Thursday, July 11, 2019

The world of variable capacitors (videos)

Variable capacitors are super-useful in radio. Whether it's the tuning control in a homebrew receiver, an adjustment in an antenna coupler or a receiver's preselector there may be a variable capacitor involved. They come in all shapes and sizes - from tiny trimmers for VHF to wide-spaced monsters for low frequency transmitting. 

 Here's a few videos about them.

All about variable capacitors

What to do if they stop making variable capacitors

Lower capacitance from a 2 gang variable capacitor

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