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Monday, July 9, 2018

The Good Old Days Of Mediumwave DXing

The blog has been lying low for quite awhile. Time allowing, I'd like to present some new ideas.

I occasionally hear talk of the "good old days" of mediumwave DXing, usually referring to back in the 1960s and earlier. The talk is of nightly cross-country DX, of hearing Los Angeles on the east coast, of foreign stations as a regular occurrence. Usually it gets around to a discussion of how fewer stations were on the mediumwave band in those days. I always wondered what a comparison would look like.

Recently, I came across a 1941 Stephenson's Radio Bulletin on a great site called American Radio History:

https://www.americanradiohistory.com/index.htm

They have scanned many articles and magazines from all eras of radio history, back to the 1920s.

I decided to tabulate the 1941 list of mediumwave stations against today's 2108 list and see what it looks like. This has been a project idea I've been thinking about for a long time. I just haven't been able to get a station list with the data readably usable, so I decided to write some code to extract it.

Presented below is the mediumwave radio world of 1941 compared to today's 2018. The 2018 US station counts are all nighttime stations only, at current nighttime power levels. The 1941 station data includes all stations from that year (tabulated in January, 1941). Less than 10% are restricted in their nighttime use of power , a few are daytimers only. That just means there would be even less interference than what can be extrapolated from the table.

So, were these the good old days? I would say so. In 1941 we only had about 31% of the RF wattage flying around at night. There were a total of 833 stations transmitting at night, as opposed to the approximately 4058 transmitting at night tonight. What the table doesn't show is that the stations transmitting at night in 1941 generally transmitted at a higher power than those of today, Fewer stations at higher powers = better DX.

 -----1941-2018 DIFFERENCES ON THE MEDIUM WAVES-----

 530  (2018) #Stations =   0    TotalWatts =       0
      (1941) #Stations =   0    TotalWatts =       0

 540  (2018) #Stations =  20    TotalWatts =  49,620
      (1941) #Stations =   0    TotalWatts =       0

 550  (2018) #Stations =  24    TotalWatts =  77,923
      (1941) #Stations =   9    TotalWatts =  33,000

 560  (2018) #Stations =  23    TotalWatts =  60,320
      (1941) #Stations =   9    TotalWatts =  33,000

 570  (2018) #Stations =  19    TotalWatts =  53,379
      (1941) #Stations =   9    TotalWatts =  24,250

 580  (2018) #Stations =  24    TotalWatts =  97,298
      (1941) #Stations =   7    TotalWatts =  31,000

 590  (2018) #Stations =  27    TotalWatts =  61,390
      (1941) #Stations =   5    TotalWatts =  17,000

 600  (2018) #Stations =  23    TotalWatts =  55,021
      (1941) #Stations =   5    TotalWatts =  17,000

 610  (2018) #Stations =  27    TotalWatts =  67,795
      (1941) #Stations =   7    TotalWatts =  26,500

 620  (2018) #Stations =  23    TotalWatts =  68,577
      (1941) #Stations =  11    TotalWatts =  38,250

 630  (2018) #Stations =  25    TotalWatts =  55,374
      (1941) #Stations =   6    TotalWatts =  17,200

 640  (2018) #Stations =  15    TotalWatts =  71,660
      (1941) #Stations =   3    TotalWatts =  55,500

 650  (2018) #Stations =   8    TotalWatts = 113,420
      (1941) #Stations =   1    TotalWatts =  50,000

 660  (2018) #Stations =  12    TotalWatts = 125,179
      (1941) #Stations =   2    TotalWatts =  50,500

 670  (2018) #Stations =   9    TotalWatts = 121,003
      (1941) #Stations =   1    TotalWatts =  50,000

 680  (2018) #Stations =  20    TotalWatts = 226,216
      (1941) #Stations =   3    TotalWatts = 102,500

 690  (2018) #Stations =  19    TotalWatts =  53,274
      (1941) #Stations =   0    TotalWatts =       0

 700  (2018) #Stations =   8    TotalWatts =  73,690
      (1941) #Stations =   1    TotalWatts =  50,000

 710  (2018) #Stations =  15    TotalWatts = 201,560
      (1941) #Stations =   3    TotalWatts =  65,000

