Morse Code Memory Aid Morse code was invented in 1837 by Samuel Morse. Morse code is a very early digital telecommunications method. The code consists of short dits • and longer dahs –. The combination of the dits and dahs forms letters. Initially, telegraphers used Morse code over long wire lines that crossed continents and, […]
Do you have something negative from your past? Do you have something negative from your past? Do you have something that others need to see? Are you confused? I am writing about film negatives. The 20th century was dominated by photographic film. Photographic film was valuable, and after Kodak invented the digital camera, they suppressed
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Many years ago, in the 1990s, the digitization of images started. In the 1990s, people used film and slides for photographs. Digital photography was in its infancy. The photos below represent images I scanned using a drum scanner from Crosfield Electronics.
Infrared Photos Infrared (IR) photographs are images captured using infrared light, which has a wavelength longer than visible light. Unlike visible light, which is absorbed by most surfaces, infrared light can penetrate through some materials, such as clouds, fog, and vegetation. As a result, infrared photographs often reveal details and features that are not visible
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Infrared digital photography is a technique that involves capturing images using infrared light. This light is not visible to the naked eye, as it has a longer wavelength than visible light. To capture infrared images, specialised cameras and lenses are required. One of the main benefits of infrared photography is that it can produce some
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Purpose Supply power to a thermal typewriter for use during power outages. Power Power is supplied from four 12-volt panels connected, in series, to a charge controller. The solar panels’ potential 96-volt power is converted to 24-volt power to charge two 12-volt 100 Amp⋅hour marine batteries in series. Power Plan Two 15-meter sections of an
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Calculate Distance and Bearing Distance is the measure of the space between two points, often measured in kilometres, miles or nautical miles. Bearing is the measure of the direction of one point relative to another, usually measured in degrees. To calculate the distance between two points, you can use the Haversine formula: a = sin²(Δlat/2)
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Intro This posting will cover Winlink’s Radio Peer-to-Peer (P2P) messaging. Covered here is the Winlink Express software. Definition Peer-to-Peer (P2P) messaging differs from the regularly accustomed Winlink messaging system. The Winlink messaging method relies on an RMS Gateway to be connected to the internet, and messages are delivered via Winlink’s application running in Amazon Web Services (AWS). The
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SCS and Signalink Switch Box Purpose Provide an easy way to switch between the SCS DR-7600 Pactor Modem and the Signalink USB sound card system for use with the Yaesu FT-897 transceiver. CAT Connector Data Connector Data Connector SCS DR-7600 Pactor Modem Computer connection: Bluetooth Radio Connection: Eight-pin mini-DIN CAT cable and six-pin mini-DIN data
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GMRS and FRS Defined General mobile radio service (GMRS) and family radio service (FRS) are two radio services in the ultra-high frequency (UHF) radio band. GMRS radio service requires a license in the United States, and FRS is license-free. GMRS and FRS share the same frequencies except for the GMRS repeater inputs. Operation GMRS and
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