Re: [Amps] LK-550 mixing tubes

["Roy Koeppe" <royanjoy@ncn.net>]

"...One of the tubes recently developed a  screen to
grid short.  The two existing tubes are regular Eimac 3-500z with  the
redish
ceramic base.  Does my replacement tube need to be an Eimac or  can I
substitute another brand 3-500z graphite or non graphite?"

3-500Z's have no screens.

73,   Roy    K6XK

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