Battle of Dettingen

Karlstein am Main (officially Karlstein a. Main) is a municipality in the Aschaffenburg district in the Regierungsbezirk of Lower Franconia (Unterfranken) in Bavaria, Germany. It is the westernmost settlement in Bavaria. Karlstein's Ortsteile (constituent villages) are Dettingen and Großwelzheim, the former being notable as the site of the Battle of Dettingen during the War of the Austrian Succession. In the 20th century, the town was the site of the, now decommissioned, Großwelzheim Nuclear Power Plant.

Forchbach is a small river of Bavaria, Germany. It flows into the Main in Karlstein am Main.

Mainflingen is a village and part (Ortsteil) of the municipality Mainhausen, in the district of Offenbach in Hesse with about 4000 inhabitants. It is known for its time signal transmitter, DCF77, which controls almost all radio clocks in Western Europe.

Haggraben is a small river of Bavaria, Germany. It flows into the Forchbach in Karlstein am Main.

Kahl am Main (officially Kahl a. Main) is a community in the Aschaffenburg district in the Regierungsbezirk of Lower Franconia (Unterfranken) in Bavaria, Germany. It has around 7,500 inhabitants.

Bachquellengraben is a small river of Bavaria, Germany. It flows into the Forchbach near Karlstein am Main.

The Kahl is a river in the northern Spessart in Bavaria and Hesse, Germany. It is a right tributary of the Main and is 35.6 km (22.1 mi) long. The name Kahl comes from the Old High German word kaldaha, which means cool and clear. The Kahl rises from two sources left and right of the road at the foot of the Spessart hills, near Kleinkahl. These springs produce 50–60 litres per second. The Kahl flows into the river Main in Kahl am Main. The mouth is near the old Kahl Nuclear Power Plant. The largest tributaries are Westerbach, Sommerkahl, Reichenbach and Geiselbach.

The Kahl plant was the first nuclear power plant ever to be built in Germany. It was located in Karlstein am Main and was an (at the time) experimental boiling water reactor. It was built by General Electric and supplied by Siemens. At the end of 2008, the demolition works had been finished. The station was the subject of the 1961 short documentary film, Kahl.

Großwelzheim Nuclear Power Plant, (German: Kernkraftwerk Großwelzheim, HDR), was an experimental nuclear power plant consisting of one 25 MW reactor in Großwelzheim, a district of Karlstein am Main. The prototype boiling water reactor, designed to produce superheated steam was under construction from 1965 to 1969, and was first connected to the power grid on October 14, 1969. The reactor could not be run at full capacity due to structural defects in the fuel elements. Because of this, the reactor was switched off about a year and a half later on April 20, 1971. After the decommissioning in 1983, the plant was used for reactor safety tests until dismantling was completed in 1998.The site also included the Kahl Nuclear Power Plant, the first nuclear reactor to be built in Germany, as well as the first to be shut down. This makes the site the first in Germany where two reactors have been dismantled. When the community of Karlstein am Main was created in 1975, an atomic symbol was included in the municipal coat of arms, due to the two reactors present in the newly formed town.

DCF77 is a German longwave time signal and standard-frequency radio station. It started service as a standard-frequency station on 1 January 1959. In June 1973 date and time information was added. Its primary and backup transmitter are located at 50°0′56″N 9°00′39″E in Mainflingen, about 25 km south-east of Frankfurt am Main, Germany. The transmitter generates a nominal power of 50 kW, of which about 30 to 35 kW can be radiated via a T-antenna. DCF77 is controlled by the Physikalisch-Technische Bundesanstalt (PTB), Germany's national physics laboratory and transmits in continuous operation (24 hours). It is operated by Media Broadcast GmbH (previously a subsidiary of Deutsche Telekom AG), on behalf of the PTB. With Media Broadcast GmbH, a temporal transmission availability of at least 99.7% per year or under 26.28 hours of annual downtime has been agreed upon. Most service interruptions are short-term disconnections of under two minutes. Longer lasting transmission service interruptions are generally caused by strong winds, freezing rain or snow-induced T-antenna movement. This manifests itself in electrical detuning of the antenna resonance circuit and hence a measurable phase modulation of the received signal. When the maladjustment is too large, the transmitter is taken out of service temporarily. In the year 2002, almost 99.95% availability, or just over 4.38 hours of downtime, was realized. The timestamp sent is either in Coordinated Universal Time (UTC)+1 or UTC+2 depending on daylight saving time.The highly accurate 77.5 kHz (3868.2897806 m wavelength) carrier signal is generated from local atomic clocks that are linked with the German master clocks at the PTB in Braunschweig. The DCF77 time signal is used for the dissemination of the German national legal time to the public.Radio clocks and watches have been very popular in Europe since the late 1980s and, in mainland Europe, most of them use the DCF77 signal to set their time automatically. The DCF77 longwave radio emission offers penetration into buildings and the time-transmissions can be received by small ferrite antennas incorporated in the case of radio-controlled low-cost time keepers without the help of exterior antennas. The accuracy of the DCF77 amplitude-modulated time signals suffices for the every-day use of clocks and watches by consumers where primarily the long-term accuracy matters. Further industrial time-keeping systems at railway stations, in the field of telecommunication and information technology, and at radio and TV stations are radio-controlled by DCF77 as well as tariff change-over clocks of energy supply companies and clocks in traffic-light facilities.

Mainhausen is a municipality of over 9,000 in the Offenbach district in the Regierungsbezirk of Darmstadt in Hesse, Germany.

Gersprenz is a river that starts in the Odenwald, Hesse and flows into the river Main near Aschaffenburg, Bavaria, Germany. Including its source river Mergbach, it is 62.1 km (38.6 mi) long, without the Mergbach it is 51.3 km (31.9 mi) long.