ARLA/CLUSTER: Nova antena Cushcraft R9 para 6, 10, 12, 15, 17, 20, 30, 40, 80 Metros

[pedro_transistor sapo.pt]

Concordo com o colega Gomes!
    Mais uma carga-fictícia denominada de antena!
    Nem comprimento para os 40 metros deve ter quanto mais para os 80
metros por isso vai de bobines pelo meio... Prefiro um dipolo e um tuner
se necessário!
    Nunca compreendendi muito bem esta necessidade dos fabricantes fazerem
antenas verticais, ainda por cima sem plano de terra como é o caso desta
R-9... Bom, alguém há-de as comprar senão não as faziam!

    Cumprimentos 73
    CT7AHV - Pedro Madeira
     

Quoting Gomes <ct1hix  sapo.pt>:
> Boas
>    É muita banda para uma antena só!!!
> Gomes, CT1HIX http://www.ct1hix.webs.com/   Em 15-03-2013 8:56,  
> ct2jnm  sapo.pt escreveu:
>>
>> Gostava de ter uma!!
>>     Mas aqui na beira serra onde os ventos atingem com facilidade  
>> mais de 100K/h não a devia ter em pé por muito tempo
>>     CT2JNM - Nuno Fonseca
>>      
>>
>> Quoting "João Costa > CT1FBF" <ct1fbf  gmail.com>:
>>>  CUSHCRAFT R9 COVERS 6,10,12,15,17,20,30,40,80 METERS.
>>>
>>>
>>>
>>>   * NO GROUND SYSTEM OR RADIALS NEEDED
>>>   * RUGGED CONSTRUCTION INSTANT BAND CHANGING
>>>   * SLIM LOW PROFILE SILHOUETTE
>>>
>>>
>>> [1]This multiband vertical designs provide 9 band coverage  
>>> encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands.  
>>> Cushcraft achieved a major breakthrough in the development of an  
>>> HF multiband vertical antenna that has been specifically designed  
>>> for use with a tuner and amplifier. As a result, the antenna more  
>>> accurately addresses the needs of the contemporary ham shack.
>>>
>>> Multiband vertical antennas have always been complicated designs  
>>> with components as likely to be damaged by high levels of  
>>> mismatched transmit power as the rigs they are attached to. Before  
>>> the use of tuners became widespread, the antenna was protected by  
>>> the same safety mechanisms that protected the rig. Now, the  
>>> automatic power reduction circuits of the past have actually  
>>> become a second layer of protective circuitry. Although the  
>>> auto-tuner provides the ham with a more versatile device as well  
>>> as protecting the rig?s components, the antenna is more vulnerable  
>>> than ever. With the press of a button, very high loads can be  
>>> imposed on the antenna. The result to the antenna can be  
>>> catastrophic failure in some instances.
>>>
>>> Link[2]
>>>
>>> Price: $640 USD
>>>
>>> Fonte: Sparky\'s World of Amateur Radio[3]
>>>
>>>
>>
>>
>>      
>>
>>
>> _______________________________________________ CLUSTER mailing  
>> list  
>> CLUSTER  radio-amador.nethttp://radio-amador.net/cgi-bin/mailman/listinfo/cluster
>
>  
>




Ligações:
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[1] <a  
href="http://www.cqdx.ru/ham/wp-content/uploads/2013/03/Screen-Shot-2013-03-05-at-9.45.46-AM.jpg">  
http://www.cqdx.ru/ham/wp-content/uploads/2013/03/Screen-Shot-2013-03-05-at-9.45.46-AM.jpg</a>
[2] <a href="http://www.cushcraftamateur.com/">  
http://www.cushcraftamateur.com/</a>
[3] <a  
href="http://www.google.pt/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=1&cad=rja&ved=0CC8QFjAA&url=http%3A%2F%2Fwww.cqdx.ru%2Fham%2F&ei=GAJCUbXrH4ar7AbLg4HADA&usg=AFQjCNFaQUw-xZ6MMoVz3mbb948yRpcT6g&sig2=Zd7P-NKJB2szoymuFsPsrg">  
http://www.google.pt/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=1&cad=rja&ved=0CC8QFjAA&url=http%3A%2F%2Fwww.cqdx.ru%2Fham%2F&ei=GAJCUbXrH4ar7AbLg4HADA&usg=AFQjCNFaQUw-xZ6MMoVz3mbb948yRpcT6g&sig2=Zd7P-NKJB2szoymuFsPsrg</a>
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