 720  (2018) #Stations =   6    TotalWatts = 111,286
      (1941) #Stations =   1    TotalWatts =  50,000

 730  (2018) #Stations =  29    TotalWatts =   4,714
      (1941) #Stations =   0    TotalWatts =       0

 740  (2018) #Stations =  28    TotalWatts = 196,021
      (1941) #Stations =   4    TotalWatts =  52,250

 750  (2018) #Stations =   8    TotalWatts = 139,630
      (1941) #Stations =   2    TotalWatts =  52,500

 760  (2018) #Stations =  11    TotalWatts = 119,771
      (1941) #Stations =   4    TotalWatts =  57,000

 770  (2018) #Stations =  10    TotalWatts = 122,180
      (1941) #Stations =   2    TotalWatts =  60,000

 780  (2018) #Stations =   8    TotalWatts = 115,049
      (1941) #Stations =   9    TotalWatts =  29,750

 790  (2018) #Stations =  41    TotalWatts =  60,498
      (1941) #Stations =   3    TotalWatts =  58,500

 800  (2018) #Stations =  29    TotalWatts =  16,513
      (1941) #Stations =   2    TotalWatts = 100,000

 810  (2018) #Stations =  16    TotalWatts = 207,678
      (1941) #Stations =   2    TotalWatts =  51,000

 820  (2018) #Stations =  12    TotalWatts =  73,335
      (1941) #Stations =   1    TotalWatts =  50,000

 830  (2018) #Stations =  11    TotalWatts = 154,750
      (1941) #Stations =   4    TotalWatts =  57,000

 840  (2018) #Stations =  10    TotalWatts =  83,105
      (1941) #Stations =   0    TotalWatts =       0

 850  (2018) #Stations =  17    TotalWatts = 229,930
      (1941) #Stations =   4    TotalWatts =  56,250

 860  (2018) #Stations =  27    TotalWatts =  81,799
      (1941) #Stations =   2    TotalWatts =  51,000

 870  (2018) #Stations =   9    TotalWatts =  63,500
      (1941) #Stations =   2    TotalWatts = 100,000

 880  (2018) #Stations =  16    TotalWatts = 132,022
      (1941) #Stations =  12    TotalWatts =  15,250

 890  (2018) #Stations =  11    TotalWatts =  83,810
      (1941) #Stations =   8    TotalWatts =  27,500

 900  (2018) #Stations =  42    TotalWatts =  16,948
      (1941) #Stations =  11    TotalWatts =  30,000

 910  (2018) #Stations =  48    TotalWatts = 103,992
      (1941) #Stations =   0    TotalWatts =       0

 920  (2018) #Stations =  43    TotalWatts =  51,396
      (1941) #Stations =   8    TotalWatts =  19,500

 930  (2018) #Stations =  48    TotalWatts =  61,745
      (1941) #Stations =   5    TotalWatts =  16,500

 940  (2018) #Stations =  31    TotalWatts = 102,952
      (1941) #Stations =   7    TotalWatts =  27,000

 950  (2018) #Stations =  42    TotalWatts = 175,799
      (1941) #Stations =   4    TotalWatts =  15,500

 960  (2018) #Stations =  43    TotalWatts =  65,320
      (1941) #Stations =   0    TotalWatts =       0

 970  (2018) #Stations =  50    TotalWatts =  84,713
      (1941) #Stations =   3    TotalWatts =  11,000

 980  (2018) #Stations =  43    TotalWatts =  77,055
      (1941) #Stations =   1    TotalWatts =  50,000

 990  (2018) #Stations =  37    TotalWatts =  57,793
      (1941) #Stations =   2    TotalWatts =  51,000

1000  (2018) #Stations =   8    TotalWatts = 107,940
      (1941) #Stations =   2    TotalWatts =  51,000

1010  (2018) #Stations =  33    TotalWatts =  97,098
      (1941) #Stations =   5    TotalWatts =  17,000

1020  (2018) #Stations =  11    TotalWatts = 164,600
      (1941) #Stations =   2    TotalWatts =  51,000

1030  (2018) #Stations =  16    TotalWatts = 123,103
      (1941) #Stations =   0    TotalWatts =       0

