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Re: [Amps] 4CX5000A in grounded-grid

To: amps@contesting.com
Subject: Re: [Amps] 4CX5000A in grounded-grid
From: donroden@hiwaay.net
Date: Tue, 18 Mar 2014 13:22:12 -0500
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Quoting "Fuqua, Bill L" <wlfuqu00@uky.edu>:

  There was an article in QST, the first I believe, where 4x150A tubes were
operated in grounded grid with both grids grounded. However, they were
operated an reduce power.

I built a "30L-1 Copy" using a quad of 250bs with 2 watt 150 ohm carbon off the first grid of each tube. The resistors looked good after two years and the amp was still putting out a KW when it sold. 2000@.8amps IIRC

Don W4DNR




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