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For example a simple WSPR beacon can be built using the Si 570, [5] or Si 5351. [6] The Raspberry Pi can also be used as WSPR beacon. Density distribution of WSPR spots, January 2014 vs July 2014, using only most distant reception per spot. An accurate clock is essential both for transmission and decoding of received signals.
A large-scale beacon project is underway using the WSPR transmission scheme included with the WSJT software suite. The loosely coordinated beacon transmitters and receivers, collectively known as the WSPRnet, report the real-time propagation characteristics of a number of frequency bands and geographical locations via the Internet.
On November 20, 1968, Radiodifusora del Pacífico, S.A. de C.V., then-owner of AM 690 XETRA (now XEWW), received a concession for a new FM station with the call sign, XETRA-FM on 91.3 MHz. At first, the station broadcast with 3,000 watts from the AM transmitter site in Playas de Rosarito .
The operation moved to Oceanside, California, where, at one point, more than 400 radios per month were being manufactured, and some estimates say that more than 80,000 transceivers were sold during the company's lifetime. [1] [2] Swan merged with Cubic Corporation in 1967, and Johnson managed Swan as its subsidiary until 1973.
The beacon and a number of other South African stations are running WSPR mode for experimental purposes. (WSPR is configured as Dial Freq USB 5287.2 kHz TX Freq 5288.7 kHz, which is within the channel allocation) 5290.0 kHz: South Africa: ZS1OA: JF95fx: This is a permanent WSPR beacon located at Cape Town. 5291.0 kHz: Switzerland: HB9AW: JN47be
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XEPRS (1090 kHz) is an AM commercial radio station licensed to Playas de Rosarito, a suburb of Tijuana in Baja California, Mexico. It broadcasts an Oldies and Spanish Catholic radio format. The station can be heard across the San Diego-Tijuana, Los Angeles-Orange County, Riverside-San Bernardino and areas of Southern California.
The station can be heard over much of Central California during the day. By day, KSCO broadcasts at 10,000 watts . Because 1080 AM is a clear channel frequency reserved for KRLD Dallas and WTIC Hartford , at sunset, to avoid interference, KSCO reduces power to 28 watts.