1040  (2018) #Stations =  10    TotalWatts =  68,113
      (1941) #Stations =   4    TotalWatts = 100,750

1050  (2018) #Stations =  45    TotalWatts =  67,845
      (1941) #Stations =   4    TotalWatts =  61,000

1060  (2018) #Stations =  20    TotalWatts =  70,437
      (1941) #Stations =   3    TotalWatts =  61,000

1070  (2018) #Stations =  21    TotalWatts = 110,877
      (1941) #Stations =   3    TotalWatts =  50,600

1080  (2018) #Stations =  16    TotalWatts = 145,216
      (1941) #Stations =   3    TotalWatts =  60,000

1090  (2018) #Stations =  10    TotalWatts = 157,238
      (1941) #Stations =   1    TotalWatts =  50,000

1100  (2018) #Stations =   8    TotalWatts = 115,240
      (1941) #Stations =   5    TotalWatts =  72,000

1110  (2018) #Stations =  10    TotalWatts = 141,012
      (1941) #Stations =   2    TotalWatts =  55,000

1120  (2018) #Stations =   9    TotalWatts = 103,705
      (1941) #Stations =  13    TotalWatts =  13,350

1130  (2018) #Stations =  18    TotalWatts = 164,484
      (1941) #Stations =   2    TotalWatts =  70,000

1140  (2018) #Stations =  14    TotalWatts = 150,746
      (1941) #Stations =   2    TotalWatts =  30,000

1150  (2018) #Stations =  48    TotalWatts = 113,462
      (1941) #Stations =   1    TotalWatts =  50,000

1160  (2018) #Stations =  25    TotalWatts = 126,221
      (1941) #Stations =   2    TotalWatts =  15,000

1170  (2018) #Stations =  13    TotalWatts = 139,368
      (1941) #Stations =   1    TotalWatts =  50,000

1180  (2018) #Stations =  14    TotalWatts =  80,935
      (1941) #Stations =   3    TotalWatts =  56,000

1190  (2018) #Stations =  20    TotalWatts = 103,867
      (1941) #Stations =   1    TotalWatts =  50,000

1200  (2018) #Stations =  14    TotalWatts = 148,070
      (1941) #Stations =  72    TotalWatts =  16,350

1210  (2018) #Stations =  19    TotalWatts =  98,977
      (1941) #Stations =  68    TotalWatts =  14,750

1220  (2018) #Stations =  43    TotalWatts =  55,519
      (1941) #Stations =  10    TotalWatts =  28,250

1230  (2018) #Stations = 164    TotalWatts = 156,357
      (1941) #Stations =   7    TotalWatts =  23,000

1240  (2018) #Stations = 154    TotalWatts = 148,812
      (1941) #Stations =   5    TotalWatts =  11,750

1250  (2018) #Stations =  52    TotalWatts =  65,657
      (1941) #Stations =   9    TotalWatts =  21,000

1260  (2018) #Stations =  51    TotalWatts =  90,041
      (1941) #Stations =  10    TotalWatts =  25,250

1270  (2018) #Stations =  53    TotalWatts = 114,009
      (1941) #Stations =   9    TotalWatts =  17,700

1280  (2018) #Stations =  52    TotalWatts =  53,333
      (1941) #Stations =   8    TotalWatts =  17,250

1290  (2018) #Stations =  48    TotalWatts =  83,100
      (1941) #Stations =   9    TotalWatts =  25,700

1300  (2018) #Stations =  59    TotalWatts = 130,076
      (1941) #Stations =   9    TotalWatts =  21,000

1310  (2018) #Stations =  55    TotalWatts =  66,965
      (1941) #Stations =  69    TotalWatts =  15,550

1320  (2018) #Stations =  56    TotalWatts =  72,802
      (1941) #Stations =   6    TotalWatts =  21,500

1330  (2018) #Stations =  53    TotalWatts =  84,399
      (1941) #Stations =   8    TotalWatts =  23,500

1340  (2018) #Stations = 163    TotalWatts = 154,407
      (1941) #Stations =   9    TotalWatts =  16,250

1350  (2018) #Stations =  56    TotalWatts =  48,789
      (1941) #Stations =   6    TotalWatts =  19,000

