Timeline for answer to Does the inside surface of pipe material conduct significant RF current in small TX loop antennas? by Andy aka
Current License: CC BY-SA 4.0
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11 events
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| 7 hours ago | comment | added | user1847129 | "I don't do shifting goalposts." - well, I don't, actually.- Loop is in the title. A loop is not a straight pipe, at least where I come from. | |
| 8 hours ago | comment | added | user1847129 | At @TimWescott. It looked like you did answer my question in the way how I meant it, but now I am doubting it with all the confusion elsewhere, haha. Hence I updated the drawing in the OP. Does that still make it look how you took my question from the beginning? Sanity check for me :D | |
| 8 hours ago | history | edited | Andy aka | CC BY-SA 4.0 |
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| 8 hours ago | comment | added | Andy aka |
So, @user1847129 were your earlier comments aimed at me or someone else. I need definitive clarification. And, if aimed at TimW he won't be aware of your comments above. That's why we use @somebody to direct comments.
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| 9 hours ago | comment | added | user1847129 | @SamGibson you're right, but he also commented on the OP, where I mentioned it also. | |
| 10 hours ago | comment | added | SamGibson♦ |
@user1847129 - Hi, If you intended your comments to be seen by TimWescott then I'm not sure he will have received a notification, as you didn't include @TimWescott in the text. Therefore he may be unaware of them. || So if you intended to respond to his comment, I suggest you post one more comment e.g. @TimWescott Please see my replies to your comments above. to trigger a notification. || On the other hand, the answer's author Andy aka will have received a notification for your comments, but I doubt he was the intended recipient so he may ignore them. Can you clarify the addressee? TY
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| 11 hours ago | history | edited | Andy aka | CC BY-SA 4.0 |
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| 12 hours ago | comment | added | user1847129 | Also, it does not need to be shielded (which your description suggests), which is only a variant of it, but not the default. Most people simply use copper tubing to form a single turn loop, and a high voltage variable capacitor at the gap where the 2 ends meet. I could try to make a drawing some time later, if that helps. | |
| 12 hours ago | comment | added | user1847129 | No, not necessarily multi-turn at all. "Magnetic" refers to a property ascribed to a loop with a circumference of <= 1/10 lambda (a rule of thumb, I guess), of supposedly predominantly radiating magnetic component in the near field (a few wavelengths) and also receiving, Making it less prone to be influenced by metal stuff in the vicinity vs. mostly electrical antennas. Some even say it's less prone to receive electrical disturbances nearby. That's the lore anyway, partly disputed by some. The supposedly more technical term is "electrically small transmitting loop" | |
| 13 hours ago | comment | added | TimWescott | Andy, I think your model doesn't match what amateur radio enthusiasts call a "magnetic antenna" (and I think the question needs clarification). The "magnetic antenna" uses a multi-turn loop inside of pipe, which is interrupted at the antenna feed point, and grounded. According to the literature, this has the effect of shielding the antenna from the electric field, while leaving it as sensitive to the magnetic field as if the wire loop were unshielded. I don't see how you're modeling that here. | |
| 13 hours ago | history | answered | Andy aka | CC BY-SA 4.0 |