GEORGE M (N2XM)'S NDB IMAGES

~~ GALLERY ONE ~~

On this page you will find a collection of George's NDB images, all of which are located at Airports and airfields in the state of Tennessee, USA. These include the following installations: 'AEY' - 329.0 kHz at Humphreys County Airport, Waverly [Pictures taken 9 April 2012], 'HZD' - 217.0 kHz at Carroll County Airport, Huntingdon [Pictures were taken 19 July 2012], 'JUE' - 414.0 kHz at Lebanon Municipal Airport Lebanon [Pictures taken 13 August 2012], 'DMZ' - 203.0 kHz at Dickson County Airport, 2370 Sylvia Rd, 37055, Dickson [Pictures taken 13 July 2012], 'CK' - 335 kHz at 'Snuff' Clarksville, TN [Seven pictures taken 2 Oct 2012], and 'FK' - 273 kHz at 'Airbie' Fort Campbell (Hopkinsville, KY) [Seven pictures taken 2 Oct 2012].

NOTE# All of the following pictures are copyright 'George M N2XM', and should not be re-produced with out first obtaining his permission - please ask us for his contact details if you should require them.



Click on the images to see the full sized larger versions:

AEY 329.0 kHzAEY on 329.0 kHz at Humphreys County Airport, Waverly, TN:

Southern Avionics Symmetrical T antenna (omni-directional vertical) with an electrical length of about 17 meters. Average transmitter power output 25 watts, 75% modulation. The towers, separated by about 300 feet, have a height of 60 feet and are located on west side of the runway at Humphreys County Airport, Waverly, TN, 37185. Ground elevation 737 feet. Google Map coordinates: 36 06 41.90N 87 44 24.27W. (296.0kb)
AEY 329.0 kHzAEY on 329.0 kHz at Humphreys County Airport, Waverly, TN:

Antenna coupler designed to match a 700-1500pF/2-25 ohms antenna load. AEY's actual antenna load unknown. (379.0 kb)
AEY 329.0 kHzAEY on 329.0 kHz at Humphreys County Airport, Waverly, TN:

Another "NDB" at the airport but operating at a much, much shorter wavelength. Powered up from dusk-to-dawn, for a given direction its signal is "modulated" on-off by the simple expedient of rotating the "transmitter" clockwise at 1 rpm through 360 degrees. Reportedly it is the oldest rotating aircraft navigational light beacon in continuous use in the state of Tennessee. (310.0 kb)


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HZD 217.0 kHz, Carroll County, TNHZD on 217.0 kHz Carroll County Airport, Huntingdon, TN:

Water tower 500 feet due west of the main runway at the Carroll County Airport, Huntingdon, TN. HZD, 217 kHz, is located 300 west of, and parallel to, the north-south runway at this airport. The airport is located in a flat rural area listed as 488 feet above mean sea level with much, repeat much, surrounding farmland planted with corn. Google coordinates: 36 05 18.52N 088 28 00.684W. (220.0 kb)
HZD 217.0 kHz, Carroll County, TNHZD on 217.0 kHz Carroll County Airport, Huntingdon, TN:

Although the configuration is the standard Southern Avionics Parallel T antenna (60 foot towers, 300 foot dual-wire capacitance hat), this NDB's transmitter outputs about twice the average power of other NDBs in Middle Tennessee (45watts versus 25 watts for others - see picture 7). This NDB, akin to its Canadian cousins, transmits only the upper sideband (offset +996 Hz). (133.0 kb)
HZD 217.0 kHz, Carroll County, TNHZD on 217.0 kHz Carroll County Airport, Huntingdon, TN:

Linkage of the dual-wire capacitor "top hat" to the south tower. (135.0 kb)
HZD 217.0 kHz, Carroll County, TNHZD on 217.0 kHz Carroll County Airport, Huntingdon, TN:

Weatherproof shed housing the transmitter (white) with the coupling-matching unit (yellow) to the rear. Both units are located directly beneath the center of the wire top wire elements and are connect to same with #12 un-insulated copper-coated steel wire. (316.0 kb)
HZD 217.0 kHz, Carroll County, TNHZD on 217.0 kHz Carroll County Airport, Huntingdon, TN:

Coupling/matching unit. The small sign beneath the exit of the coupler wire reads “High Voltage/Haute Tension/Alto Voltaje". (250.0 kb)
HZD 217.0 kHz, Carroll County, TNHZD on 217.0 kHz Carroll County Airport, Huntingdon, TN:

View of the transmitter unit house in the white shed. The "SAC" logo on the top of the transmitter cabinet identifies it as a Southern Avionics product. (186.0 kb)
HZD 217.0 kHz, Carroll County, TNHZD on 217.0 kHz Carroll County Airport, Huntingdon, TN:

Close-up view of power meter, 50 watts full scale, registering about 45 watts transmitter output. (226.0 kb)
HZD 217.0 kHz, Carroll County, TNHZD on 217.0 kHz Carroll County Airport, Huntingdon, TN:

This NDB was shut down for most of April 2012 awaiting replacement parts. Part of the repair included the diode dangling from wires to the right of the barrier strip in the upper part of the picture. (249.0 kb)


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DMZ 203.0 kHzDMZ on 203.0 kHz at Dickson County Airport, Dickson, TN:

'listed as being 872 feet above mean sea level, is located on the grounds of the Dickson County Airport, 2370 Sylvia Rd, 37055, Dickson, TN, USA. A standard Southern Avionics Twin-T installation, it outputs an average power of 25 watt and is one of the few USA NDBs broadcasting its carrier modulated with only an upper sideband. To view the NDB's location “fly to” 36 07 38.312N 087 25 56.545W on Google Maps. (200.0 kb)
DMZ 203.0 kHzDMZ on 203.0 kHz at Dickson County Airport, Dickson, TN:

