ARLA/CLUSTER: Antenas endfed e outras
ct2hbo sapo.pt
ct2hbo sapo.pt
Tera-Feira, 15 de Dezembro de 2015 - 13:49:16 WET
VIVA LUIS
Afinal o homem nao tem desse tipo de cabo tem sim uns 5 metros daquele
sem ser muitifilar das instalaçoes electricas
se fizeres-me esse favor manda-me entao dai que fazemos contas ok
Estive a ver o site que me envias-te mas neste notbook nao da para
traduzir mas vou tentar a outro mas uma cois vi esta antena que ele
tem la que tem os 80 metros deve ser bacana para umas rodadas
habituais nos 80
80/40/20M MULTIBAND END-FED
Derivado a ter perdido o teu email de ontem nao sei se sera esta que
tamos falando
estou-me a lembrar de um dipolo militar PKW MULTIFILAR que tenho ali
no sotao mas um dos traps esta interunpido bem tem o tamanho de um
braaço cada bobine ou trepe e o cabo e todo de aço revistido a um
plastico ainda vou tentar recuperar aquele trepe ou bobine lol lol sei
la pois uma da a outra nao da esqueçito neeeeeee
Bem Amigo vamos la ver quanto te devo neste caso pagando o cabo 20
metros certo a maneira e o que achares justo alem do teu trabalho
se queres mandar a cobranla ou via transferenlia bancaria etc ok e vou
ver se começo a fazer umas activaçoes com voçes ai por lisboa e
aredores pelo menos ficam com um ponto aqui no sudoeste para vos dar
uns controles e partiçipar pois quero começar o modo QRP com uma
antena do LUIS CT2FZI OK
Quanto a antena para vhf e uhf tens por ai algo ...
bem faz la as contas e diz como desejas o pagamento
pareçe que ja tenho outro om para fazeres uma antena o ze carlos o CT2IOK
ate ja CT2HBO PAULO DA CRUZ
Citando CT2FZI IM58kr <ct2fzi gmail.com>:
> Paulo, a minha "end fed" baseia-se nessa, alias, em particular nesta
> do mesmo
> autor: https://pa3hho.wordpress.com/end-fed-antennes/402010-holiday-end-fed/
>
> Sim, os resultados sao positivos.
>
>
>
> 73 de Luis, CT2FZI
>
> http://www.ct2fzi.net
>
>
>
> 2015-12-15 12:42 GMT+00:00 Salomao Fresco <sal.fresco gmail.com>:
>>
>> Caos Colegas,
>>
>> Façam o favor de ignorar a ultima mensagem...
>> Foi para o destinatário errado.
>>
>>
>> Cumprimentos
>> Salomão
>>
>>
>>
>> 2015-12-15 12:40 GMT+00:00 Salomao Fresco <sal.fresco gmail.com>:
>>> Boas!
>>>
>>> Ainda no tema das End-Fed, algum dos colegas já testou este esquema:
>>> https://pa3hho.wordpress.com/end-fed-antennes/multiany-band-end-fed-english/
>>>
>>>
>>>
>>> 73 de CT2IRJ
>>> Salomão
>>>
>>> 2015-12-14 10:01 GMT+00:00 ACViegas <ct2ixq gmail.com>:
>>>> Caros Colegas
>>>> ai fica o pdf com o esquema e fotos .
>>>> Posso informar que já utilizamos a multi endfed desde 2012.
>>>> Cumprimentos
>>>>
>>>> ACViegas
>>>>
>>>> FROM: CT2FZI IM58kr[1]
>>>> SENT: Monday, December 14, 2015 9:41 AM
>>>> TO: Resumo Noticioso ARLA/CLUSTER[2]
>>>> SUBJECT: Re: ARLA/CLUSTER: Antenas endfed e outras
>>>>
>>>>
>>>>
>>>> Bom dia,
>>>> No sentido de partilhar para a comunidade deixo aqui os dados da
>>>> antena "curta":
>>>>
>>>> Transformador usa um FT 240-43:
>>>> 2 voltas bifilares e no secundario 10 voltas, atravessa o centro
>>>> e mais 13 voltas
>>>>
>>>> Basicamente transforma impedancia num racio de 1:55.