1360  (2018) #Stations =  58    TotalWatts =  58,040
      (1941) #Stations =   8    TotalWatts =  10,750

1370  (2018) #Stations =  53    TotalWatts =  87,796
      (1941) #Stations =  81    TotalWatts =  18,350

1380  (2018) #Stations =  58    TotalWatts = 129,410
      (1941) #Stations =   5    TotalWatts =   9,000

1390  (2018) #Stations =  54    TotalWatts =  78,856
      (1941) #Stations =   6    TotalWatts =  18,000

1400  (2018) #Stations = 175    TotalWatts = 170,415
      (1941) #Stations =   6    TotalWatts =  16,500

1410  (2018) #Stations =  56    TotalWatts =  53,636
      (1941) #Stations =   8    TotalWatts =   9,500

1420  (2018) #Stations =  61    TotalWatts =  53,262
      (1941) #Stations =  61    TotalWatts =  13,450

1430  (2018) #Stations =  57    TotalWatts =  97,857
      (1941) #Stations =   8    TotalWatts =  20,000

1440  (2018) #Stations =  56    TotalWatts =  44,551
      (1941) #Stations =   7    TotalWatts =  13,500

1450  (2018) #Stations = 175    TotalWatts = 167,406
      (1941) #Stations =   7    TotalWatts =  15,000

1460  (2018) #Stations =  65    TotalWatts =  77,316
      (1941) #Stations =   2    TotalWatts = 100,000

1470  (2018) #Stations =  47    TotalWatts =  62,378
      (1941) #Stations =   3    TotalWatts =  15,000

1480  (2018) #Stations =  63    TotalWatts =  72,040
      (1941) #Stations =   3    TotalWatts =  15,000

1490  (2018) #Stations = 182    TotalWatts = 174,560
      (1941) #Stations =   2    TotalWatts =  60,000

1500  (2018) #Stations =  13    TotalWatts = 121,038
      (1941) #Stations =  62    TotalWatts =  14,450

1510  (2018) #Stations =  12    TotalWatts = 144,770
      (1941) #Stations =   0    TotalWatts =       0

1520  (2018) #Stations =  18    TotalWatts = 196,492
      (1941) #Stations =   0    TotalWatts =       0

1530  (2018) #Stations =  11    TotalWatts = 110,763
      (1941) #Stations =   3    TotalWatts =   3,000

1540  (2018) #Stations =  23    TotalWatts = 149,357
      (1941) #Stations =   0    TotalWatts =       0

1550  (2018) #Stations =  50    TotalWatts =  41,851
      (1941) #Stations =   2    TotalWatts =   6,000

1560  (2018) #Stations =  19    TotalWatts =  90,638
      (1941) #Stations =   0    TotalWatts =       0

1570  (2018) #Stations =  55    TotalWatts =  28,476
      (1941) #Stations =   0    TotalWatts =       0

1580  (2018) #Stations =  43    TotalWatts = 109,951
      (1941) #Stations =   0    TotalWatts =       0

1590  (2018) #Stations =  59    TotalWatts =  63,336
      (1941) #Stations =   0    TotalWatts =       0

1600  (2018) #Stations =  58    TotalWatts =  96,127
      (1941) #Stations =   0    TotalWatts =       0

Total watts 2018 = 10,829,145
Total watts 1941 =  3,389,200

If you want a good example of present-day nighttime confusion, one only has to look at a single channel, perhaps one of the worst. 1490 KHz, one of our US graveyard channels has 182 stations transmitting all at once. The results are shown below. Reception contours are set to the 0.1 mV/m level, a level which should generate signal in even the most marginal receiver, within range.

Good days must be ahead.

The Graveyard (and only part of it). 1490 KHZ

Thursday, June 9, 2016

FCC Providing AM Daytime Contour Maps

Not sure it's been mentioned on the forums before, but the FCC's AM broadcast query now includes links showing a daytime groundwave contour map for each station in the database. These, super-imposed over either a Bing-based map or USGS map or Google Earth. Links for pure KML coordinates are also provided for those wanting to map their own.

Only daytime groundwave contours are provided, out to the 2.0 mV/m and 0.5 mV/m contours.

