Ready to open up as no sound at all from her..3rd May 1970!one EL84 socket changed at some timeneat I can only see one changed components (and that one turned out to be the one that had failed!) looks like this one has leaked a bit.. but still working…Here is the culprit.. 1K resistor gone open circuit.. should have been a 750 Ohm 5 Watt not a 1K 2 Watt… previous incorrect repair me thinks..I used 2x 1.5K 3 Watts in parallel making up a 750 Ohm 6 Watt resistor. This will not fail!All good ready to go back in case!