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#1
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![]() Tarmo, Or, you could look at it in the opposite way. The tuner would replace the beam, tower, and rotor at a net savings of ~probably~ the price of the tuner. I wonder why people are so 'afraid' of tuners? 'Doc |
#2
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![]() "'Doc" wrote in message ... Tarmo, Or, you could look at it in the opposite way. The tuner would replace the beam, tower, and rotor at a net savings of ~probably~ the price of the tuner. I wonder why people are so 'afraid' of tuners? 'Doc OK, how about this: I was just listening to an EA8 on 20 meters. He was S9 on the tribander, and S4 on the 75 meter antenna. Also, why have a no tune transmitter when you have to retune the antenna tuner when you change frequency. Tam/WB2TT |
#3
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![]() Tarmo, Wrote in part; Also, why have a no tune transmitter when you have to retune the antenna tuner when you change frequency. Well, lets see. 1. No tower, or room for a beam antenna. 2. Hand, wrist, and arm not broken, sprained, strained, or lazy. 3. The 'no tune' transmitter wasn't ~my~ idea. I don't mind tuning. 4. Simplifies antenna system. 5. Even if I think antennas are beautiful, neighbors don't. 6. Don't really care if 'they' hear me S-9 or S-4, as long as they hear me. Same for hearing 'them'. 7. Had a tribander. The loop did as well and in some instances better. (Do have to admit the tribander wasn't up very high.) 8. Don't have to worry about a rotor and everything associated with one. 9. And... we're talking about a "best" 'all around antenna' which implies not having several. No ~one~ antenna does everything well, there are always compromises in performance vs. simplicity. Some would rather use a tuner than have a number of antennas, some won't. I really don't think it'll make much difference either way... 'Doc |
#4
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Howdy, Toy
Best all around antenna is a center fed doublet fed with balanced TL such as transmitting twin lead, ladder line, or open wire line. Make sure that the sending end of this TL "sees" balanced source. Mine is 130 ft long fed with 300-Ohm transmitting twin lead. I use it on all bands 80 thru 10. I have also used it on 6M with my tuner straining to get a match. On 40 the theoretical gain over a dipole is said to be 1.8 dB. If you can only have one antenna, this is your best bet. 73 es gud luck, Jack K9CUN |
#5
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JDer8745 wrote:
Best all around antenna is a center fed doublet fed with balanced TL such as transmitting twin lead, ladder line, or open wire line. He asked for the best all *round* antenna. Your antenna is not round at all. :-) -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#6
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Thanks heaps to all who have replied so far. It really is nice to see so
many people willing to share the knowledge with those less in the know. Warmest regards to all, and if anyone want's to make more recommendations, feel free. 73 de VK2HXY Troy Sydney Australia "Cecil Moore" wrote in message ... JDer8745 wrote: Best all around antenna is a center fed doublet fed with balanced TL such as transmitting twin lead, ladder line, or open wire line. He asked for the best all *round* antenna. Your antenna is not round at all. :-) -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#7
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"JDer8745" wrote in message
... Howdy, Toy Best all around antenna is a center fed doublet fed with balanced TL such as transmitting twin lead, ladder line, or open wire line. Dont forget a balanced feedline radiates along the line. You may have to deal with this somehow with the Australian Communications Authority's new radiation guidelines. |
#8
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Michael wrote:
Dont forget a balanced feedline radiates along the line. If the currents are balanced, most of the photons are re-absorbed by the free electrons. OTOH, if the currents inside a coax feedline are not balanced, an unbalanced feedline radiates along the line. -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#9
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I actually meant to say induced currents not radiated since this is near
field. Given that the ACA's radiation guidlines talks about near fields and not far fields its probably appropriate to consider induced currents from open wire feeders to nearby people. As most transceivers have an unbalanced output its just as easy to make it unbalanced at the antenna end of the transmission line anyway unless you want to use the transmission line as part of the antenna / impedance match. Then you can be reasonably sure there will be no radiation induced into humans near your transmission line and be in compliance with the ACA regulations (and safer for others I guess). "Cecil Moore" wrote in message ... Michael wrote: Dont forget a balanced feedline radiates along the line. If the currents are balanced, most of the photons are re-absorbed by the free electrons. OTOH, if the currents inside a coax feedline are not balanced, an unbalanced feedline radiates along the line. -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#10
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"Michael" wrote in message
... I actually meant to say induced currents not radiated since this is near field. Given that the ACA's radiation guidlines talks about near fields and not far fields its probably appropriate to consider induced currents from open wire feeders to nearby people. From memory it specifies maximum volts/area to the distance where person can gain access to the antenna. It also mentions a maximum flux/area or it could be a certain induced current in some standard measurement device I think. I haven't looked at it for over a year now. It all doesn't matter too much when youre using coax anyway so then you can use the standard tables they give you. |
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