>>>>
>>>> Comprimento do primeiro fio: 4,72m
>>>> Trap 10 metros: 15uH
>>>> Comprimento segundo fio: 1,30m
>>>> Trap 20 metros: 34uH
>>>> Comprimento do terceiro fio: 1,69m
>>>>
>>>> O condensador é de 120pF, colocado entre o ponto A e B [ver
>>>> imagem anexa]. Dependendo da potencia a emitir dependera a tensao
>>>> do condensador.
>>>>
>>>> Anexei tambem fotos dos traps para referencia.
>>>>
>>>> Nota: Para QRP um toroid FT140-43 é mais do que suficiente.
>>>>
>>>> 73 de Luis, CT2FZI
>>>>
>>>> http://www.ct2fzi.net
>>>>
>>>>
>>>>
>>>>
>>>> 2015-12-13 22:39 GMT+00:00 Luis Valadas <valadas.luis gmail.com>:
>>>>> Boa Noite a Todos
>>>>> Tenho acompanhado a troca de email´s sobre este assunto e quero
>>>>> desde ja agradecer todo o trabalho realizado.
>>>>> Fiquei particularmente curioso com a solução do CT1FZI, gostava
>>>>> de ter um pouco mais informação , pois por ser mais curta e uma
>>>>> solução que me interessa para a minha casa do norte
>>>>> Quanto as toroids bom eu não conheço por cá quem as comercialize
>>>>> normalmente mando vir de Itália ou do ebay
>>>>> Um abraço
>>>>> Luis Valadas
>>>>> CT1DTE
>>>>>
>>>>> Luis Valadas CT1DTE
>>>>>
>>>>> No dia 13 de dezembro de 2015 às 22:28, Pedro Carvalho
>>>>> <papfc1 gmail.com> escreveu:
>>>>>> Boa noite
>>>>>>
>>>>>> ____ ____
>>>>>>
>>>>>> ____Junto envio os testes (SWR) que fizemos, comparando as
>>>>>> antenas endfed.____
>>>>>>
>>>>>> ________ ________
>>>>>>
>>>>>> ________Claramente, e como já esperado, a endfed é uma ANTENA
>>>>>> DE COMPROMISSO quando se trata de operar em diversas
>>>>>> bandas.________
>>>>>>
>>>>>> ____________ ____________
>>>>>>
>>>>>> ____________Os testes comparativos entre o balun PA1ED,
>>>>>> construído pelo CT1DTE e o balun EARCHI, construído pelo
>>>>>> CT1DBS, parecem mostrar que ambos “resolvem” o problema embora
>>>>>> com baixos e altos. Os fios radiantes empregues tinham o
>>>>>> comprimento de 20,45m e 16 m, respectivamente.____________
>>>>>>
>>>>>> ______________Há uma tendência para o balun PA1ED, construído
>>>>>> pelo CT1DTE, ter uma melhor prestação que o EARCHI, construído
>>>>>> pelo CT1DBS.______________
>>>>>>
>>>>>> ________________Em qualquer caso, ambos têm sido utilizados em
>>>>>> ativações SOTA com bons resultados.________________
>>>>>>
>>>>>> ____________________ ____________________
>>>>>>
>>>>>> ____________________É muito provável que se possa melhorar os
>>>>>> resultados, em função dos comprimentos dos fios, tipo de solo,
>>>>>> etc, mas não houve tempo para isso.____________________
>>>>>>
>>>>>> ________________________ ________________________
>>>>>>
>>>>>> ________________________Os baluns (PA1ED), construídos pelos
>>>>>> colegas CT2FZI e CT1DTE, deram resultados diferentes com o
>>>>>> mesmo comprimento de fio, o que pode indicar técnicas
>>>>>> construtivas diferentes ou ferrites com outros valores de
>>>>>> permeabilidade, etc, diferentes.________________________
>>>>>>
>>>>>> ____________________________ ____________________________
>>>>>>
>>>>>> ____________________________Um dia destes teremos oportunidade
>>>>>> de fazer mais testes, nomeadamente em termos de irradiação,
>>>>>> sabendo que, com a antena mais curta (CT2FZI), ainda fizemos
>>>>>> dois contactos com a Alemanha, em 40 metros.
