White Dot, 43 bytes
White Dot, 43 bytesJuly 1971 VUD VHF
Radio Column header, 1,533 bytes                                                               Pat Dyer
                       Office of Telecommunications
           Institute for Telecommunication Sciences
                           Boulder, Colorado  80302   
                            Deadline: 12th of month

                                  JULY 1971

     Please note the change in my address. I am currently on a temporary
     appointment at ITS to prepare data on VHF Es for the CCIR (Consul-
     tative Committee on Ionospheric Radio). At present it looks like I'll
     be here until mid-September. My apologies to  those who sent in a
     report before the deadline which has not been forwarded yet.

     Hank Holbrook, 7211 Chestnut Street, Chevy Chase, MD 20015 with more
     QSLed DX from the Fair Haven, MD cottage; GMT used.

     10-31: 1703, KOH 209  39.82  Pocatello, ID (sheriff)
     12-5:  1713, KOA 362  39.18  Douglas, AZ (police)
     12-29: 1858, KQC 584  39.82  Grand Traverse, MI (police)

     Morrie S. Goldman, 5815 North Christiana Avenue, Chicago, IL 60645     
     had daily Es in 30-50 MHz from May 21 thru 31, using a Hallicrafters
     S-94 and Allied A-2586 (the latter being found the more sensitive but
     less selective receiver).

     most commonly heard: Oklahoma City: KCC 482; KIY 508

     Morrie reports also that KSC 645, 35.58, in Chicago is now using tone
     signals rather than voice paging messages.

     Richard T. Colgan, B-9-C College View, College Station, TX 77840 had
     Es many days but there were so many signals on any one channel that
     ID's were hard to come by. Some good trop was also noted.

     5-16: KHB 33  162.55  Brownsville, TX (weather)
       18: KIB 486  45.06  Lake City, FL (state police)
       21: KAA 270  42.06  Poplar Bluff, MO (state police)
       26: KGC 343  35.2   Philadelphia, PA (pager)
       30:    -     42.38  Williston, ND (police)
       31: KOE 257  43.58  Phoenix, AZ (pager)
.................................................................................
       Now my loggings, Allied A-2586 with built-in whip and 30-feet of
       indoor random wire. Hi-Band, Wards 62-1 with 2-foot whip antenna.
       CST used, new underlined, Es unless noted; 50-MHz Es deleted.

       5-15: 1453, Long Beach    20: 1914, KIM 905        22: 0754, KSC 644
             1459, KOE 257           2225, KFL 936            1120, KIM 905
             2115, KHB 33 (tr)   21: 0025, KMD 342            1218, KSC 864
         16: 1120, KIM 905           0737, Long Beach         1327, KIG 300
         17: 1742, KMD 342           0750, KIM 905            2026, KOE 257
         18: 0035, KHB 41 (tr)       0802, KIG 300        23: 0027, KFL 936
             0852, KOE 257           0805, KOE 257            1237, Long B.
                   Long Beach        0837, KAI 927        24: 0945, KIY 508
             1015, KIY 508           1130, KSC 644            1134, KIM 905
             1304, KIN 645           1208, KIY 508            1818, KIG 300
             1420, KIQ 999           1302, KIN 645            2000, KIN 645
             1615, Mexico City       1933, KQD 607            2020, KSC 644
         19: 1633, KIY 508       22: 0700, KFJ 991        25: 0900, KIN 645
             1945, KIN 645           0712, KQD 303            1119, KIY 508
             2120, KIM 905           0725, KIY 508            1500, KOE 257

VHF RADIO Page 2 JULY 1971 25: 1500, KFL 936 28: 2103, KIM 905 1: 2228, KHB 41 (tr) 2220, KIM 905 29: 1005, KIM 905 2: 1155, KIY 508 26: 0935, KOE 257 1133, KSC 864 1618, Long Beach 1830, KSC 644 30: 0705, KIM 905 3: 1825, KSC 864 27: 0847, KIM 905 1047, KSC 864 KQD 609 0905, KQC 881 1550, KIY 508 2034, OK City 1705, KIY 508 31: 0857, KIM 905 4: 1238, KDN 402 28: 0850, KIY 508 0859, KOE 257 2009, KOE 257 1829, KSC 864 1203, KIY 508 7: 1103, KIM 905 1830, KDN 402 1406, Long Beach 1201, KIG 300 1923, KQD 609 J 1: 1100, KIM 905 12: 1438, KKV 690 1936, KQD 303 1800, Long Beach 1447, KIQ 999 (add M23: 2017, KIM 905) (J 12 loggings made from Boulder, CO with 20' indoor random wire antenna on ground floor of 3-story building) ............................................................................... KAI 927 35 / KMD 342 35.22 Fresno, CA KCC 482 35.22 Concord, NH KQC 881 43.58 Cleveland, OH KDN 402 35.54 Omaha, NE KQD 303 35.22 Detroit, MI KHB 41 162.55 C. Corpus, TX-w KSC 644 43.58 Chicago, IL KIG 300 43.58 Atlanta, GA KSC 864 35.58 Peoria, IL KIM 905 35.22 Charlotte, NC - 35.58 Long Beach, CA KIN 645 35.22 Miami, FL - 43.57 Mexico City KIY 508 35.22 Orlando, FL - 35.58 Oklahoma City, OK KKV 690 35.62 Houston, TX A2 tone ID by: KAI 927, KDN 402, KFL 936, KFJ 991, KIN 645, KIQ 999 KKV 690, KQD 607, and KQD 609; all pagers except w-weather. ............................................................................... ............................................................................... The following table was run in this column last August. MUF vs. skip distances for a non-tilted Es patch at 105 km height. miles 35.22 35.58 43.22 43.58 60.0 100 1400 35.22 35.58 43.22 43.58 60.0 100 1300 35.36 35.72 43.39 43.75 60.2 100.4 1200 35.75 36.11 43.87 44.23 60.9 101.5 1100 36.38 36.75 44.65 45.02 62.0 103.3 1000 37.40 37.79 45.90 46.28 63.7 106.2 900 38.92 39.32 47.76 48.16 66.3 110.5 800 41.07 41.49 50.39 50.81 70.0 116.6 700 44.12 44.62 54.12 54.65 75.2 125.4 600 48.60 49.10 59.64 60.14 82.8 138.0 500 55.15 55.72 67.68 68.25 94.0 156.6 400 65.12 65.78 79.91 80.56 110.9 184.9 300 81.15 81.98 99.58 100.4 138.2 230.4 200 108.7 109.8 133.4 134.5 185.2 308.7 150 129.6 131.0 159.1 160.4 220.9 368.1 100 155.8 157.4 191.2 192.8 265.4 442.3 50 183.4 185.3 225.0 226.9 312.4 520.7 To use the chart, suppose you have 43.58 MHz skip down to 600 miles, this means the Es should skip 60.14 MHz at 1420 miles (the maximum one-hop distance for the given cloud height). Remember the Es must be at the midpoint of any path, so getting short skip on 43 MHz will not always give you TV Es at the same time. 73, Pat WA5IYX/Ø

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