[Amps] Alpha &&DX Conversion

[Paul Christensen]

> "I will tell you why i run a 2 tuber, you put in 25 watts in and do 1500 easy not push a one tuber to do 1500 out. it all comes down to what you can afford. bill 73"

This may be an interesting point of reference.  During my college years, I worked at a 3KW FM station in Rockford, IL as its chief engineer.  The transmitter was an AEL FM-2.5K (FCC type accepted to 2.5KW output) and used a single 8877 to produce 2500-watts output at 104.9 MHz.  All day long, every day, 365 days a year.   A three-bay circularly polarized antenna brought ERP to 3KW.  

If a 77Dx is running intermittent amateur-class service but under high duty-cycle modes like RTTY at 1500-watts output (the U.S. legal limit, for example), I think its reasonable to assume that a 8877 is already operating with sufficient headroom of roughly 1KW.   For what purpose do any of us need more than 1KW of headroom from our vacuum tubes when producing 1.5KW?  

Paul, W9AC