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Chatham in Barnstable County, Massachusetts — The American Northeast (New England)
 

Antenna Trail Exhibits

Chatham Radio WCC – Receiving Station – Antenna Field Trail

 

— Chatham Marconi Maritime Center —

 
Antenna Trail Exhibits Marker image. Click for full size.
By Brandon D Cross, October 6, 2020
1. Antenna Trail Exhibits Marker
Inscription.  

On this trail, you will see several different types of antennas that are representative of some of the antennas which were used at WCC, both here and at the transmitter site on Forest Beach in South Chatham. There are several half wave dipole antennas, a “Marconi T” antenna, and a “H over 2” antenna.

Additionally, there is a “Yagi” beam antenna and an Off-Center-Fed (OCF) dipole antenna. These antennas are recent additions, installed for the use of the WCC Armature Radio Association (WCC ARA) and are not original to WCC.

All Antennas you see are fully functional and often used by the SS Hope/WHNJ exhibit or the WCC ARA.

Dipole Antennas
The dipole was the earliest type of antenna. It was invented by German physicist Heinrich Hertz around 1886. The dipole antenna or doublet is the simplest and most widely used class of antenna. Dipoles are resonant antennas, with standing waves of radio current flowing back and forth between their ends. The length of the dipole elements is determined by the wavelength of the radio frequency on which the antenna will be
Antenna Trail Exhibits Marker image. Click for full size.
By Brandon D Cross, October 6, 2020
2. Antenna Trail Exhibits Marker
used.

The most common form is the half-wave dipole, in which each of the two elements is approximately ¼ wavelength long, so the whole antenna is a half-wavelength long.

Dipoles mounted horizontally (as is most common) will have gain in two opposing horizontal directions, perpendicular to the antenna axis, but nodes (directions of zero gain) at 90* from those directions. Neglecting electrical inefficiency, the antenna gain is equal to the directive gain, approximately 1.64 or 2.15dBi for a half-wave dipole.

WCC had dipoles cut for the marine frequencies of 8MHz, 16MHz, 16MNz and 22 MHz at both this location and at the transmitter site. On this trail you will find dipoles that are cut for the Amateur Radio frequencies of 3.550MHz [80 meters ], 7.100MHz [40 meters], 10.110MHz [30 meters], 18.110MHz [17 meters], and 24.910MHz [12 meters].

 
Erected by Chatham Marconi Maritime Center.
 
Topics. This historical marker is listed in this topic list: Communications.
 
Location. 41° 42.212′ N, 69° 58.872′ W. Marker is in Chatham, Massachusetts, in Barnstable County. Marker can be reached from Orleans Road (Massachusetts Route 28) 0.1 miles west of Old Comers Road. The marker is located on the Antenna Field Trail within the Chatham
Photo Insert (Right Bottom) Aerial View of Antenna Field image. Click for full size.
By Brandon D Cross, October 6, 2020
3. Photo Insert (Right Bottom) Aerial View of Antenna Field
Aerial view of this hill behind the operating building, showing antennas in place as of 2016. The 12m and 17m dipoles replace original WCC 16 and 22 MHz dipoles
Marconi Maritime Center. Touch for map. Marker is at or near this postal address: 847 Orleans Road, Chatham MA 02633, United States of America. Touch for directions.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. The 1914 Marconi Radio Station Complex (here, next to this marker); Operations Building (within shouting distance of this marker); Chatham Radio/WCC (within shouting distance of this marker); Historic Receiving Antennas (within shouting distance of this marker); “Marconi T” Antenna (within shouting distance of this marker); Employee Residence (about 300 feet away, measured in a direct line); Aerial View of the Marconi-RCA Complex, circa 1930 (about 400 feet away); The Nickerson Family (approx. half a mile away). Touch for a list and map of all markers in Chatham.
 
12m Dipole Antenna located on the Antenna Field Trail image. Click for full size.
By Brandon D Cross, October 6, 2020
4. 12m Dipole Antenna located on the Antenna Field Trail
Antenna Field Trail Sign image. Click for full size.
By Brandon D Cross, October 6, 2020
5. Antenna Field Trail Sign
 
 
Credits. This page was last revised on November 6, 2020. It was originally submitted on November 6, 2020, by Brandon D Cross of Flagler Beach, Florida. This page has been viewed 45 times since then. Photos:   1, 2, 3, 4, 5. submitted on November 6, 2020, by Brandon D Cross of Flagler Beach, Florida. • J. Makali Bruton was the editor who published this page.
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Mar. 7, 2021