Topband: Amplifier question

[James Rogers]

Top Banders,

I just bought my first amp. I have followed the tuning direction  
verbatim. I have also read several other tuning procedures and applied  
them with about the same results.

I'll keep the amp manufacturer's name out of this.

When I'm running bearfoot the Daiwa CN-801 wattmeter agrees almost  
exactly with the Icom rigs watt indicator.

When running with the amp my Daiwa CN-801 wattmeter says I am putting  
out 425 watts (power turned down from a max of about 600w), with about  
30 watts of exciter input, and response from contracts on cw was very  
good during the ARRL test, with most contacts worked within 1-3 calls.

I called the amp manufacturer to talk to them and continue my  
learning, and told them I am running about 80 mA of grid current,  
about 400mA of plate current, at about 1600 plate volts with about 30w  
of exciter input. The manufacturer says there is not way I am putting  
out 425w with only 30w of rig input. The manufacturer say I should be  
putting out about 300w with 30w of exciter input.

Who is right?  The manufacturer of the amp or the Daiwa wattmeter that  
agrees with the Icom watt indicator when running bearfoot?

Jim N4DU