Go to the AM Query page:

https://www.fcc.gov/media/radio/am-query

Type in a call sign, like KFI (640 KHz, Los Angeles), hit enter, and on the next page shown, click on the station call sign of interest.

The facility record of KFI:

https://transition.fcc.gov/fcc-bin/amq?list=0&facid=34425

Look for the following links at the bottom of the daytime record:

Maps:
      Daytime Groundwave 0.5 mV/m Service (and 2.0 mV/m) contours on Bing map
      Daytime Groundwave 0.5 mV/m Service (and 2.0 mV/m) contours on Open Street or USGS Maps
      KML / Google Earth (0.5 mV/m Daytime Groundwave Service and 2.0 mV/m contours)
      Text file for KML-capable browsers

Click on one of the map links and a contour map will be shown.

This is a nice innovation by the FCC. Hopefully, skywave plots will be implemented next.

FCC's contour map for KFI-640

Monday, April 25, 2016

What's On The Mediumwaves (Daytime)

Here are some interesting statistics compiled today using the FCC database 04-25-2016. All data are for US licensed stations in the DAYTIME and UNLIMITED services. Stations outside the continental US (Hawaii, Alaska, Puerto Rico, etc.) are also included.

DAYTIME AND UNLIMITED STATION DETAILS REPORT

Separate facilities: 4,672 (includes SILENT facilities)

Notes:

(U) = UNLIMITED
(D) = DAYTIME

=====================================

(CL) Current, License records: 4,672

UNLIMITED: 781
DAYTIME: 3,891

IBOC UNLIMITED: 53 registered
IBOC DAYTIME: 187 registered

Class A: 73
Class B: 1,747
Class C: 997
Class D: 1,855

W-Call Signs: 2,784
K-Call Signs: 1,888

Services above band center (1115 KHz): 3,128
Services below band center (1115 KHz): 1,544

East of St. Louis, MO: 2,711
West of St. Louis, MO: 1,961

Quadrant 1 (NE) from St. Louis, MO: 1,169
Quadrant 2 (SE) from St. Louis, MO: 1,542
Quadrant 3 (SW) from St. Louis, MO: 1,007
Quadrant 4 (NW) from St. Louis, MO: 954

Combined power (watts): 27,924,750

Total towers: 7,054

Tallest tower: 951 feet (290 meters) (D)WKY-930.000 (0.899 wavelength)
Shortest tower: 50 feet (15 meters) (D)KJNT-1490.000 (0.076 wavelength)

Towers taller than 225° (0.625 wavelength or 5/8 wave): 42 (D)WGKA-920.000 (D)WKY-930.000 (U)KDKA-1020.000 (D)WHO-1040.000 (D)KMTA-1050.000 (D)WZOT-1220.000 (D)KWIX-1230.000 (U)WBVP-1230.000 (D)WJOI-1230.000 (D)KTAM-1240.000 (D)WGVM-1260.000 (D)WIJD-1270.000 (D)WKLJ-1290.000 (D)KTCK-1310.000 (D)WAGF-1320.000 (U)KDTD-1340.000 (U)KSEK-1340.000 (D)KRMD-1340.000 (U)WXKX-1340.000 (D)WLOU-1350.000 (D)KMJM-1360.000 (D)WSTC-1400.000 (U)KMNV-1400.000 (D)KKLO-1410.000 (D)WAOC-1420.000 (D)WPRS-1440.000 (D)KKXL-1440.000 (D)WMBD-1470.000 (U)WSIP-1490.000 (U)WOMI-1490.000 (U)WKLQ-1490.000 (D)KSTP-1500.000 (D)WLGN-1510.000 (D)KOLM-1520.000 (D)KFBK-1530.000 (D)WJZI-1540.000 (D)WSLA-1560.000 (D)WTAY-1570.000 (D)WBGZ-1570.000 (D)WFUR-1570.000 (D)WBCP-1580.000 (D)KTIQ-1660.000

Towers shorter than 36° (0.100 wavelength or 1/10 wave): 6 (D)KAPS-660.000 (D)KCFM-1250.000 (D)WKCY-1300.000 (D)KFJL-1400.000 (D)KBZY-1490.000 (D)KJNT-1490.000

