Wednesday, June 29, 2022

The use case for a blinking infrared LED

›
Many years ago at a company where I worked we had two sets of computer systems:  The ones that we used every day for engineering purposes, a...
Saturday, May 28, 2022

Fixing a TS-570G (The tuner couldn't find a match, timing out...)

›
The TS-570D's front panel  A couple of months ago I happened to be at a swap meet in Northern Utah and talking to a gentlemen - with who...
3 comments:
Saturday, April 30, 2022

Implementing the (functional equivalent of a) Hilbert Transform with minimal overhead

›
I recently had a need to take existing audio and derive a quadrature pair of audio channels from this single source (e.g. the two channels b...
Sunday, February 27, 2022

High power Tayloe (a.k.a. Wheatstone) absorptive bridge for VSWR indication and rig protection.

›
Figure 1:   The completed absorptive VSWR bridge. Last year, I was "car camping" with a bunch of friends - all of which happened t...
1 comment:
Saturday, January 22, 2022

Testing the FlyDog SDR (KiwiSDR "clone")

›
As noted in a previous entry of this blog where I discussed the "Raspberry Kiwi" SDR - a (near) clone of the KiwiSDR - there is a...
Friday, December 3, 2021

The case of the Clicky Carrier - Likely high-frequency trading (that can sometimes clobber the upper part of 20 meters)

›
Note:  As of 9 February, 2022, this signal is still there, doing what it was doing when this post was originally written. As of September, 2...
2 comments: