[AMPS] 4CX250 in G2DAF Circuit

[G0MJW]

> The reported instance instance of one G2DAF amplifier with a -22 db 3rd
> order distortion is within 10% of the published specifications of the
> 4CX250B tube using a closely regulated screen voltage.  Care and Feeding
of
> the POWER GRID TUBE published by Eimac states that the 3rd order
distortion
> of the 4CX250B is -25 db.

How is -22 dB (1/160) within 10% of -25 dB (1/320) ? Surely it is twice as
bad ?

Besides, it is not the 3rd order product that matters so much, it is the
5th,7th,9th,11th......


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