Mylast(s) and kind replies. Sorry for delay plus missing out the U-tube link here https://www.youtube.com/watch?v=6RnAC2PuuI8 and grateful on any comment re electrolytic failure in reply from WA4AOS and others.. Another thing I've noticed which was not there before is the "chuffing" sound when I move the main dial.. 73 Malcolm F5VBU