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BeachNet Remote Receiver Systems

Mountainous terrain, such as we enjoy here in the Discovery Coast region, can be challenging for siting repeaters. While the elevated vantage afforded by the peaks and ridges can be desirable for locating a repeater, providing generally good range, it is not uncommon for our users to experience multipath distortion. This is caused by the user's signal finding several reflected paths to the repeater receiver, none of which is truly line-of-sight. These combine to form a phase-distorted signal. If the distortion is severe enough, the CTCSS (PL) tone can be mutilated, not holding the tone decoder, letting the receiver squelch open and close and the transmission will "chop", making it unreadable, even with a relatively strong signal. The hilly terrain also causes users' signals to become weak when they enter shadowed "dead areas". Even when the user can hear the repeater relatively well, they find themselves unable to continue a conversation. The answer to this problem is a remote receiver placed close to the user, so that it hears the user better than the repeater site receiver.

BeachNet incorporates two remote receiver systems. The remote receiver system supporting the Megler 147.180 repeater, is the more elaborate, consisting of multiple remote receivers, with individual UHF relay links and a voting panel to automatically select the best of several receiver feeds. This generally overcomes the challenges imposed by local terrain in the south Pacific and north Clatsop county areas.

The other remote receiver system is much simpler. It supports the North Cove, 145.310, repeater coverage along Highway 101, from Naselle to Bay Center. This system consists of a single remote receiver in addition to the repeater itself. The user determines which receiver is used by selecting the correct CTCSS (PL) tone. This manual selection method gives our users complete control over their signal routing into the network.

Megler, 147.180 Repeater, Voting Receiver System

Highway 101, and State Routes 4 and 401 encircle Megler Mountain on which the Megler 147.180 repeater is located. These highways are "tucked under the toe" of the hill, meaning the bulk of the mountain is blocking the signal and there is no direct path to the repeater from users on these roads. The signal path in places is entirely reflected, exacerbating the multi-path problem. While the user can typically hear the high-power signal from the repeater fairly clearly with minor flutter and some noise, the relatively weak signal from the user back to the repeater may be of relatively poor quality. To solve this problem we have installed several Remote Receivers for the Megler 147.180 repeater. These all listen on the same channel frequency, and use the same CTCSS tone as the repeater receiver. To improve the user experience, an automatic Receiver Voting System manages these resources in real-time.

The Receiver Voting System uses a Voting Panel at the repeater site to continuously evaluate the signals fed in from the receivers, and "vote" which of the five has the best signal-to-noise-ratio at the moment. The user does nothing special to select the best receiver, except possibly to pause for a half-second between keying-up and talking. The Voting System selects the cleanest receiver feed available and presents that to the repeater transmitter automatically. Of course, this signal is also sent via the repeater network linking system to the other BeachNet repeaters.

The Remote Receivers are deliberately located around the perimeter of the coverage area to provide a clear line-of-sight path from mobile stations operating on the above-mentioned highways. these sites also have overlapping coverage, virtually eliminating dead spots in the Megler Repeater's coverage area. Even in places where the repeater transmitter sounds weak, with multi-path distortion and rough copy, the signal from the user is clean and clear. The signals from all five receivers (Cape Disappointment, Naselle, Warrenton, Seaside and the repeater receiver itself on Megler Mountain), are constantly evaluated and the best of the lot is routed to the transmitter. If you can hear the 147.180 Megler repeater clearly, you can probably work it, with a typical 50-watt mobile and a 5/8-wave vertical antenna.

The voting remote receiver system was brought on-line between September and November 2008, and has been fully operational since then. To use the Remote Receivers, set your radio to 147.180 +600 kHz, and your CTCSS (PL) tone to 82.5 Hz. The voting system will do the rest.


The Remote Receivers:

The Naselle Receiver (2000 ft), covers Hwy 4 from Wahkiakum County (MP-44) to "Johnson's Landing" (Hwy4 MP-0 at the Hwy101 junction); Hwy401 from the Columbia River shore (Knapton), north to Naselle; Hwy101 from the Willapa Wildlife Refuge headquarters (Hwy101 MP-20) north to Bay Center (Hwy101 MP-40); and the northern portion of the Long Beach Peninsula.

