Soc RF protectie

[SirRoger]

Poate cineva sa-mi spuna cum se confectioneaza socul de RF ( de protectie) de la iesirea liniarului?Acela care, in cazul strapungerii condensatorului de separare, pune la masa inalta tensiune.Peste tot in specificatii gasesc comentarii de felul: ,,soc comun de RF"... :smt017 Multumesc,

[MiniTehnicus]

At the output end of the pi-circuit, a RF-choke between antenna-terminal and earth ensures a low-resistance DC-path, as a safety measure in the event of a short between the anode and the output-circuit. The Telecom authorities also require it. When the anode voltage is shorted to the output, without a DC-path to earth for blowing the HT fuse (the wire-wound resistor in the anode-circuit will curtail the flaming arc across the blown fuse), the antenna cable and antenna will become death traps. An adequate choke is a short ferrite rod with 30?50 turns of 25 SWG enamelled wire. Check it with a GDO for absence of series-resonance in any amateur band.

Tot articolul se gaseste aici:http://www.xs4all.nl/~pa0fri/Lineairs/F ... 150eng.htmAn adequate choke is a short ferrite rod with 30?50 turns of 25 SWG enamelled wire. Check it with a GDO for absence of series-resonance in any amateur band.Se foloseste o bara scurta de ferita pe care se bobineaza 30-50 spire cu sarma de 0,5mm CuEm.Bara de ferita se recupereaza de la un aparat de radio AM de buzunar.

[SirRoger]

Multumesc pt. info !73!