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#1
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The earth
Szczepan Bialek wrote:
So the earth is necessary in your radio for the static reasons. In my also: "In the lower half of the mast, there was a vertical steel tube, attached to the mast's outer structure with large insulators. This tube was grounded at the bottom, and connected electrically to the mast structure by an adjustable metal bar at 328 metres.[2] This technique allowed adjusting the impedance of the mast for the transmitter and worked by applying a DC ground at a point of low radiofrequency voltage, to conduct static charge to ground without diminishing the radio energy. Static electrical charge can build up to high values, even at times of no thunderstorm activity, when such tall structures are insulated from ground. Use of this technique provides better lightning protection than using just a spark gap at the mast feed, as is standard at most mast radiators insulated against ground." From: http://en.wikipedia.org/wiki/Warsaw_radio_tower It seems to me that the same reasons were in Marconi times. You have a big problem with comprehending, don't you? Earlier you wrote that Marconi said that a capacitive coupling to ground was good for HF grounding and now you want DC coupling to discharge static electricity. Those two reasons for grounding are completely different. So I repeat my question: Why do you repeat your question? It has been answered so many times already. |
#2
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The earth
"Rob" napisal w wiadomosci ... Szczepan Bialek wrote: So the earth is necessary in your radio for the static reasons. In my also: "In the lower half of the mast, there was a vertical steel tube, attached to the mast's outer structure with large insulators. This tube was grounded at the bottom, and connected electrically to the mast structure by an adjustable metal bar at 328 metres.[2] This technique allowed adjusting the impedance of the mast for the transmitter and worked by applying a DC ground at a point of low radiofrequency voltage, to conduct static charge to ground without diminishing the radio energy. Static electrical charge can build up to high values, even at times of no thunderstorm activity, when such tall structures are insulated from ground. Use of this technique provides better lightning protection than using just a spark gap at the mast feed, as is standard at most mast radiators insulated against ground." From: http://en.wikipedia.org/wiki/Warsaw_radio_tower It seems to me that the same reasons were in Marconi times. You have a big problem with comprehending, don't you? Earlier you wrote that Marconi said that a capacitive coupling to ground was good for HF grounding and now you want DC coupling to discharge static electricity. Those two reasons for grounding are completely different. Each capacitor has the big surfaces and imperfect insulator between them. Is it the "DC coupling to discharge static electricity"? " You have a big problem with comprehending, don't you?" S* |
#3
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The earth
Szczepan Bialek wrote:
"Rob" napisal w wiadomosci ... Szczepan Bialek wrote: So the earth is necessary in your radio for the static reasons. In my also: "In the lower half of the mast, there was a vertical steel tube, attached to the mast's outer structure with large insulators. This tube was grounded at the bottom, and connected electrically to the mast structure by an adjustable metal bar at 328 metres.[2] This technique allowed adjusting the impedance of the mast for the transmitter and worked by applying a DC ground at a point of low radiofrequency voltage, to conduct static charge to ground without diminishing the radio energy. Static electrical charge can build up to high values, even at times of no thunderstorm activity, when such tall structures are insulated from ground. Use of this technique provides better lightning protection than using just a spark gap at the mast feed, as is standard at most mast radiators insulated against ground." From: http://en.wikipedia.org/wiki/Warsaw_radio_tower It seems to me that the same reasons were in Marconi times. You have a big problem with comprehending, don't you? Earlier you wrote that Marconi said that a capacitive coupling to ground was good for HF grounding and now you want DC coupling to discharge static electricity. Those two reasons for grounding are completely different. Each capacitor has the big surfaces and imperfect insulator between them. Is it the "DC coupling to discharge static electricity"? No. |
#4
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The earth
Szczepan Bialek wrote:
Each capacitor has the big surfaces and imperfect insulator between them. Wrong. Is it the "DC coupling to discharge static electricity"? Usually that and nothing more. Marconi was WRONG. Marconi was WRONG. |
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