Dale, A Google search brings up several hits. The 1987 Amateur Handbook shows the following typical specs (per tube) for GG operation: Plate Volts Grid Volts Plate Current Drive Power Output 800 -10 150 ma. 12.5 W 82 W These numbers should put you in the ballpark. 73's Jim W5IFP > -----Original Message----- > From: yaesu-bounces at mailman.qth.net > [mailto:yaesu-bounces at mailman.qth.net]On Behalf Of yash at aol.com > Sent: Wednesday, December 15, 2010 11:36 AM > To: yaesu at mailman.qth.net > Subject: [Yaesu] tune a ftdx400 >>>> Iam about ready to put my ftdx back on the air. This rig having > sweep tube outputs is a bit different than my Heath and Collins > rigs. The manual really does not give current levels etc. when > doing tune up. Can any one give me a rough area the 6kd6's like > best. Don't plan to drive the rig much above 100 watts. can do 400 pep. > thanks > dale wt4t >>>>> ______________________________________________________________ > Yaesu mailing list > Home: http://mailman.qth.net/mailman/listinfo/yaesu > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Yaesu at mailman.qth.net >> This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html