Assistance on part value for HP 8647A Signal Generator

[TheDefpom]

Hi All,
I just picked up a 8647A signal generator from eBay, it was all working fine whilst I did my initial testing, and then POP... smoke... yucky smell. just like the IEC line filter smell from the 8904A!

I traced it back to the power supply, a metalized paper capacitor had blown apart, its designation is C7 and it is located between the smaller u shaped (live) heatsink, the transformer and the large 470uF capacitor.

Its only identifying numbers were 630V/300V MP and 40/070/56 which I traced back to a part, however, based on its dimensions, its value is either 0.047uF or 0.068uF, I am hoping that someone out there can take a look at there unit, (or even better has a diagram!) and tell me which is the correct one ?

I have ordered both values, which will take a few days to arrive, so it would be nice if I could have this information to hand by the time they turn up, otherwise I will have to take a chance and just try one.

I was doing a video at the time, so expect to see another "Who let the smoke out" episode on my channel in the near future!

This power supply is also the same as the one featured in The Signal Path's TSP#16 for the HP8648A, I tried to see the value in his video but I could not see it clearly enough.

[TheDefpom]

FYI, I managed to find a photo yesterday which was just readable enough, it is a 0.047uF, just in case anyone else has the same part blow up on them ! (its likely if you use >220V AC)