First at what frequency does this effect starting place.
and if you double the frequency does it means that the core of the cable that dosn't transport the electrons get linear bigger.
I don't know the relationship, but it is dependent on the material the conductor is made of (higher frequencies can travel deeper in gold than they can copper, and they can travel deeper in copper than aluminum).
Probably not a good idea. Materials that make the best conductors usually don't make very good pipes and materials that make the best pipes usually aren't very good conductors. Plus, a pipe carrying something has to be thick enough to be strong which means it has to be thick which robs a lot of surface area. A stranded wire would be more effective.and what if we use a metal pipe as (cable) is it an idea to cool it with a liquid (oil is a not conducting cooling liquid)
??? It works at all frequencies. Higher frequency components of the electrical current won't be able to use as much of the conductor's cross section to flow as much as the lower frequency components can. Physics does not care if it is pure DC (0Hz), pure AC (>0Hz), or AC with a DC bias. Each frequency component is treated separately.second does it only work with AC or do we also have this effect with a DC voltage with a varying top value
What does the bolded section mean? Are you familiar with fourier analysis? Because that question does not make a lot of sense...varying voltage means AC. Do you just mean an AC signal with a DC bias?
Well, sorry to say, it is not a new idea. Ever hear of microwave pluming? Flexible pipes are often used in very frequency and often times the pipes are filled with gas that will not readily condensate with temperature changes. Even moister will cause standing waves in these wave guides used as transmission line.
Yes skin effect is more & more critical as the frequency increases. This is why the PCB layout is also critical. I mean the layout is everything. You can even make filters by doing your layout certain ways. Not just comb filters, but the angles of the trace as well.
yes i wired an RIAA preamp following the PCB layout but still ended up with a radio instead of a preamp....
What do you mean, a "radio"? You mean an oscillator?
nope I could actually hear very faintly speech ! don't know what language it was in though
However like i said what i got sounded foreign to me (foreign that is to both english and italian) so it was not local. I've lost the schematic of the preamp but it was just a normal RIAA preamp. the instructions were clear that it had to be a PCB, not having access to the equipment I did it on matrix board (not the strip kind) and ran transformer wire in the positions that the PCB layout showed, still i was unable to make it work, I just got this weird radio tansmission. it was also coupled to a small power amp with perhaps more cable than recomended so its no wonder starnge things took place.
well i was living in italy at the time and to my knowledge there were no local broadcaster minus the probably illegal transmissions from "radio maria" in the church about 4 miles away. I'm pretty sure they were transmitting as when I walked behind the church with my portable radio (in later years I lived closer to it) I could only pick up that station no matter what i tuned to.
However like i said what i got sounded foreign to me (foreign that is to both english and italian) so it was not local. I've lost the schematic of the preamp but it was just a normal RIAA preamp. the instructions were clear that it had to be a PCB, not having access to the equipment I did it on matrix board (not the strip kind) and ran transformer wire in the positions that the PCB layout showed, still i was unable to make it work, I just got this weird radio tansmission. it was also coupled to a small power amp with perhaps more cable than recomended so its no wonder starnge things took place.
It could have been a powerful Shortwave broadcast. Hey, that was a good explanation from MrAl on skin effect. I liked that
It may have been a good design but the board could have caused stray capacitance or something of the sort to create a tank circuit. I wanted to see the schematic because you said it was a small circuit and sometimes accidents lie that could turn out to be something useful. My ears perk up when I hear anything about radio. I rarely get a chance to do anything with it anymore unless I do it myself.
Hello there,
Glad you liked it
I was thinking about throwing in some formulas too just in case
anyone wants to calculate a few examples or even something to
do with something they happen to be working on.
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