PS Audio BHK Pre Amp - Tube Rolling
 

I have been researching which tubes which have been rolled into the PS Audio BHK Preamp with success. Meaning they preferred the sound over the stock tubes which come with the preamp. The two which seem to rise to the top are the Tungstram PCC887DJ8 and the Amperex 7308 in my reading.

I was wondering if there have been any AA members which have used different tubes in this preamp which they preferred the sound over the stock tube?

If yes, what were they?

Thanks!

https://i.imgur.com/phfOh6e.png