Re: Murphy A188C repair.
Not sure about the UU6 but others in that series such as the UU4 and UU7 with a cathode to heater connection have the cathode spot welded to one side of the heater lead out above the pinch as do other rectifiers such as the R2, 5Z4G, GZ32, 5V4G, MU14 etc so far as I can make out.
Lawrence.
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