In the 1960's I had an active aerial using an 807 as the front-end - with 600v on it too! Later modified to use an E186F instead. Why are they using double triode E88CC? Can't possibly have the slope and overload characteristics of an E186F. Walter G3JKV. OK Frank here is something to strive for when the Active antenna ////////// becomes : 0 ) Bob K3DJC