the 717 doesnt get a good write-up in relation to the valve units and they do have a point.etherical and light as somebody said transistorised ect.when staxs troubles started some years ago so did mine stopped working.On removing the cover in a minute I discovered that the mains input fuse had blown(600ma) I replaced it with a 1amp fuse after testing it by shorting out one leg of each full wave rectifiersin turn(blew every time). The transformer is high quality as is the volume control and electrolytic capacitors.But I was not so pleased with some of...