Thanks for the advice. Re. the nick in the HV lead, I have not used dielectric grease before, does it set or would I need some particular variant for the voltages involved? Also, would a better solution be a dab of grease to fill up the nick, then to contain the grease with a short length of 4:1 heatshrink such as this:
The product linked appears to have 36kV dielectric strength. I reckon one cm of this (16/4) would slip round the Alden connector (I know because I have some 14mm and that just gets round the leg of it , but it is 2:1 so sadly no use). The black HV cable is 5.5mm diameter in case anyone wants to know.
@G?ran; were the symptoms of the U1615 a quiet crackle, almost like a ticking at first but not regular? I can elicit the odd crackles from the HV ultor pink cable by poking it with a glass fibre rod but they have a different quality of sound and are not as quiet as the noise I'm concerned by. R1604 appears fine and looks original to me. Maybe if there is something wrong in U1615 it is not as advanced as yours was yet? Do you think I should swap over the 7 x cap multiplier for my spare just in case? I know its not clever to change without good reason, I can't even claim to be certain that the spare unit works (though it should do given provenance). My only reason would be to not have to dig into the PSU for a while after completing this particular task. Opinions/judgements on this anyone?
I am wondering
