>I think it could easily handle 4 kW on CW and SSB. Wellll, that's a stretch. The KW MB was designed to handle 1 KW input phone and CW. On phone, that's roughly 700 w. output, modulated to roughly 2.8 KW. EFJ probably designed it with some degree of overkill, but I think I'd expect some flash over on 4 KW. 73 Rob K5UJ