Pat Dyer
   5315 Silvertip Drive
  San Antonio, TX 78228
Deadline: 12th of month

                           APRIL 1975

 Hank Holbrook, 7211 Chestnut St., Chevy Chase, MD 20015  GMT; QSLed

   8-2: 0059, WR 8028  157 apx  Poplar Island, MD (Maryland Clipper;
                                Freighter; 25 watts)
    17: 0356, KEI 863  155.845  Hauppauge, NY (county police; 200 watts)
        0445, KGA 819  155.130  Wilmington, DE (police)
   9-1: 2232, N6616R   122.9    Edgewood Arsenal, MD (Edgewood Arsenal
                                Army Flying Club;Cessna 172;1200';5 w)
 10-26: 1537, N1076W   119.7    ov Ft.Meade,MD (Associated Insurers,
                                Inc.;Beechcraft B-55, 2-eng,6-seat)
 11-30: 2100, N282P    119.7    3 mi s Ches.Bay Br.,MD(Frank S. Bissell;
                                Piper PA-30 Twin Comanche;2500'; 10 w)
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 My loggings now. Hallicrafters SX-62 with two 30' long-wire antennas
 at 12' (ne-sw and nw-se runs); F2 unless noted with daily peak MUF
 (US if 31 or more) given if over 30. New underlined; GMT used

 2-13: 1650, 30.58         19: 0647, KMA 829 (Es)  3-1: 2020, 35.28
   14: 1630, KOE 257 (Es)      0659, KOE 257 (Es)    7: 1652, KAI 927 (Es)
       1639, KME 438 (Es)      1645, KSC 645 (Es)       1657, KAQ 606 (Es)
       1646, KDN 407 (Es)      1702, KAI 927 (Es)       1702, KQD 313 (Es)
       1658, L Ang-b (Es)      1716, KSJ 815 (Es)       1746, KFL 943 (Es)
       1659, KAQ 6O6 (Es)      1818, KIQ 999 (Es)    8: 1627, KOE 257 (Es)
       1727, KMA 829 (Es)  20: 1935, F.Falls (Es)             L Ang-a (Es)
       2033, 35.28             1952, KAQ 606 (Es)   10: 2050, L Ang-a (Es)
   15: 1720, 35.28         21: 1715, 32.29              2057, KME 438 (Es)
   16: 1825, 40.000        23: 2030, 35.22          11: 2110, 32.000
       2037, 31 + US       24: 1840, hi 35          12: 1830, 35.28

 add:  2-8: 1927, KAA 201  42.06  Macon, MO (state police)
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 KAI 927  35.34  Denver, CO         KOE 257  35.22  Phoenix, AZ
 KAQ 606  35.58  Denver, CO         KQD 313  35.50  Dayton, OH
 KDN 407  35.22  Co.Spgs, CO        KSC 645  35.58  Chicago, IL
 KFL 943  35.58  Las Vegas, NV **   KSJ 815  35.22  Fort Wayne, IN
 KIQ 999  35.34  Mobile, AL            -     35.54  Fergus Falls, MN-mp
 KMA 829  35.58  San Diego, CA         -   a-35.38  Los Angeles, CA-mp
 KME 438  35.22  Orange, CA            -   b-35.46  Los Angeles, CA-mp

 mp-mobile phone; rest are tone (A2) pagers, except ** tone message
 with voice ID
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 Feb 1975  10.7-cm solar flux and Fredericksburg (VA) A-Index

  1:  73 20     8:  81  8     15:  72 16     22:  70  5    Avg: 74.1
  2:  73  9     9:  79  6     16:  73 19     23:  70 27   (the lowest
  3:  77 11    10:  77 21     17:  71 14     24:  70 12    yet for the
  4:  78  7    11:  77 19     18:  70 13     25:  71 16    Cycle 20
  5:  79 14    12:  77 28     19:  70 12     26:  70 10    decline)
  6:  83  8    13:  76 18     20:  71  6     27:  71  4
  7:  82  9    14:  74 22     21:  70  6     28:  70 10

 March CQ Magazine has a good article by George Jacobs showing how these
 can be put to use for propagation predictions.

 As seen above, the low solar levels have had a devastating effect on
 the F2 MUF's in the VHF band. One only has to compare this with the
 loggings in the VUD for 1971-74.

                                 73,        WA5IYX