Help in replacing a high voltage capacitor.

[Atomillo]

Hi:

Doing as Gyro mentioned, I checked physical dimensions, and quickly runned into problems.

As shown, the space bewtween the chassis and the board is about 3.5cm. The heigh of the 0.05uF capacitor (https://www.mouser.es/ProductDetail/505-FKP1Y024707H00MS) is 4.55cm 
I've checked for axial mounted capacitors of the right spec but there are none in stock or even ordered.
The only other option is a lug mounted capacitor (https://www.mouser.es/ProductDetail/WIMA/SNFPX024707E2EKS00?qs=sGAEpiMZZMsh%252B1woXyUXjycuPj0va9qfD8UBFGcFYX8%3D). What the hell am i supposed to do with that?

I tried looking to see if it could be mounted underneath. Doesn't look like it! The cover is quite tight. It also seems like there is no room in the board.

What can I do? I tried searching for values that are close to the needed ones but all the axial are still out of stock and none of the radial are ok.

I would be extremely grateful for any advice.

[Gyro]

That's a shame, it is one of the few parts that they have in stock.

MKP parts (Metalised Polypropylene film) tend to be smaller that FKP (Polypropylene film and foil) but I'm not sure they are manufactured at that voltage rating. FKP have much higher pulse current rating, and capacitors of that voltage have limited applications. I don't see any MKP listed anyway.

The only thing that comes to mind is mounting the capacitors flat (vertically) on the metal front panel and using well insulated flying leads to connect to the PCB. This would help matching lead spacing too. Then you would only have to contend with the thickness of the capacitors, not the height.

Secure mounting would be a concern, as would insulation from the metal panel. You would probably want to interpose an insulating sheet. The question is, would double sided tape or epoxy adhesive be safe and acceptable. Clearly it would be safer to create some form of flat plate clamp, screwed to the internal panel.

[Atomillo]

Insulation and safety are very concerning because the chasis is ground,  the capacitor is connected right at the output, and right there the frontal controls are located.

Looking at the schematic, the capacitor (C115) appears to only filter the output in conjunction with R188 (33 ohm resistor).

Rather than messing with the physical construction of the supply, I feel like it would be better to use a lower value capacitor and might be just accept the increased noise (if it indeed appears). After assembly I could check the noise and if performance is acceptable just leave it at that.

I must confess I never expected this to be a problem. Who would have thought.....