Towers taller than 750ft: 5 (D)WNAX-570.000 (D)KMJ-580.000 (U)WSM-650.000 (D)WKY-930.000 (D)WHO-1040.000

Towers shorter than 75ft: 11 (D)KCFM-1250.000 (D)WKCY-1300.000 (D)KFJL-1400.000 (D)WZBR-1410.000 (D)WLUX-1450.000 (D)WIRB-1490.000 (D)KLZN-1490.000 (D)KBZY-1490.000 (D)KJNT-1490.000 (D)KVOG-1530.000 (D)WPDC-1600.000

Total of all tower heights: 1,748,752 feet (533,020 meters)

Greatest tower spacing with respect to array reference point: 2,246 feet (685 meters) (D)KNFL-730.000 (1.667 wavelength)
Closest tower spacing with respect to array reference point: 10 feet (3 meters) (D)WBRD-1420.000 (0.014 wavelength)

Tower type 1 count: 6,555 normal mast
Tower type 2 count: 489 top loaded
Tower type 3 count: 4 sectionalized, top loaded (U)KNBR-680.000 (U)KDKA-1020.000 (D)WHO-1040.000 (D)WOC-1420.000
Tower type 4 count: 6 sectionalized, not top loaded (D)WKY-930.000 (D)KTTO-970.000 (D)WROK-1440.000 (D)KSTP-1500.000 (D)KFBK-1530.000

Omni-directional arrays (single tower): 3,474
Directional arrays (multi-tower): 1,198

Highest RMSTheoretical mV/m (published) at 1 km: 3545.89 (D)KFBK-1530.000
Lowest RMSTheoretical mV/m (published) at 1 km: 140.82 (D)WCTA-810.000

Single tower lowest gain in dB (calculated): -3.743 (D)WSEV-930.000 (rms standard)
Single tower lowest mV/m at 1 km (calculated): 133.805 (D)KOBO-1450.000 (rms standard)
Single tower highest gain in dB (calculated): 4.899 (D)KSTP-1500.000 (rms standard)
Single tower highest mV/m at 1 km (calculated): 3800.424 (D)KSTP-1500.000 (rms standard)

Multi-tower deepest array notch in dB (calculated): -30.534 (U)WKGE-850.000 (rms standard)
Multi-tower deepest array notch in mV/m at 1 km (calculated): 10.5 (D)WAKY-620.000 (rms standard)
Multi tower highest array gain in dB (calculated): 11.988 (D)KGOW-1560.000 (rms standard)
Multi tower highest array mV/m at 1 km (calculated): 8244.295 (D)KGOW-1560.000 (rms standard)

What's On The Mediumwaves (Nighttime)

Here are some interesting statistics compiled today using the FCC database 04-25-2016. All data are for US licensed stations in the NIGHTTIME and UNLIMITED services. Stations outside the continental US (Hawaii, Alaska, Puerto Rico, etc.) are also included.

NIGHTTIME AND UNLIMITED STATION DETAILS REPORT

Separate facilities: 4,106 (includes SILENT facilities)

Notes:

   (U) = UNLIMITED
   (N) = NIGHTTIME

=====================================

(CL) Current, License records: 4,106

UNLIMITED: 781
NIGHTTIME: 3,325

IBOC UNLIMITED: 53 registered
IBOC NIGHTTIME: 181 registered

Class A: 73
Class B: 1,746
Class C: 996
Class D: 1,291

W-Call Signs: 2,350
K-Call Signs: 1,756

Services above band center (1115 KHz): 2,818
Services below band center (1115 KHz): 1,288

East of St. Louis, MO: 2,282
West of St. Louis, MO: 1,824

Quadrant 1 (NE) from St. Louis, MO: 1,015
Quadrant 2 (SE) from St. Louis, MO: 1,267
Quadrant 3 (SW) from St. Louis, MO: 921
Quadrant 4 (NW) from St. Louis, MO: 903

Combined power (watts): 10,898,247

Total towers: 7,761

Tallest tower: 992 feet (302 meters) (N)WRDT-560.000 (0.565 wavelength)
Shortest tower: 32 feet (10 meters) (N)WSIV-1540.000 (0.050 wavelength)

