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Is this possible? Theroy question...
Is it possible to make a mobile 10m antenna that is
physically shorter than a 1/4 wave whip yet will preform better than a 1/4 wave whip? -- 73's es gd dx de Ken KGØWX Grid EM17ip, Flying Pigs #1055, Digital On Six #350, List Owner, Yahoo! E-groups: VX-2R & FT-857 |
On Wed, 13 Apr 2005 11:53:52 -0500, "Ken Bessler"
wrote: Is it possible to make a mobile 10m antenna that is physically shorter than a 1/4 wave whip yet will preform better than a 1/4 wave whip? Hi Ken, If you push more power through it. Aside from that, how much better is better? If you start out with a miserable quarterwave and replace it with a sterling (pun may be intended) shorter antenna; then, yes, the shorter one "may" be better. Why don't you first start by defining what efficiency your quarterwave whip exhibits? You may be surprised how hard it is to "better." 73's Richard Clark, KB7QHC |
NO
"Ken Bessler" wrote in message news:A8c7e.14295$up2.5543@okepread01... Is it possible to make a mobile 10m antenna that is physically shorter than a 1/4 wave whip yet will preform better than a 1/4 wave whip? -- 73's es gd dx de Ken KGØWX Grid EM17ip, Flying Pigs #1055, Digital On Six #350, List Owner, Yahoo! E-groups: VX-2R & FT-857 |
Ken Bessler wrote:
Is it possible to make a mobile 10m antenna that is physically shorter than a 1/4 wave whip yet will preform better than a 1/4 wave whip? Define "better". -- 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 =---- |
Fred W4JLE wrote:
"Ken Bessler" wrote: Is it possible to make a mobile 10m antenna that is physically shorter than a 1/4 wave whip yet will preform better than a 1/4 wave whip? NO I just ginned up a 5 foot tall antenna with 3.8 dBi gain. That's half the height and considerably more gain than a 1/4WL whip. With more time, I could do better. -- 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 =---- |
"Cecil Moore" wrote in message
... Ken Bessler wrote: Is it possible to make a mobile 10m antenna that is physically shorter than a 1/4 wave whip yet will preform better than a 1/4 wave whip? Define "better". -- 73, Cecil http://www.qsl.net/w5dxp I knew someone would ask that. Better: higher eirp for a 100w transceiver. -- 73's es gd dx de Ken KGØWX Grid EM17ip, Flying Pigs #1055, Digital On Six #350, List Owner, Yahoo! E-groups: VX-2R & FT-857 |
Ken Bessler wrote:
Better: higher eirp for a 100w transceiver. So how does 3.8 dBi gain from a five foot tall antenna sound? -- 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 =--- |
I am sure you did Cecil, however I understood the question to be a shorter
single element mobile antenna. I suspect he was looking at the shorter loaded antennas with gains far in excess of your paltry 3.8 dBi. See any CB site for examples. One loaded antenna is touted as having 7.2 dB gain. but then again it was a "super coil" rated for 10,000 watts. Other than that, "The angels have left the pinhead". "Cecil Moore" wrote in message ... Fred W4JLE wrote: "Ken Bessler" wrote: Is it possible to make a mobile 10m antenna that is physically shorter than a 1/4 wave whip yet will preform better than a 1/4 wave whip? NO I just ginned up a 5 foot tall antenna with 3.8 dBi gain. That's half the height and considerably more gain than a 1/4WL whip. With more time, I could do better. -- 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 =---- |
Fred W4JLE wrote:
I am sure you did Cecil, however I understood the question to be a shorter single element mobile antenna. Well, that's why I asked for a definition of "better". And he didn't say a "single element" was better so a 10-element beam might be the way to go. :-) -- 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 =--- |
"Cecil Moore" wrote in message
... Fred W4JLE wrote: I am sure you did Cecil, however I understood the question to be a shorter single element mobile antenna. Well, that's why I asked for a definition of "better". And he didn't say a "single element" was better so a 10-element beam might be the way to go. :-) -- 73, Cecil http://www.qsl.net/w5dxp Sorry - let me elaborate *why* I posted the question. I wanted to know if it was possible for any single mobile antenna less than a 1/4 wave could outperform a 10m 1/4 wave whip. Like for example a loaded 5/8 wave whip. As I understand it no whip less in size than a 1/4 wave can be more efficiant than it's larger cousin due to resisitave losses in the loading coil. Right or wrong? Long answer is OK. :-) -- 73's es gd dx de Ken KGØWX Grid EM17ip, Flying Pigs #1055, Digital On Six #350, List Owner, Yahoo! E-groups: VX-2R & FT-857 |
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