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14

Reasons for using aluminium wire in a CRT degaussing harness: The lower electrical conductivity of aluminium (only 63% that of copper) would be good enough for the degaussing application. The lower density of aluminium (only 30% that of copper) would make the harness lighter and easy to handle. The lower weight combined with the lower cost of aluminium ...


22

In consumer electronics there is only one reason. Price Saving 10c on a run of 100,000 devices saves $10,000 the degausing coil doesn't need to be compact or have to low skin-effect losses so there's no compelling reason not to use aluminium.


5

No it won't pick anything up as you saw. In any direction and, in any prevailing magnetic field, the lines of flux will concentrate in two halves of the ferrite in the same direction and, you will get cancelling voltages induced: - Thus, flux entering from the left will congregate in the shorter paths and use the ferrite core to do so. This will produce ...


1

It's a 125 kHz transmit loop antenna for RFID applications which would need a typical range of around 100 mm that could go up to 300 mm or even 2000 mm in industrial applications. When used for other applications, the range would depend on the transmitter output power and on how well the antenna could be matched to the transmitter output. The maximum signal ...


2

Although this is labeled an "antenna", it's really an RFID coil, like you see in those pedestals surrounding a store entrance. RFID systems operate in the "near field" which extends at most a few coil diameters away. It will not radiate efficiently enough to send a signal to a distant location at the 125 kHz frequency. It takes something ...


0

Answering because the real question is starting to emerge in the comments. These will go away eventually, so please edit the question to ask the real question. How do I design an inductor to hit a specific self- resonant frequency without thermal drift? Now... You'll get temperature drift in the coil itself. Thermal expansion will change its dimensions, ...


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