The Cape D Receiver (300 ft), covers Cape Disappointment State Park and environs; Hwy 101 from Astoria north to the Willapa Wildlife Refuge Headquarters; and the southern two-thirds of the Long Beach Peninsula.

The Megler Repeater Receiver (1300 ft), covers the Peninsula from Chinook north to Oysterville, and Astoria south to Seaside and east to Knappa.

The Warrenton Receiver (30 ft), covers Hwy 101 along the north shore of the Columbia River from Chinook, east to the Astoria-Megler Bridge, south to Astoria; Hwy 401 from the Bridge, east to Knapton; the south side of the hill in Astoria; and Hwy 101 south toward Seaside.

The Seaside Receiver (100 ft), covers the city of Seaside, its environs, and Hwy 101 from the Hwy 26 junction, north toward Warrenton. This receiver offers hand-held coverage for the SeaPac Ham Convention and the Hood-To-Coast Relay.

Four UHF link receivers and Voting Unit at the Megler site

Click Here or on Map to View Megler Repeater Receiver Locations
Click here for a plot of Combined Megler Receiver Coverage
Click here for Main System Coverage Map

Cape "D" Receiver

Warrenton Receiver

Naselle Receiver

Seaside Receiver

Megler Receiver

North Cove, 145.310 Repeater, Remote Receiver

One particularly "rough" area for our
North Cove repeater coverage is along Highway 101 from Milepost-26 (north of the Naselle River Bridge, but south of the the Hwy 4 Junction near Naselle) to Milepost-42 (the Palix River Bridge near Bay Center) The North Cove repeater transmitter serves this area fairly well, but with a site elevation of only 400 feet, the signal received by the repeater can be marginal from this deeply forested area, due to multi-path distortion and local terrain obstacles.

To solve this coverage problem, a Remote Receiver is located at 2000-feet on Naselle Ridge to pick up users' signals from an advantageous location. This high-level site provides superior coverage to most of the area served by the North Cove repeater. Installing a 2-meter repeater here would be problematic, due to the scarcity of available frequency pairs, and the strong likelihood of causing interference to an existing out-of-area repeater in that band. The installation of a Secondary Receiver, however is not so difficult, as our receiver is unlikely to interfere with another repeater elsewhere.

To utilize this Naselle Remote Receiver to improve your signal, all that is necessary is to change your PL (CTCSS) tone to 114.8 Hz., from the standard 118.8 Hz. used for the repeater site receiver. Many users install a second memory channel in their radio which transmits the different PL tone. In fact, there are few areas where this secondary receiver doesn't provide better performance than the primary receiver at the repeater site.


North Cove Receiver

Naselle Receiver

To use the North Cove Repeater with or without the Remote Receiver, set your radio to 145.310, -600 kHz, and your PL tone to:

118.8 Hz. to select the North Cove Receiver (400 ft. Elevation), located on the ocean bluffs above Tokeland.

114.8 Hz. to select the Naselle Receiver (2000 ft. Elevation), located on Naselle Ridge above Naselle.

The North Cove Repeater covers an area including Highway 101 from the Hwy 4 Junction, "Johnson's Landing", north to South Bend, and then west on Hwy 105 to Tokeland and Grayland. Within most of this area, the Naselle Receiver helps greatly, providing a superior receiver, assuring your signals will be picked up clearly.

Click Here or on Map to View North Cove Repeater Receiver Options
Click here for Main System Coverage Map



145.170 |  145.310 |  145.390 |  147.020 |  147.180 |  147.340 |  224.040 |  224.820 |  440.675 |  441.675 |  442.675 |  444.050 |  444.200 |  444.300 |  444.400 |  444.500 |  444.700 |  444.800 |  444.925 |  444.950

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This Page Last Updated: 07/26/18.