>>>>>> ____________________________
>>>>>>
>>>>>> ________________________________ ________________________________
>>>>>>
>>>>>> ________________________________Obrigado ao CT7ABE e ao CT2FZI
>>>>>> pela companhia e formulação dos
>>>>>> testes.________________________________
>>>>>>
>>>>>> ____________________________________ ____________________________________
>>>>>>
>>>>>> ____________________________________73____________________________________
>>>>>>
>>>>>> ________________________________________ ________________________________________
>>>>>>
>>>>>> ________________________________________Pedro,
>>>>>> CT1DBS/CU3HF________________________________________
>>>>>>
>>>>>> ____________________________________________ ____________________________________________
>>>>>>
>>>>>> ______________________________________________ ______________________________________________
>>>>>>
>>>>>> ________________________________________________ ________________________________________________
>>>>>>
>>>>>>
>>>>>>
>>>>>> ____________________________________________________ ____________________________________________________
>>>>>>
>>>>>> ____________________________________________________FROM:
>>>>>> cluster-bounces radio-amador.net
>>>>>> [mailto:cluster-bounces radio-amador.net] ON BEHALF OF CT2FZI
>>>>>> IM58kr
>>>>>> SENT: Sunday, December 13, 2015 9:42 PM
>>>>>> TO: Resumo Noticioso Electrónico ARLA <cluster radio-amador.net>
>>>>>> SUBJECT: Re: ARLA/CLUSTER: Antenas endfed e
>>>>>> outras____________________________________________________
>>>>>>
>>>>>> ________________________________________________________ ________________________________________________________
>>>>>>
>>>>>> ________________________________________________________Aproveitando
>>>>>> este assunto podem partilhar comigo uma fonte de toroides
>>>>>> nacional de preferência em
>>>>>> Lisboa?________________________________________________________
>>>>>>
>>>>>> __________________________________________________________Se
>>>>>> usar a via online os portes são escandalosos dado o valor
>>>>>> unitário de cada
>>>>>> um.__________________________________________________________
>>>>>>
>>>>>> ____________________________________________________________Obrigado____________________________________________________________
>>>>>>
>>>>>> ______________________________________________________________Em
>>>>>> 13/12/2015 12:40, "CT2FZI IM58kr" <ct2fzi gmail.com>
>>>>>> escreveu:______________________________________________________________
>>>>>>
>>>>>>> ________________________________________________________________E tive
>>>>>>> oportunidade de ver ao vivo e s funcionar o balun do colega
>>>>>>> Luis Valadas
>>>>>>> .________________________________________________________________
>>>>>>>
>>>>>>> __________________________________________________________________Para
>>>>>>> alem da eficiência a qualidade da construção nao tem
>>>>>>> par.__________________________________________________________________
>>>>>>>
>>>>>>> ____________________________________________________________________Em
>>>>>>> 13/12/2015 11:40, "Salomao Fresco" <sal.fresco gmail.com>
>>>>>>> escreveu:____________________________________________________________________
>>>>>>>
>>>>>>>> ______________________________________________________________________Bom
>>>>>>>> dia,______________________________________________________________________
>>>>>>>>
>>>>>>>> ________________________________________________________________________Excelente. Eu já tenho iniciado o projecto de uma antena end-fed, mas a falta de tempo ainda não permitiu a conclusão do
>>>>>>>> mesmo.________________________________________________________________________
>>>>>>>>
>>>>>>>> _________________________________________________________________________O balun utilizado é o
>>>>>>>> mesmo._________________________________________________________________________
>>>>>>>>
>>>>>>>> _________________________________________________________________________Assim que concluir, publicarei
>>>>>>>> resultados._________________________________________________________________________
>>>>>>>>
>>>>>>>> _________________________________________________________________________73 de
>>>>>>>> CT2IRJ_________________________________________________________________________
>>>>>>>>
>>>>>>>> ___________________________________________________________________________Salomão___________________________________________________________________________
>>>>>>>>
>>>>>>>> ___________________________________________________________________________ ___________________________________________________________________________
>>>>>>>>
>>>>>>>> ___________________________________________________________________________2015-12-13 2:27 GMT+00:00 CT2FZI IM58kr
>>>>>>>> <ct2fzi gmail.com>:___________________________________________________________________________
>>>>>>>>
>>>>>>>>> _____________________________________________________________________________Viva!_____________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _________________________________________________________________________________ _________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _________________________________________________________________________________Muito positivos, superaram as minhas
>>>>>>>>> expectativas._________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _____________________________________________________________________________________ _____________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _____________________________________________________________________________________Tivemos oportunidade de testar alguns "baluns" e diferentes comprimentos do elemento radiante para tirar algumas
>>>>>>>>> elacoes._____________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _________________________________________________________________________________________ _________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _________________________________________________________________________________________Os baluns curiosamente usavam o mesmo principio de
>>>>>>>>> construcao:_________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _____________________________________________________________________________________________ _____________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> __________________________________________________________________________________________________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _______________________________________________________________________________________________Entre o ponto A e B é soldado um condensador entre 100 e 150 pF, e dependendo da potencia a usar, depende a tensão de trabalho do condensador. (por ex QRP 300V, 100W
