On 16 Feb 2013 at 15:32, Ian Wilson wrote: > > Hi Ken, > > P = (Vrms * Vrms)/R Ah! E(rms)^2/R, NOT E(pk-pk)^2/R then. But sqrt2 = 1.414~ So we have then: (35/1.414)^2/500=1.22 watts then. Still darned loud here. Thanks, Ian. Ken W7EKB