A picture says a 1000 words.. this is an ancient mixer on e-bay recently, I have one for experimentation. It…

Worryingly, there are comments here: http://www.eham.net/articles/24502  that are simply wrong, and cause a lot of confusion to people trying to…

Since these are so hard to find, I’m going to record all findings. According to a 1961 document called Plastic-Film-Dielectric…

PTFE has a more constant (!) dielectric constant over a reasonable frequency range (not that the 4 ohms delta of…

Since the steps were too much, this excel file was created. In the spreadsheet, the green values can be entered,…

For constructing transmission lines, coax is useful because it is available in 50 and 75 ohms. For transmission line transformers,…