mardi, avril 25, 2006

Un système d'adaptation d'impédances signé: F8HS

Voici le montage ingénueusement conçu dans une boite en fer de notre ami Alain F8HS .
Ce circuit permet d'attaquer à haute impédance les deux GU 81 M.
Par un système de deux relais commutés grâce à un tableau logique, ce coupleur permettra de trafiquer sur le 160 , 80 , 40 et 20 mètres .
Pour en expliquer rapidement le fonctionnement : il s'agit d'un circuit accordé attaqué à quelques spires pour obtenir le 50 Ohms. Ce circuit possède donc une sortie haute impédance à l'autre bout du C.O qui permet d'attaquer les grilles des deux tubes avec la tension requise.
Bravo à Alain F8HS pour ce bricolage simple et efficace !

10 Comments:

Anonymous Anonyme said...

Nice colors. Keep up the good work. thnx!
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Blogger TECHNOSAUVEUR said...

MERCI pour ce blog et tous ces lecteurs
Alain MAROUBY
31540 NOGARET FRANCE
Bests Regards 73 and 73

Alain

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