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.
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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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