The 3 Best Things about making GHz Coaxial Filters - Design and Machining part 2

Coaxial microwave filters have a gorgeously elegant mechanical design that makes them perfect to make in my home machine shop on my manual lathe and milling machine. I designed this one to suppress unwanted harmonics from a powerful 1.3 GHz/23 cm band amplifier.
Lots of fixturing and machining of tiny parts from Tellurium Copper, plus a deep(ish) dive into what a low pass filter is for and how they are designed and modelled. No complex maths, that's for my second channel if I ever get round to making it!
Playlist of the full series is at • 1.3 GHz Coaxial Low Pa...
AIMEE, my Artificially Intelligent Machining and Engineering Expert system gets a new voice synthesizer, and she's grumpy about it. How very surprising!
As usual, I bring out my Colchester 1800 manual lathe and 1962 Bridgeport milling machine, along with a range of software tools.
Part 1 of this series is at • Machining Microwave Co...
Power curve graphic: assets.wolfspeed.com/uploads/...
Attributions:
en.wikipedia.org/wiki/Phase_v...
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unsplash.com/@larskienle cable image
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Music: Corncob by Kevin Macleod is licenced to RUclips
Contents:
00:00 Why, oh why???
02:50 Spacers
05:44 How filters work
11:05 Ends
16:31 Slots
19:38 Skin Effect
23:54 Pins