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#1
May 29th 05, 04:52 AM
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On Sat, 28 May 2005 20:35:59 -0700, "John Smith"
wrote: This is a multi-part message in MIME format. Boring. I was wondering what the impedance the collapsed whip would present, and = Hi Brett, Depends on the frequency. EZNEC would answer that in a heartbeat. Given your preference for backing into problem, at 10MHz, at 1M in length, 1 - J 1Kohms. what sort or a balun/auto-transformer could be used between a longwire = (or other ant), gnd and the pull-up whip to improve reception... Aw c'mon now, Google will give you this in another heartbeat. ... anyone ever done any experimenting or unique ideas? Pons and Fleishman comes to mind - with many imitators.... 73's Richard Clark, KB7QHC |
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#2
May 29th 05, 05:11 AM
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Hmmm, I have googled Richard... but not found anything other than standard baluns/auto-transformers and all too boring methods of using them... and yes, I could go expermenting on my own with these--was mainly hoping someone has walked this path before and already gleaned the best method, or at least could get me ranting, raving and thinking!!! grin My bark is MUCH worse than my bite yanno....
I didn't mean what the capacitve reactance of the pull-up whip was--itself, I meant to mean the input impedance which the input at the bottom of that whip expected to see... It seems obivious they have provided some +J Ohms just past the bottom of that whip (or maybe not?)... however, input be high impedance and 1K+ ohms--and some non-reactive load could be assumed to be expected by it? Warmest regards, John "Richard Clark" wrote in message ... On Sat, 28 May 2005 20:35:59 -0700, "John Smith" wrote: This is a multi-part message in MIME format. Boring. I was wondering what the impedance the collapsed whip would present, and = Hi Brett, Depends on the frequency. EZNEC would answer that in a heartbeat. Given your preference for backing into problem, at 10MHz, at 1M in length, 1 - J 1Kohms. what sort or a balun/auto-transformer could be used between a longwire = (or other ant), gnd and the pull-up whip to improve reception... Aw c'mon now, Google will give you this in another heartbeat. ... anyone ever done any experimenting or unique ideas? Pons and Fleishman comes to mind - with many imitators.... 73's Richard Clark, KB7QHC |
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#3
May 29th 05, 05:16 AM
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Well, leave it to me--said that all wrong and only caught it on the re-read--which--naturally--I did AFTER posting...
I should have made it apparent that whatever ant I hook to it, will, of course--have to mimic that capacitive reactance you mentioned... Warmest regards, John "John Smith" wrote in message ... Hmmm, I have googled Richard... but not found anything other than standard baluns/auto-transformers and all too boring methods of using them... and yes, I could go expermenting on my own with these--was mainly hoping someone has walked this path before and already gleaned the best method, or at least could get me ranting, raving and thinking!!! grin My bark is MUCH worse than my bite yanno.... I didn't mean what the capacitve reactance of the pull-up whip was--itself, I meant to mean the input impedance which the input at the bottom of that whip expected to see... It seems obivious they have provided some +J Ohms just past the bottom of that whip (or maybe not?)... however, input be high impedance and 1K+ ohms--and some non-reactive load could be assumed to be expected by it? Warmest regards, John "Richard Clark" wrote in message ... On Sat, 28 May 2005 20:35:59 -0700, "John Smith" wrote: This is a multi-part message in MIME format. Boring. I was wondering what the impedance the collapsed whip would present, and = Hi Brett, Depends on the frequency. EZNEC would answer that in a heartbeat. Given your preference for backing into problem, at 10MHz, at 1M in length, 1 - J 1Kohms. what sort or a balun/auto-transformer could be used between a longwire = (or other ant), gnd and the pull-up whip to improve reception... Aw c'mon now, Google will give you this in another heartbeat. ... anyone ever done any experimenting or unique ideas? Pons and Fleishman comes to mind - with many imitators.... 73's Richard Clark, KB7QHC |
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#4
May 29th 05, 07:42 AM
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On Sat, 28 May 2005 21:16:48 -0700, "John Smith"
wrote: Well, leave it to me--said that all wrong and only caught it on the re-read--which--naturally--I did AFTER posting... I should have made it apparent that whatever ant I hook to it, will, of course--have to mimic that capacitive reactance you mentioned... Warmest regards, John "John Smith" wrote in message ... Hmmm, I have googled Richard... but not found anything other than standard baluns/auto-transformers and all too boring methods of using them... and yes, I could go expermenting on my own with these--was mainly hoping someone has walked this path before and already gleaned the best method, or at least could get me ranting, raving and thinking!!! grin My bark is MUCH worse than my bite yanno.... I didn't mean what the capacitve reactance of the pull-up whip was--itself, I meant to mean the input impedance which the input at the bottom of that whip expected to see... It seems obivious they have provided some +J Ohms just past the bottom of that whip (or maybe not?)... however, input be high impedance and 1K+ ohms--and some non-reactive load could be assumed to be expected by it? Warmest regards, John "Richard Clark" wrote in message ... On Sat, 28 May 2005 20:35:59 -0700, "John Smith" wrote: This is a multi-part message in MIME format. Boring. I was wondering what the impedance the collapsed whip would present, and = Hi Brett, Depends on the frequency. EZNEC would answer that in a heartbeat. Given your preference for backing into problem, at 10MHz, at 1M in length, 1 - J 1Kohms. what sort or a balun/auto-transformer could be used between a longwire = (or other ant), gnd and the pull-up whip to improve reception... Aw c'mon now, Google will give you this in another heartbeat. ... anyone ever done any experimenting or unique ideas? Pons and Fleishman comes to mind - with many imitators.... 73's Richard Clark, KB7QHC |
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#5
May 29th 05, 07:53 AM
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On Sat, 28 May 2005 21:16:48 -0700, "John Smith"
wrote: This is a multi-part message in MIME format. This is still boring. Well, leave it to me--said that all wrong and only caught it on the = re-read--which--naturally--I did AFTER posting... I should have made it apparent that whatever ant I hook to it, will, of = course--have to mimic that capacitive reactance you mentioned... And you had to post a 170 line message to pass on 4 lines of information? This goes from boring to lazy. The capacitive reactance comes free with the whip. You will drum up a 100 responses on what's better - what is odder is that all those great ideas haven't become ordinary after 50 years or more. And after, what, 17 - 18 years? no one's figured out how to power NYC with a Zippo's full of cold fusion either. Strange thing about invention - doesn't seem to work all the time (or worse, anytime). 73's Richard Clark, KB7QHC |
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