The weather-tight structures mount the transmitter (white unit) and matcher/coupler (yellow unit). (265.0 kb)
DMZ 203.0 kHzDMZ on 203.0 kHz at Dickson County Airport, Dickson, TN:

View of the attachment of the twin-wire capacitive "top hat" to the west tower. (67.1 kb)


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JUE 414.0 kHzJEU on 414.0 kHz at Lebanon Municipal Airport, Lebanon, TN:

The twin antenna towers at a ground elevation of about 550 feet, are located at east end of the Lebanon Municipal Airport Lebanon, TN, USA. In this picture the east tower is seen to the right of the plane's left wing tip, the west tower to the left of the wind sock. The airport and towers can be viewed on Google Maps by "flying to" 36.192164 -86.313822. (218.0 kb)
JUE 414.0 kHzJEU on 414.0 kHz at Lebanon Municipal Airport, Lebanon, TN:

A standard Southern Avionics Symmetrical T antenna (omni-directional vertical). The antenna towers, separated by about 300 feet, have a height of 63 feet. The transmitter and coupler are located in the white shed immediately below center of the twin-wire "top hat". (159.0 kb)
JUE 414.0 kHzJEU on 414.0 kHz at Lebanon Municipal Airport, Lebanon, TN:

Close-up view of attachment of the twin-wire capacitive "top hat" to the west antenna tower. (71.4 kb)


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CK 335.0 kHzCK on 335.0 kHz at 'Snuff' Clarksville, TN:

This NDB is located in a heavily wood section aside a gravel road (Davis Rd) off Hilltop Drive in Clarksville, TN. At 485 ft above mean sea level, it is at the highest elevation in the area. (248.0 kb)
CK 335.0 kHzCK on 335.0 kHz at 'Snuff' Clarksville, TN:

The tower, with “top hat” capacity provided by six spokes, is itself the vertical radiator. The tower is about forty feet high and presumably has a counterpoise buried beneath. Each of the posts in the security fence are connected via a metal strap to a ground stake at their base perhaps adding to the counterpoise. (Straps visible under close examination in Pic #1.) (113.0 kb)
CK 335.0 kHzCK on 335.0 kHz at 'Snuff' Clarksville, TN:

Insulators separating the radiator section of the tower from ground. The feed point, about 1.5 feet above the insulation base, is not seen in this view. (423.0 kb)
CK 335.0 kHzCK on 335.0 kHz at 'Snuff' Clarksville, TN:

The vertical radiator (insulated tower) is fed by heavy insulated wire from a long tube running from the far side of the transmitter “shack”. (See next picture.) The feed point is about 1.5 feet above the towers insulators. (209.0 kb)
CK 335.0 kHzCK on 335.0 kHz at 'Snuff' Clarksville, TN:

Another view of the long tube lying on the roof through which the transmitter in the shack is connected to the vertical radiator. The base loading coil may be contained within this tube. (213.0 kb)
CK 335.0 kHzCK on 335.0 kHz at 'Snuff' Clarksville, TN:

The 75 MHz dual V-Yagi outer marker use in conjunction with the NDB. (178.0 kb)
CK 335.0 kHzCK on 335.0 kHz at 'Snuff' Clarksville, TN:

A general purpose notice. (405.0 kb)
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CK 273.0 kHzFK on 273.0 kHz at 'Snuff' Clarksville, TN:

NDB FK-273 is located along Pendleton-Fidelio Rd, a short distance off US Interstate 24 in Hopkinsville, KY. This country road is surrounded by acres of soybean and alfalfa plantings and essentially shorn of any private residences. FK is a US Army NDB reportedly serving as an outer marker for one of the runways on Campbell Field Airport on the Fort Campbell base. The base, home to the US Army's 101st Airborne Division, covers over 100,000 acres and straddles the Kentucky-Tennessee border. (194.0 kb)
FK 273.0 kHzFK 273 kHz 'Airbie' Fort Campbell (Hopkinsville, KY):

View of the center-fed, one-wire flattop antenna. The poles are estimated to be 40 feet high. No evidence of a counterpoise was seen but presumably such is buried under the rich farmland surrounding the site. (192.0 kb)
FK 273.0 kHzFK 273 kHz 'Airbie' Fort Campbell (Hopkinsville, KY):

Attachment of antenna to the south pole. The short wire leading from the antenna insulator to the lightning rod atop the pole connects directly to the steel guy wire supporting the pole. At its ground end the guy wire connect to a heavy steel stake driven into the ground and presumably grounding the lightning rod. In contrast to that observed at other NDB sites, the posts and wire in the surrounding security fence feature no special grounding arrangement. (103.0 kb)
FK 2735.0 kHzFK 273 kHz 'Airbie' Fort Campbell (Hopkinsville, KY):

An admonition to the adventuresome. (253.0 kb)
FK 273.0 kHzFK 273 kHz 'Airbie' Fort Campbell (Hopkinsville, KY):

The 75 MHz dual V-Yagi outer marker for use with the NDB. (225.0kb)
FK 273.0 kHzFK 273 kHz 'Airbie' Fort Campbell (Hopkinsville, KY):

Self explanatory. (365.0 kb)
FK 273.0 kHzFK 273 kHz 'Airbie' Fort Campbell (Hopkinsville, KY):

Current construction at the site. Another recently poured concrete pad is on the far side of the compound and is out of view in any of these photos. (367.0 kb)

George has a number of other Galleries as well, just click on the buttons below to visit them:


We're very grateful to George for sharing this wonderful piece of NDB history with us, and if you have shots of your own that you would also like to see on display here in the NDB List Photo Gallery, we would love to hear from you too!



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Last updated 1st of January 2017.
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