How to make your own variable tuning capacitor with a range of 5 pf to 27 pf this multi turn capacitor can be constructed using only six items. When i found out that i have no variable capacitor in my pile of junkscavenging one from an old radio was not an option.
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Since most of new radios uses analog tuning.
Make tuning capacitor. A tuning capacitor is a variable capacitor used in an electronic circuit of a radio. Air variable capacitor from scrap aluminum sheets. Scavenging one from an old radio was not an option.
Make your own simple vhf tuning capacitor. For those who enjoy building radio projects you may have noticed that variable capacitors are not as available as they once were. I was building a crystal set for my son but it came to a halt.
I have read an article once about building an air variable capacitor. The equation of a plate capacitor is. There are many uses and applications for a variable capacitor.
And the ones with air variable capacitors are very rare and are collectors item. C02248kad where k is dielectric constant most plastics its 24 a is the area of one plate in square inches and d is the distance between the 2 metal plates in inches voltage breakdown is about 600volts per 0001 of an inch up to 0005 inch at which point the max voltage cant be exceeded by much. When i found out that i have no variable capacitor in my pile of junk.
Since most of new radios uses analog tuning. It usually connects in parallel to a loop antenna. There was a time when all radio receivers contained at least one but with the arrival of the varicap diode and frequency synthesizer the traditional.
And the ones wit. The most typical use is in an am radio circuit. Project on howto make diy variable tuning capacitor for those who enjoy building radio projects you may have noticed that variable capacitors are not as available as they once were.
If you enjoy building radio projects you may have noticed something slightly worrying over the last few.
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