Jupiter Caps in tube preamp application


I just ordered some Jupiter Copper Foil caps for my Art Audio Vinyl Ref preamp but now i am thinking maybe that is a bad idea due to temperature issues? Jupiter says they are designed to work up to 80C which is high but was wondering what others think about this. Advice is appreciated.
jimbones
Jim,
I would think that as long as the caps are not directly adjacent to the tubes you should be ok.
FWIW I use the Jupiter copper foils as the interstage coupling caps in my ARC VT100 power amp I do have them mounted on the backside of the PCB opposite the tubes.

Scott 
Dear @jimbones  : Which caps in your preamp you will change and which caps are the original ones ( I mean manufactured by ) ? what are you looking for changing the original caps. Something wrong with these ones.?


Regards and enjoy the MUSIC NOT DISTORTIONS,
R.
when I first got the preamp it did a LOT of things well, with the exception that it was just a bit hard/forward in the midrange. Looking to mellow it out a bit.