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[AMPS] L-4B conversion to 3CX1200

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Subject: [AMPS] L-4B conversion to 3CX1200
From: (Morel Grunberg)
Date: Tue, 25 Feb 1997 08:19:38 +0200

>        The Peter Dahl page has a reference to an article by Pete Warren in
>an old CQ magazine on the conversion of a Drake L-4B from 3-500s to either 1
>or 2 3CX1200s. I cannot find the article, nor have I heard of anyone that
>tried it. Anyone on this reflector know of the article or of anyone that has
>done this?
>73 de Jim, KF7E
>Jim Henderson


I rcvd this article few years ago from Eimac with their tubes catalog
some application notes I asked. Personnaly, I'm not so sure that this
conversion is such a good ideea: it's quite laborious, costly and this
old tube has poor spectral purity performance than 3CX1500 or 3CX800
and needs 100W drive.It's cheaper than the new ones but , no free

73 de Morel, 4X1AD 

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