Justin K5EM

@k5em.com

380 Followers 272 Following

Tech, ham radio, hacking, weather. Enjoy SDR, antennas, contesting, satcom. HW/FW/SW engineer mapping with drones. He/him. http://satmatch.com also @k5em@mastodon.radio

Two men are smiling outdoors on a sunny day with mountains in the background. The man on the left has gray hair and a short beard, wearing a colorful patterned shirt. The man on the right is wearing a gray hoodie and a dark baseball cap with a round multicolor patch. They’re standing on a dirt trail overlooking a wide valley filled with trees and a distant city, with tall, rugged mountains rising behind them under a clear blue sky.

KZ1W claimed score chart for CQWW WPX contest. Shows the most points on 21, 7, and 28 MHz. Overall 2463 QSOS for 6049 QSO points and 977 Prefixes for a claimed score of 5,909,873.

Graph of QSOs between England and Alaska in Clublog for the month of December, showing peak around 1000-1100 UTC and 1600-1700 UTC

Screenshot of my websdr receiver here in Seattle showing 0-30MHz with a ton of radio noise across the whole spectrum, presumably from local christmas decorations.

SotaCAT, a small orange elongated cube, is plugged into the side panel of an Elecraft KX3 amateur radio transceiver.

This picture captures the stunning view of Mount Rainier and Lake Washington during sunrise. The lake in the foreground is calm, with soft ripples reflecting the warm light of the sky. The shoreline beyond the water is lined with dense, dark trees, partially obscured by a thin layer of mist rising in the early or late hours of the day.

Mount Rainier stands majestically in the distance, its snow-covered peak glowing faintly against the warm tones of the sky. The sky itself is a breathtaking palette of orange, pink, and red, with streaky clouds stretching across it, creating a sense of depth and tranquility. The overall mood is serene and awe-inspiring, highlighting the beauty of the natural landscape.

I am outdoors in a forested area, sitting on the ground and smiling at the camera. I am wearing a puffy blue jacket and have some equipment in front of them, including a notebook and a small case with, with an Elecraft KX2 on my left knee. Next to me is a fluffy white and black dog is sitting, looking off into the distance. The background is lush with mossy trees, ferns, and fallen leaves, creating a peaceful, natural setting.

Spectrogram showing more blips and bloops.

This image is a polar azimuthal map focusing on Southeast Asia and surrounding regions. It shows geographic areas like China, Japan, the Philippines, Indonesia, Thailand, Vietnam, and Australia, which are labeled and outlined in black. The map uses a blue color to represent the surrounding bodies of water, such as the South China Sea and the Pacific Ocean. Latitude and longitude lines are displayed around the curved edges of the map, with degree markers running from 240° to 310°. The map provides a detailed view of countries and major islands in this part of the world, centered on Southeast Asia.

This image shows a row of large blue industrial machines labeled "HIPOWER PVC welding machine" arranged in a spacious and well-lit manufacturing facility. The machines are lined up in a neat, organized manner, each equipped with control panels and welding platforms. The setting has a clean, white interior with high ceilings and overhead lighting. The floor is smooth and gray, and the atmosphere suggests a modern production environment. The text "HIPOWER PVC welding machine" is overlaid in a yellow box at the bottom of the image.

This image depicts a person operating a large industrial machine labeled "HIPOWER HF PVC welding machine." The machine has a robust, rectangular design with various control buttons and a prominent welding area in the center. The person, wearing a dark shirt, is standing to the right of the machine, using their hands to position or adjust material on the welding platform. The surroundings suggest an industrial or manufacturing environment, with boxes and other equipment visible in the background. The text "HIPOWER HF PVC welding machine" is overlaid near the bottom center of the image.

A spectrogram of an ionosonde, where showing a slanted line as the sonde changes frequency linearly with time, as well as many signals that make mostly vertical green and red lines on a blue background.

This image is another spectrogram showing a frequency spectrum over a range of 26.75 MHz to 27.45 MHz, indicated along the top. The background is mostly dark blue, with vertical lines and patterns in bright blue, green, yellow, and red, representing the strength of signals at different frequencies. Stronger signals are shown in brighter colors, with red and yellow indicating particularly intense signals, and blue or green indicating weaker ones. The spectrogram illustrates the varying intensity of frequencies over time. In the background barely above the noise floor we can see a number of these fish hook shaped signals.

An image of a spectrogram, which is a visual representation of the spectrum of frequencies of a signal as it varies with time. The top part of the image shows a waveform or frequency spectrum in a green line graph, with frequency peaks marked. The bottom part of the image consists of a heat map in shades of blue, green, yellow, and red, representing the intensity of various frequencies over time. Brighter colors indicate stronger signals, while darker areas represent weaker signals or noise. Most of the signals in the waterfall are more or less straight lines, but some signals, mostly between 26.8 and 27.8 megahertz, change frequency rapidly with time. The imprints they make on the waterfall have been called "S"s or "Fish hooks" because of their shapes.