| SB-200 uses a pair of 572B triodes. The most I have seen come out of and 
SB-200 is maybe 800 Watts, and I suspect there was some reflected power 
making the  power reading higher than real output. Six hundred or 650 
watts output can be expected. The SB-201 is the post 10 meter capability 
ban version of the same amplifier. 
 SB-220 uses a pair of 3-500Z triodes and will put out about 1200 watts.
 
 DE N6KB
 
 
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