Showing posts with label hamradio. Show all posts
Showing posts with label hamradio. Show all posts
Thursday, July 22, 2021

On calibrating up a ubitx, or "why the hell is this so complicated"

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 I've built a few of ubitx/bitx40 radios over the last couple years. I built one of each for me, and a couple for other hams. The bigges...
Friday, July 24, 2020

RFI from crappy electronics, or "how's this sold in the US?"

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I picked up a cheap charging cable for my Baofeng UV-9S. ( https://www.amazon.com/gp/product/B07TSDSQ4Z/ ). It .. well, it works. But it m...
Sunday, November 3, 2019

HF phasing noise eliminators, or "wow ok this mostly works"

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I have a long standing issue with noise from a neighbour down the road that generates super wideband noise on the HF and low VHF bands. It...
1 comment:
Sunday, July 15, 2018

Restoring a TS-430S, or "dry joints and stray RF: a tutorial"

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I recently acquired a TS-430S HF transceiver. The seller claimed the FM board and full complement of filters worked, but no display, buttons...
11 comments:
Tuesday, October 10, 2017

FreeBSD and APRS, or "hm what happens when none of this is well documented.."

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Here's another point along my quest for amateur radio on FreeBSD - bring up basic APRS support. Yes, someone else has done the work, but...
Monday, September 11, 2017

Fixing up TS-440s rigs

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I've been teaching myself HF electronics and antennas lately. I thought I'd go write down some of the things I came across whilst ti...
Monday, June 5, 2017

gqrx, direct sampling configuration, shortwave/AM reception, etc

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This is one of those articles that I write specifically to, you know, not forget it the next time. I picked up a v3 RTL-SDR dongle from ht...
Sunday, May 7, 2017

gqrx on freebsd

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I'm still tinkering with my own SDR code in C, but I decided I'd give gqrx a go. It sports a simple UI to visualise things as well a...