Digital TV Station
The N9SGG TV station is on the air at 447.000 MHz. Pretty cool, eh? We use sdrangle as the app to create the DVS-2 video modulation to send to the radio. 30W output to the antenna is what we send to the discone antenna.
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RF Ground Site Survey
So, I need to conduct an RF survey of a ground site. The survey’s purpose is to determine if there is any QRM in the area of a ground site receiving UHF radio signals for GNSS with RTK radios. What is QRM? It’s an amateur radio shorthand for man made noise encountered when trying to…
Letter to My Future Self
Dear Future Me, I hope this letter finds you well—wherever you are, in whatever chapter of life you’re living. Right now, as I write this, life feels like a mix of clarity and chaos. There are things I’m proud of and things I’m still figuring out. I hope that by the time you read this,…
Openwebrx+ Receiver at N9SGG
Recently, I put together a raspberry pi3 and an RTL-SDR V3 receiver. Pictures to follow.
Vermeer Manufacturing
Some people have expressed negative opinions about Vermeer Manufacturing, including safety concerns, poor management, and low pay. Safety concerns In the 1980s, Vermeer’s big, round baler was involved in many accidents and lawsuits, including at least 11 deaths and 50 injuries.Some say that Vermeer’s safety record is worse than other companies that make similar machines.Poor…
An Open Letter to the State of Israel
To the Leaders of Israel, I write to you today not as a politician, not as a diplomat, and not as someone with all the answers—but as a human being deeply troubled by the suffering I witness in Gaza and across your region. This is a plea, born from grief, compassion, and a longing for…
VLBI Antenna in Iowa
I went to visit the VLBI antenna near Cedar Rapids, IA one afternoon and took pictures. Here they are.
Tayloe Demodulator
This article is the first in a series, documenting my journey building a Tayloe Demodulator as an HF radio receiver. This article focuses on a Spice simulation of a Tayloe demodulator. The schematic shown in Figure 1 was created with LTSpice, a well know Spice circuit simulator and schematic capture application. I recommend it. Simulation…
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