I played with this jumper setting on some Amperex 7308 tubes and I liked 4ma better than 5ma. YMMV. It's an option to try with the 6922 variants, but I believe you need 5 ma for the 12AU7's. Pretty good preamp, especially for the $$$!
PS Audio BHK preamp owners
Hi
This question is aimed at PS Audio BHK preamp owners regarding the tube bias. I understand that the bias is user adjustable by just moving an internal jumper pin (pretty brilliant). The unit ships with 12au7 tubes set at 4 milliamperes. When the jumper pin is moved the bias is increased to 5 milliamperes. I would like to know if anyone has tried this and if so did you like it? Thank you.
Scot
This question is aimed at PS Audio BHK preamp owners regarding the tube bias. I understand that the bias is user adjustable by just moving an internal jumper pin (pretty brilliant). The unit ships with 12au7 tubes set at 4 milliamperes. When the jumper pin is moved the bias is increased to 5 milliamperes. I would like to know if anyone has tried this and if so did you like it? Thank you.
Scot