Okay Peter - that one sounds very much like a leaky C13. That capacitor couples the anode of the driver to the grids of the PA and is another of those known weak spots!
I sounds as if your radio does need a fair bit of TLC and I would recommend replacing C11, C13, C131 and C17 - all of these are chassis mounted items on the underside of the radio in the driver/PA area. Whilst there, the driver & PA areas should also be checked to see if any of the resistors there have gone out of tolerance and replace any that have.
I have an early 101 and a late 101E and have seen all of the above capacitors go leaky on one or both radios, plus a number of the resistors in the driver/PA area go out of tolerance.
73,
Peter
G4DJB
