Timeline for What dielectric strength is required for a variable capacitors in a 100W T-network antenna tuner?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Oct 26 at 22:58 | comment | added | Ryuji AB1WX | The T-network's operating (loaded) Q varies hugely depending on the load impedance. And the voltage across the capacitance can be quite large when the load impedance is high. There is no direct way to figure out the max voltage. A typical way to do that is to define the maximum SWR the tuner should be able to match, and on that constant SWR circle, find the worst point and then calculate the voltage across the capacitor. | |
| Apr 8, 2019 at 15:00 | history | tweeted | twitter.com/StackHam/status/1115268232934510593 | ||
| Apr 5, 2019 at 13:39 | history | became hot network question | |||
| Apr 5, 2019 at 12:32 | vote | accept | Aleksander Alekseev - R2AUK | ||
| Apr 5, 2019 at 12:29 | answer | added | Brian K1LI | timeline score: 4 | |
| Apr 5, 2019 at 11:22 | comment | added | Aleksander Alekseev - R2AUK | At the moment I have two antennas that require a tuner. The first one is a long wire antenna (23.5 meters + 8 meters counterpoise). The length was chosen so that the impedance should be relatively low on any band from 80 to 10m. The second one is a multiband (40-10m) inverted delta loop, 38 meters total length, the feed point is in one of the upper angles. It supposed to be about 120 Ohm on 40m, although I'm not certain about other bands. Also I would like to use a tuner for a multiband 7-10m long vertical antenna (fishing rod + tripod + wire + radials), although currently I don't have one. | |
| Apr 5, 2019 at 10:53 | comment | added | Brian K1LI | Need to know the impedance you will match to determine the voltage across the capacitors. Or, tell us about the antenna so we can estimate the impedance. | |
| Apr 5, 2019 at 10:31 | history | edited | Aleksander Alekseev - R2AUK | CC BY-SA 4.0 |
added 1 character in body
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| Apr 5, 2019 at 10:23 | history | asked | Aleksander Alekseev - R2AUK | CC BY-SA 4.0 |