Pat Dyer
     P.O. Box 27376
                                               San Antonio, TX 78227
                                               Deadline: 12th of month

                             JULY 1972

Ferdinand Dombrowski, Box 5001, Milwaukee, WI 53204 reports that the
Milwaukee weather station, KEC 60, 162.4 MHz (since Chicago is 162.55)
was on with tests as of May 10th.
         
Hank Holbrook, 7211 Chestnut, Chevy Chase, MD 20015 with a few more
QSLed aircraft, GMT used.

4-23: 1323, N2442S  128.3  over Georgetown, DE (Roland V. Beetham;
                           Cessna 337B, 2-engine, 6-seat; 10 watts)
  30: 1304, N1911T  122.8  (Bay Bridge Airport, Inc.; Piper Cherokee
                           PA28-140, single-engine, 2-seat)
 5-6: 1448, N7045Y  119.7  near MD (Cominic A. Piracci, Jr.; Piper
                           Comanche PA-29, twin-engine, 4-seat)
      2157, PH-DEA  128.3  25 minutes from NY to Chicago (KLM, Dutch
                           Royal Airlines, DC-8-63)
  13: 1527, N2138R  122.8  MD (Vachel A. Downes, Jr.; Piper Cherokee
                           PA-28-180; single-engine, 4-seat)

Glenn Hauser, P.O.B. 62, Von Ormy, TX 78073 is back with 30-50 MHz
using an Allied Astronaut-6; GMT used.

5-27: 2311, KIG 300        28: 2225, KQD 313       29: 1416, KFJ 891
      2400  KIY 503                  KIQ 999           1450, KQD 313
------------------------------------------------------------------------
Now, my loggings. 30-50 MHz Allied A-2586 with whip and 30-ft on indoor
random wire antenna; hi-band, Wards 62-1 with 2-ft whip. All Es unless
noted otherwise. CST used. New underlined; 50-MHz Es deleted.

5-13: 0200, KFL 936        23: 1035, KIY 508       31: 1945, OK city
      0849, KSD 326            1937, KSD 326                 KIY 508
      0935, KAH 661        24: 1805, L Beach      6-1: 0835, KIG 300
      0945, KSC 645            1958, KOE 257           0838, KIY 508
      0953, KDN 402        25: 2004, KSC 645           1655, Pittsburgh
      1131, KSJ 815        26: 1802, KIG 300           1658, KFL 936
      1701, OK City            2013, OK City        4: 0817, KIY 508
  14: 1032, KSD 326              -   KSC 645           0825, KQC 881
  15: 0020, L Beach        29: 0135, KSC 645        5: 1750, KDN 407
  18: 0040, KHB 41 (tr)        0137, KFL 936           2350, KHB 41 (tr)
      0933, KIM 905            0922, KIG 300        7: 0930, OK City
  19: 0040, KHB 41 (tr)        1815, OK City           1202, KIG 300
  21: 1013, KIY 508            1825, KQC 881           1805, KSD 326
      1050, OK City        30: 0040, KQD 607           2011, KIY 508
      1101, KSJ 815            1015, KIG 300           2050, KFL 936
      1735, L Beach            1724, KSD 326       10: 0915, KQD 607
      2125, KHB 41 (tr)        1725, Eau Claire    11: 0942, KIY 508
  22: 1120, KIY 508            2109, OK City

My loggings are rather skimpy considering the amount of Es that has been
around this season so far. However, there have been many days of 50-MHz
double-hop Es as well as numerous openings clear thru the FM broadcast
band that brought in unidentified VOR's well above 108 MHz. Hopefully
Hank managed to get some of them. With conditions like that, much
careful monitoring of the 30-50 MHz region seems, in a word, silly.
VHF RADIO                                                    JULY 1972
         
KAH 661  35.22  Minneapolis, MN     KQC 881  43.58  Cleveland, OH
KDN 402  35.54  Omaha, NE           KQD 313  35.50  Dayton, OH
KDN 407  35.22  Co. Spgs., CO       KQD 607  35.50  Grand Rapids, MI
KFJ 891  35 /   Columbus, OH        KSC 645  35.58  Chicago, IL
KHB 41  162.55  C. Christi, TX-w    KSD 326  35.58  Indianapolis, IN
KIG 300  43.58  Atlanta. GA         KSJ 815  35.22  Fort Wayne, IN
KIM 905  35.22  Charlotte, NC          -     35.42  Eau Claire, WI-mp
KIQ 999  35.34  Mobile, AL             -     35.58  Long Beach, CA
KIY 508  35.22  Orlando, FL            -     35.58  OK City, OK
KOE 257  43.58  Phoenix, AZ            -     43.58  Pittsburgh, PA

mp-mobile phone; w-weather; rest are pagers. A2 ID's used by KDN 402,
KDN 407, KFJ 891, KFL 936, KIQ 999, KQD 313, KQD 607, KSC 645, KSD 326,
and KSJ 815.
------------------------------------------------------------------------
The following table was run in my columns of August 1970 and July 1971.
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 that 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.

To extend coverage of the chart to frequencies not listed, simply
take the number from the 100 MHz column tor the desired distance,
divide by 100, and multiply the desired frequency by it. (e.g.,
75 MHz at 600 miles means 1.38 x 75). The numbers in that column are
the ratios of the secants of the angles of incidence shown below.




                                   73, Pat    WA5IYX/5