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#1
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![]() OK ... I have this nice brass pipe and fittings, a couple of copper disks ~6in.+ to solder at the ends, etc. Now, if I construct this tank for, say 10m, and it is ~28-32 inches in physical length, and tuned with a cap at the end, how can I know where the standing waves are/is? Should I "picture" this as if it were a real 1/4 wave at 10m, and the wave is "compressed?" ... Your best ideas? Knowledge? What the heck did those gurus' say in their books? I mean, I am going to have to drill a hole or two to get that 1 turn loop in their to couple to something ... I have gotten to this point, I thought it would be apparent ... need some help. Without having to admit you are not a guru, got any pointers? A friend in need ... I think they (the standing waves) are going to be trapped in there though :-) Got any ideas? I mean, just help getting me started ... [pictures will follow at a later date to get us "all on board."] Regards, JS |
#2
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John Smith wrote:
[...] Come to think of it, maybe I'd better "down scale" this and go 144Mhz or higher, and shoot for a full wave length in physical size ... hmmm??? Got the copper, got the time, got the drive ... JS |
#3
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John Smith wrote:
John Smith wrote: [...] Come to think of it, maybe I'd better "down scale" this and go 144Mhz or higher, and shoot for a full wave length in physical size ... hmmm??? Got the copper, got the time, got the drive ... JS Oh geesh, this is much more interesting than I first imagined. I could "lump" the inductances in turns at one end of the "pipe", or in the middle--for example, or "stretch" it (helical wound) over the whole length of the "tube", however, in attempting to "view" it, I think I may need the higher freqs--where the physical dimensions will "force" the truth ... Cecil! Your ideas? D*mn man, where are you, and your books, when I need you? Regards, JS |
#4
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John Smith wrote:
[chit] Well, d*mn man, your ideas? Yanno, anyones ideas will be examined here--I don't need gurus', I'll listen, if it works--I'll let 'ya know--if it doesn't, we'll try somethin' else--but then, I suspect, you already knew that ... krist, even if we are wrong--big deal--we'll try the next idea--won't we ... Warm regards, JS |
#5
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John Smith wrote:
Now, if I construct this tank for, say 10m, and it is ~28-32 inches in physical length, and tuned with a cap at the end, how can I know where the standing waves are/is? Should I "picture" this as if it were a real 1/4 wave at 10m, and the wave is "compressed?" ... Your best ideas? All that is required to achieve resonance in a distributed network is that (in phasor notation) (Vf+Vr)/(If+Ir) be purely resistive. Use your imagination to figure out if that always implies 90 degrees. -- 73, Cecil http://www.w5dxp.com |
#6
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John Smith wrote:
Well, d*mn man, your ideas? My idea is to spend as much time as possible with a beautiful blond teacher who doesn't have to go back to work for another few days. -- 73, Cecil http://www.w5dxp.com |
#7
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Cecil Moore wrote:
John Smith wrote: Well, d*mn man, your ideas? My idea is to spend as much time as possible with a beautiful blond teacher who doesn't have to go back to work for another few days. LOL! Krist, my wife would kill me! I do love her too ... :-P JS |
#8
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John Smith wrote:
[...] A trip to the metal scrappers turned up a couple tubes, ends, disks ... maybe next weekend can do something with it all ... if you are on dialup, the image may take a bit to load. http://assemblywizard.atwebpages.com JS |
#9
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On Dec 31, 1:07*am, John Smith wrote:
John Smith wrote: [...] A trip to the metal scrappers turned up a couple tubes, ends, disks ... maybe next weekend can do something with it all ... if you are on dialup, the image may take a bit to load. http://assemblywizard.atwebpages.com JS I recall a website that used major sized hardline to construct a set of cans for 6M. |
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