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Re: [Amps] 4CX250B Ratings in Dentron Clipperton V

Subject: Re: [Amps] 4CX250B Ratings in Dentron Clipperton V
From: Ian White GM3SEK <>
Reply-to: Ian White GM3SEK <>
Date: Sun, 23 May 2010 09:10:19 +0100
List-post: <">>
Dick Hanson wrote:
>Unfortunately, however, we're sort applying lipstick to a pig here. The 
>250B is just not a very 'worthy' tube at -22db; hard to gain BFF among 
>your neighboring six meter guys..... Might as well run an old model 
>brick with no active bias (closer to class C than AB anything).

At output levels of about 250W PEP per tube, the 4CX250B is capable of 
IMD3 figures around -35dB (referenced to PEP).

It is Eimac's marketing claims, inciting users to drive the tubes to a 
much higher power output, that were "unworthy"... not the tube itself.


73 from Ian GM3SEK
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