Bendix 6106 rectifier in Primaluna Prologue 3

Thanks for your reply. I think I will reach-out to Upscale Audio and see what they say.

And Primaluna USA says: "We cannot recommend using any other rectifier other than a 5AR4/GZ34."

I have a couple of National Electronics tubes that are labeled 5AR4, but I was told by my tube-wise buddy that they are actually a 6106 tube. Glad I didn't just go ahead and pop them in and toast something.

One night (after a beer or two) I dropped a pair of 6106 tubes in and have been running them for nine months with no issues. It is actually quieter on startup--no more "thump."