Thank you very much for your valuable suggestion!
We will solve it as soon as possible!
Capacitor type for tube preamp
I recently bought a 12ax7 Baxandall tone control PCB from eBay. I'm a confused when trying to obtain capacitors as there are so many type and not sure of the required voltage. As the HT is 250V I'm going to get 400V+ (which ever is cheaper) to be on the safe side.