Bill Smith wrote: > I am using a MFJ-259B to tune up my Tuned Input > circuits. I know to go for 1:1 SWR or as close as I > can get it and 50 ohms of resistance(Rs). How about > Xs? What value am I shooting for? Zero, but if it's a grounded grid amp, the tuning needs to be done at power, not small signal. Steve