>>>>>>>>> 1500V)_______________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> ___________________________________________________________________________________________________ ___________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> ___________________________________________________________________________________________________Uma das end-fed testadas foi encurtada por meio de 2 traps para 2 bandas (20 e 40) sendo que com apenas 7,4m era aproximadamente ressonante nos 10, 20 e 40, bastando alias encurtar o comprimento do fio da antena para um ajuste
>>>>>>>>> perfeito.___________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _______________________________________________________________________________________________________ _______________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _______________________________________________________________________________________________________Outra das end-fed usava cerca de 21,4m de fio radiante e para alem da ressonancia aproximada (em mais bandas) nenhum Antenna Tuner teria dificuldade em
>>>>>>>>> afinar!_______________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> ___________________________________________________________________________________________________________ ___________________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> ___________________________________________________________________________________________________________Infelizmente o tempo disponivel nao deu para mais... Creio que no entanto está uma porta aberta para mais encontros deste genero visto que se
>>>>>>>>> justifica!___________________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _______________________________________________________________________________________________________________ _______________________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _______________________________________________________________________________________________________________Obrigado CT7ABE e CT1DBS pela paciencia
>>>>>>>>> :)_______________________________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> __________________________________________________________________________________73 de Luis,
>>>>>>>>> CT2FZI__________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> ______________________________________________________________________________________ ______________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> ______________________________________________________________________________________http://www.ct2fzi.net______________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> __________________________________________________________________________________________ __________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _______________________________________________________________________________________ _______________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> _______________________________________________________________________________________2015-12-12 21:44 GMT+00:00 Salomao Fresco
>>>>>>>>> <sal.fresco gmail.com>:_______________________________________________________________________________________
>>>>>>>>>
>>>>>>>>>> _________________________________________________________________________________________Boas!_________________________________________________________________________________________
>>>>>>>>>>
>>>>>>>>>> ___________________________________________________________________________________________E que tal os resultados das
>>>>>>>>>> end-fed?___________________________________________________________________________________________
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ____________________________________________________________________________________________73 de
>>>>>>>>>> CT2IRJ____________________________________________________________________________________________
>>>>>>>>>>
>>>>>>>>>> ____________________________________________________________________________________________Salomão____________________________________________________________________________________________
>>>>>>>>>>
>>>>>>>>>> ______________________________________________________________________________________________ ______________________________________________________________________________________________
>>>>>>>>>>
>>>>>>>>>> ______________________________________________________________________________________________2015-12-12 19:09 GMT+00:00 Luis Valadas
>>>>>>>>>> <valadas.luis gmail.com>:______________________________________________________________________________________________
>>>>>>>>>>
>>>>>>>>>>> ________________________________________________________________________________________________Parabens e espero que tenham alcançado resultados proveitosos, o tempo ajudou, eu tive pena mas tive algumas coisas hoje agendadas senao tinha
>>>>>>>>>>> aparecido________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>> __________________________________________________________________________________________________Um
>>>>>>>>>>> abraço__________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>> ____________________________________________________________________________________________________Luis
>>>>>>>>>>> Valadas____________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>> ______________________________________________________________________________________________________CT1DTE______________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> _____________________________________________________________________________________________________Luis
>>>>>>>>>>> Valadas_____________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________________________________________________________________CT1DTE_______________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>> __________________________________________________________________________________________________________________________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>> __________________________________________________________________________________________________________ __________________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>> __________________________________________________________________________________________________________No dia 12 de dezembro de 2015 às 19:04, CT2FZI IM58kr <ct2fzi gmail.com>
>>>>>>>>>>> escreveu:__________________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>>> ____________________________________________________________________________________________________________Foi bastante produtivo com resultados surpreendentes.
