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#1
March 1st 05, 02:44 AM
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How can I measure or observe my hf antenna's take off angle?
Using a Hustler 5-BTV ground mounted with 72 radials. I have heard about
antenna modeling but is there any way to do a real world take off angle measurement??? -- Charlie Ham Radio - AD5TH www.ad5th.com Live Blues Music www.492acousticblues.com |
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#2
March 1st 05, 03:23 AM
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"Charlie" wrote
Using a Hustler 5-BTV ground mounted with 72 radials. I have heard about antenna modeling but is there any way to do a real world take off angle measurement??? It will take a lot of thrust, that 5-BTV might require 2 propane tanks ;-) Be sure to disconnect the radials first! Sorry, couldn't resist that. Jack |
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#3
March 1st 05, 03:27 AM
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Charlie wrote:
Using a Hustler 5-BTV ground mounted with 72 radials. I have heard about antenna modeling but is there any way to do a real world take off angle measurement??? Sure, just rent a helicopter and make field strength measurements. -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
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#4
March 1st 05, 01:03 PM
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wind a small RX i.e.: a field strength coil and LED indicator, or buy one of
them cheap 'bug detectors', stick on a gas filled WX balloon, get a hand held radio or mobile phone, and place a RX next to the radio Mic, put your radio on VOX and key from out side, by talking into the hand held, drag the balloon round with long a string observing the bug detector as a led field strength meter by viewing the LED barographs twinkling light, with a binocular. Easier at night. |
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#5
March 1st 05, 02:10 PM
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Thanks for all those helpful remarks..I have the LED ready along with the
balloon. I really liked the helicopter idea....you guys are so helpful!! LOL!!! -- Charlie Ham Radio - AD5TH www.ad5th.com Live Blues Music www.492acousticblues.com wrote in message ... wind a small RX i.e.: a field strength coil and LED indicator, or buy one of them cheap 'bug detectors', stick on a gas filled WX balloon, get a hand held radio or mobile phone, and place a RX next to the radio Mic, put your radio on VOX and key from out side, by talking into the hand held, drag the balloon round with long a string observing the bug detector as a led field strength meter by viewing the LED barographs twinkling light, with a binocular. Easier at night. |
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#6
March 3rd 05, 01:39 PM
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"Cecil Moore" Charlie wrote: Using a Hustler 5-BTV ground mounted with 72 radials. I have heard about antenna modeling but is there any way to do a real world take off angle measurement??? Sure, just rent a helicopter and make field strength measurements. ============================== What use would he make of take-off angle if he ever gets to know it. |
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#7
March 3rd 05, 01:47 PM
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Reg Edwards wrote:
"Cecil Moore" Sure, just rent a helicopter and make field strength measurements. What use would he make of take-off angle if he ever gets to know it. Maybe it would make him feel good? Sorta like your Cabernet? :-) -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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#8
March 4th 05, 01:22 AM
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Cecil Moore wrote:
Reg Edwards wrote: "Cecil Moore" Sure, just rent a helicopter and make field strength measurements. What use would he make of take-off angle if he ever gets to know it. Maybe it would make him feel good? Sorta like your Cabernet? :-) I want to measure the Cabernet of my antenna!!! - Mike KB3EIA - |
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#9
March 4th 05, 05:24 AM
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Reg
If he knew the TOA could he not ascertain the height of the reflecting layer using your "hop distance" program:. I suspect that your program on the same subject has a similar use so perhaps you could answer your own question. With my antenna having a TOA of 10 degrees I could work out backwards a whole mine of information all based around your program, assuming your input data is correct. Grin Cheers Art "Reg Edwards" wrote in message ... "Cecil Moore" Charlie wrote: Using a Hustler 5-BTV ground mounted with 72 radials. I have heard about antenna modeling but is there any way to do a real world take off angle measurement??? Sure, just rent a helicopter and make field strength measurements. ============================== What use would he make of take-off angle if he ever gets to know it. |
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#10
March 4th 05, 07:10 AM
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On Fri, 04 Mar 2005 05:24:23 GMT, "
wrote: With my antenna having a TOA of 10 degrees Hi Art, All antennas have a TOA of 10 degrees. That is possibly why Reggie (and others) generally advise that worshiping at the altar of TOA is illusory. Without some real data, like 0.2 dBi @ 10°, simply saying you have a TOA of 10 degrees is like trying to sell this wonderful car because it has brakes that work. 73's Richard Clark, KB7QHC |
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