58 Chicago, IL BBC 30.52 Ascension Is.-ha f-fire; mp-mobile phone; sp-state police; ha-h.f. harmonic; rest are A2 tone pagers, except ** tone message and voice ID ------------------------------------------------------------------------ Jan 1975 Ottawa 10.7-cm solar flux and Fredericksburg (VA) A-Index 1: 81 5 9: 83 8 17: 77 25 25: 73 5 Avg.: 77.5 2: 78 2 10: 83 6 18: 78 19 26: 73 4 3: 80 6 11: 84 3 19: 77 11 27: 72 11 4: 77 16 12: 85 4 20: 76 9 28: 73 9 5: 76 18 13: 83 24 21: 77 6 29: 73 7 6: 76 14 14: 80 24 22: 76 5 30: 73 7 7: 78 30 15: 80 11 23: 75 8 31: 72 17 8: 80 25 16: 79 16 24: 73 10 ------------------------------------------------------------------------ Transequatorial scatter (TE) - this subject was meant to have been discussed about a year ago when I ran the mini-series of items on F2 VHF DX propagation modes. TE was discovered by radio amateurs in the late 1940's (Cycle 18) and was intensively studied as part of the IGY (Cycle 19). It was found to be associated with the ionogram phenomenon known as "spread F", wherein the echo is spread out in duration to several times the length of the original pulse. This implys some sort of scattering by irregularities in the F-region. These irregularities form at or after sundown near the geomagnetic equator. On oblique paths the most pronounced effect on the signal is the rapid flutter (10 Hz or more, but not as bad as auroral flutter). It has been found that the TE may well affect frequencies as high as 1.5 times the daytime F2 peak MUF in the region. During sunspot peaks TE may last at 50-MHz for a considerable time past local midnight. The best paths are those that cross the geomagnetic equator at almost right angles (e.g., Central America to South America, Japan to Austral- ia etc.). The best time of year is near the equinoxes (Mar and Sept). With the Mar-April period there is often enough Es around to permit paths to link up from the southern US to an already ongoing TE event in Central America. However, North America is likely one of the poorest places for TE as the geomagnetic equator dips so far south over South America (well under the geographic equator) compared to other locales (geomagnetic equator north of geographic from about Hawaii to North Africa). Unlike normal F2 modes, TE may not exhibit obvious effects on the lower frequencies, for example, 50-MHz "open" when 35-MHz apparently not. Thus there is not a simple, reliable way to see a TE "MUF". (Although Bob Cooper found that the flutter fading in the Virgin Islands was likely due to a very rapid swing in the MUF of the path). It has been suggested that one of the reasons of a lack of low-VHF TV channels in southern South America was because of the mutual CCI that would occur with the Venezuelans etc with the almost nightly TE down there many months of the year. 73, Pat Signature, 1,689 bytes WA5IYX


Prior
Next
VUD Index

Page last modified March 14, 1999