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An amateur radio propagation beacon is a radio beacon, whose purpose is the investigation of the propagation of radio signals. Most radio propagation beacons use amateur radio frequencies. They can be found on LF, MF, HF, VHF, UHF, and microwave frequencies. Microwave beacons are also used as signal sources to test and calibrate antennas and ...
Baked beans is a dish traditionally containing white common beans that are parboiled and then baked in sauce at low temperature for a lengthy period. [1] Canned baked beans are not baked, but are cooked through a steam process. [2] Baked beans originated in Native American cuisine, and are made from beans indigenous to the Americas. [3]
These islands of intense ionization are called "sporadic E" and result in erratic but often strong propagation characteristics on the "low[er] band" VHF radio frequencies. The 6 metre amateur band falls into this category, often called "the magic band", will often "open up" from one small area into another small geographic area 1 000–1 700 km ...
Submillimeter amateur radio refers to Amateur radio activity in the sub-millimeter region (275 GHz to 30 THz) of the electromagnetic spectrum. While no international frequency allocations exist for amateur radio in the sub-millimeter region, a number of administrations permit radio amateurs to experiment on Terahertz frequencies.
An assortment of crockery in which beans are baked, including a souvenir-style Boston Baked Beans beanpot Baked beans served with Boston brown bread. Boston baked beans are a variety of baked beans, sweetened with molasses, and flavored with salt pork or bacon. [1] [2] [3]
Data shared via radio or Internet are collected by all users and can be combined with external map data to build a shared live view. APRS was developed from the late 1980s forward by Bob Bruninga, call sign WB4APR, a senior research engineer at the United States Naval Academy .
In the days of crystal-controlled radios, these pairs were identified by the last portion of the transmit (Input) frequency followed by the last portion of the receive (Output) frequency that the ham would put into the radio. Thus "three-four nine-four" (34/94) meant that hams would transmit on 146.34 MHz and listen on 146.94 MHz (while the ...
The 2-meter amateur radio band is a portion of the VHF radio spectrum that comprises frequencies stretching from 144 MHz to 148 MHz [1] in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) [2] [3] and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa, and Russia).
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