[Amps] 3rd Order IMD

[R.Measures]

On Sep 21, 2005, at 2:45 PM, David C. Hallam wrote:

> Looking through Bill Orr's handbook, I found a table that gives the 3rd
> order IMD for 6146's in AB1 as about -24/25 db.

Because 6146 amps typically use  RF-NFB, the total IMD is c. –38db from 
pep.

> If that's the case, how can
> your signal be any cleaner than that as long as the IMD of your 
> amplifier
> tube is no worse than that?
>
> David C. Hallam
> KC2JD
>
>
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org