We rank the products, but the links to Amazon are promotional.
This type is wire is fairly standard and made of high-grade copper core. You use it in your homes and businesses when you wish to connect a computer to another computer or the Internet router.
Since we live in a technological era, almost everyone must have, or at least have heard of CAT5e networking wire. Litz wireįor medium wave coverage, I usually use the cheapest and most readily available wire that has become a standard these days.
#FERRITE CORE INDUCTOR AMAZON 1.5 UH FREE#
If you have a variable capacitor not listed in the table, then feel free to contact me and I shall try to add it onto the list. If your variable capacitor is insufficient, then you will need a larger coil, which equates to more coil, more turns, longer ferrite rod, and ultimately more money. As the variable capacitor gets bigger in value, the required coil gets smaller hence, that is where the trade-off is. The third column shows the number of turns required of solid core (CAT5e) wire on a 10-mm diameter ferrite rod. Here is a table that shows some commonly available variable capacitors with their values in pF together with the required coil value for the reception of the medium wave band. Therefore, please consider these values a rough rule of thumb for anyone who does not have an LCR meter. In addition, there are different manufacturers making ferrite rods using different formulas. The values shown in the table below (for MW coverage) are approximate because there is bound to be variance in CAT5e cable formula from one manufacturer to another. With the use of the calculators in the following pages, you should be able to build an accurate coil for almost any variable capacitor value. If the capacitor value is slightly less, then they usually increase the number of turns in the coil. Therefore, as a general rule of thumb, radio engineers tend to design their tank circuits around 300-µH coil and 300-pF variable capacitor. Radio engineers usually like to build a coil that is approximately 300-µH in value, because it requires a variable capacitor that ranges in value from 32-pF to 304-pF.
Let us assume that we wish to design a coil with an approximate operating range of 526.5-kHz to 1606.5-kHz in the medium wave band. This article takes the guesswork out of building a coil, and shows how you could calculate the values to design and build an accurate tank circuit. Designing an AM radio ferrite rod antenna coil (also known as tank circuit) for a crystal radio project or any radio project is something GCSE students and hobbyists love rushing into with guesswork.