Towers taller than 225° (0.625 wavelength or 5/8 wave): 36 (N)WGKA-920.000 (N)WKY-930.000 (U)KDKA-1020.000 (N)WHO-1040.000 (N)KMTA-1050.000 (N)WZOT-1220.000 (N)KWIX-1230.000 (U)WBVP-1230.000 (N)WJOI-1230.000 (N)KTAM-1240.000 (N)WGVM-1260.000 (N)WIJD-1270.000 (N)WKLJ-1290.000 (N)KTCK-1310.000 (N)WAGF-1320.000 (U)KDTD-1340.000 (U)KSEK-1340.000 (N)KRMD-1340.000 (U)WXKX-1340.000 (N)WLOU-1350.000 (N)KMJM-1360.000 (N)WSTC-1400.000 (U)KMNV-1400.000 (N)KKLO-1410.000 (N)WAOC-1420.000 (N)WPRS-1440.000 (N)KKXL-1440.000 (N)WMBD-1470.000 (U)WSIP-1490.000 (U)WOMI-1490.000 (U)WKLQ-1490.000 (N)KFBK-1530.000 (N)WBGZ-1570.000 (N)WFUR-1570.000 (N)WBCP-1580.000 (N)KTIQ-1660.000

Towers shorter than 36° (0.100 wavelength or 1/10 wave): 7 (N)KAPS-660.000 (N)KCFM-1250.000 (N)WKCY-1300.000 (N)KFJL-1400.000 (N)KBZY-1490.000 (N)KJNT-1490.000 (N)WSIV-1540.000

Towers taller than 750ft: 6 (N)WRDT-560.000 (N)WNAX-570.000 (N)KMJ-580.000 (U)WSM-650.000 (N)WKY-930.000 (N)WHO-1040.000

Towers shorter than 75ft: 12 (N)KCFM-1250.000 (N)WKCY-1300.000 (N)KFJL-1400.000 (N)WZBR-1410.000 (N)WLUX-1450.000 (N)WIRB-1490.000 (N)KLZN-1490.000 (N)KBZY-1490.000 (N)KJNT-1490.000 (N)KVOG-1530.000 (N)WSIV-1540.000 (N)WPDC-1600.000

Total of all tower heights: 1,943,521 feet (592,385 meters)

Greatest tower spacing with respect to array reference point: 2,663 feet (812 meters) (N)KBOW-550.000 (1.489 wavelength)
Closest tower spacing with respect to array reference point: 10 feet (3 meters) (N)WBRD-1420.000 (0.014 wavelength)

Tower type 1 count: 7,230 normal mast
Tower type 2 count: 522 top loaded
Tower type 3 count: 4 sectionalized, top loaded (U)KNBR-680.000 (U)KDKA-1020.000 (N)WHO-1040.000 (N)WOC-1420.000
Tower type 4 count: 5 sectionalized, not top loaded (N)KBIF-900.000 (N)WKY-930.000 (N)WROK-1440.000 (N)KFBK-1530.000

Omni-directional arrays (single tower): 2,471
Directional arrays (multi-tower): 1,635

Highest RMSTheoretical mV/m (published) at 1 km: 3126.79 (N)KFBK-1530.000
Lowest RMSTheoretical mV/m (published) at 1 km: 9.75 (N)KLEY-1130.000

Single tower lowest gain in dB (calculated): -14.71 (N)WDOC-1310.000 (rms standard)
Single tower lowest mV/m at 1 km (calculated): 8.889 (N)WDOC-1310.000 (rms standard)
Single tower highest gain in dB (calculated): 4.188 (N)WHO-1040.000 (rms standard)
Single tower highest mV/m at 1 km (calculated): 3501.793 (N)WHO-1040.000 (rms standard)

Multi-tower deepest array notch in dB (calculated): -39.835 (N)WAQI-710.000 (rms standard)
Multi-tower deepest array notch in mV/m at 1 km (calculated): 0.585 (N)WWSJ-1580.000 (rms standard)
Multi tower highest array gain in dB (calculated): 12.717 (N)KNTH-1070.000 (rms standard)
Multi tower highest array mV/m at 1 km (calculated): 7592.594 (N)WWJ-950.000 (rms standard)