[Top] [All Lists]

Re: [Amps] IM distortion and such

To: <>
Subject: Re: [Amps] IM distortion and such
From: "Tom W8JI" <>
Date: Tue, 27 Jun 2006 14:22:53 -0400
List-post: <>
> Tom,
> It says it on page two of the Eimac 3-500Z spec sheet. See 
> the one the link was provided for earlier.

Single tone carrier level has absolutely nothing to do with 
operation in a different set of conditions such as two-tone 
modulation at a different anode voltage, bias, and power 
level. You are reading more into the data sheet than it is 

For a given set of tuning conditions (load line) a person 
can make the single tone level any level he wants by varying 
drive and the two-tone test will remain the same as long as 
the two-tone power level isn't changed. Single tone and 
two-tone are two totally different conditions, and as the 
data sheets say other operation is permissible.

Two other random people besides myself have now posted that 
the did the equivalent of a transfer function (which is what 
really measures linearity) and both posted the best 
linearity when the steady-state loadline was established at 
about 550mA. Actual performance under one set of conditions 
cannot be determined by extracting data from a test under 
totally different conditions.

73 Tom 

Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>