>>>>>>>>>>>> ____________________________________________________________________________________________________________
>>>>>>>>>>>>
>>>>>>>>>>>> ______________________________________________________________________________________________________________Nada como o QRP/P
>>>>>>>>>>>> ;)______________________________________________________________________________________________________________
>>>>>>>>>>>>
>>>>>>>>>>>> ________________________________________________________________________________________________________________Em 12/12/2015 11:30, "Pedro Carvalho" <papfc1 gmail.com>
>>>>>>>>>>>> escreveu:________________________________________________________________________________________________________________
>>>>>>>>>>>>
>>>>>>>>>>>>> __________________________________________________________________________________________________________________Bom
>>>>>>>>>>>>> dia
>>>>>>>>>>>>>
>>>>>>>>>>>>> Hoje à tarde, sábado, alguns colegas (CT7ABE, CT2FZI,
>>>>>>>>>>>>> CT1DBS, etc) estarão no Parque das Conchas a fazer
>>>>>>>>>>>>> testes com antenas endfed e outras.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Quem quiser aparecer é bem vindo.
>>>>>>>>>>>>>
>>>>>>>>>>>>> 73
>>>>>>>>>>>>>
>>>>>>>>>>>>> Send from my mobile - Hence brevity
>>>>>>>>>>>>>
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> CLUSTER mailing list
>>>>>>>>>>>>> CLUSTER radio-amador.net
>>>>>>>>>>>>> http://radio-amador.net/cgi-bin/mailman/listinfo/cluster__________________________________________________________________________________________________________________
>>>>>>>>>>>>
>>>>>>>>>>>> __________________________________________________________________________________________________________________________________________________________________
>>>>>>>>>>>> CLUSTER mailing list
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>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________________________________________________________________________ _______________________________________________________________________________________________________________
>>>>>>>>>>>
>>>>>>>>>>> _____________________________________________________________________________________________________________________________________________________
>>>>>>>>>>> CLUSTER mailing list
>>>>>>>>>>> CLUSTER radio-amador.net
>>>>>>>>>>> http://radio-amador.net/cgi-bin/mailman/listinfo/cluster______________________________________________________________________________________________________
>>>>>>>>>>
>>>>>>>>>> ___________________________________________________________________________________________________ ___________________________________________________________________________________________________
>>>>>>>>>>
>>>>>>>>>> ______________________________________________________________________________________________________________________________________________
>>>>>>>>>> CLUSTER mailing list
>>>>>>>>>> CLUSTER radio-amador.net
>>>>>>>>>> http://radio-amador.net/cgi-bin/mailman/listinfo/cluster_______________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> ____________________________________________________________________________________________ ____________________________________________________________________________________________
>>>>>>>>>
>>>>>>>>> __________________________________________________________________________________________________________________________________
>>>>>>>>> CLUSTER mailing list
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>>>>>>>> ________________________________________________________________________________ ________________________________________________________________________________
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>>>>>>>> ___________________________________________________________________________________________________________________________
>>>>>>>> CLUSTER mailing list
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