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Re: [Amps] Drake L-4B fan - too small and too slow?

To: Jason Buchanan <>
Subject: Re: [Amps] Drake L-4B fan - too small and too slow?
From: John <>
Date: Fri, 30 Dec 2005 18:16:45 -0800 (PST)
List-post: <>
Hi Jason
  My L4 used Amperex 3-500Z tubes.  When used at the power level in the drake 
manual and the Drake tune up procedure, did not show any color except at long 
key down at I kw input.  The manual said they are not to show color. The L4 was 
made for a short time before the L4B .  The L4 is much rarer.  The ability to 
see the tubes causes problems for the mind.  Think of the poor tubes in the 
  Jason Buchanan <> wrote:   
> I just sold my L4 and anything key down at or over 1kw input caused the 
> plates to glow very orange.

same here - 3-400Z idle on SSB mode causes them to get dull orangish. 
Sometimes I wish I had some of the new 3-500Z graphite jobs but the fan just 
isn't up to snuff to keep them alive.

73 Jason N1SU

Jason Buchanan - Boxboro, MA

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