I'm thinking of upgrading the input and output caps of my little Yaqin 6J1 valve buffer and would appreciate any recommendations for suitable upgrades. Nothing too fancy just a decent quality item.

There's no values on the existing ones and they are a bit of a pig to unsolder just to measure but the input caps are twice the physical size of the output caps.

I'm assuming any value between 1 to 4 uf is suitable, is that about right?

B+ voltage is 203V. Does the voltage rating of the coupling caps just need to be comfortably higher than this, e.g. 250V, or should there be more headroom?

Thanks in advance
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