Who has switched from a PS Audio BHK Preamp to something else?

@thiefoflight Pretty awesome when SS can sound better than tube because then you get the convenience and stability of SS ! :D

C900U vs T+A would be a nice SS pre shootout.

@smodtactical The T+A is “blacker” than the C900u, and the C900u is more refined overall. T+A is more emotional, exciting and engaging in my opinion. But everyone’s preferences vary!

I have some insight to share about using 6SN7 tube types in the PS Audio BHK Preamp. While it's true that the PS Audio heater circuit is not quite up to the challenge of supplying the necessary DC current to the 6SN7 tube, I have used a work around successfully for about 6 months now.

The mod can be implemented entirely using pin savers (no actual preamp mods) by removing the heater leads on the pin-saver. I am feeding an external 12 volt DC power supply to two 6SN7's with heaters wired in series to the top-side of the tube pin-saver. I use a 12 volt relay (DC rated) controlled by the trigger circuit built into the BHK set to zero time delay in preamp setup. Finally you need to buy a quality 12au7 to 6SN7 adaptor. The negative pin coming from your power supply must be grounded to avoid hum.

Like others I have found Sylvania 6SN7GTB chrome domes to sound amazing.

I use the 5 ma jumper setting. If you look at the tube bias charts 6SN7 tubes with these relatively low B+ voltages can become non-linear at 4 ma bias setting. YMMV. 

I will not get into all the opinions about various tube types. For me the journey was worth the small amount of work to get the 6SN7 working well in the BHK. 

I'm not saying this comes without risk but if you know what your doing it has proven safe in my setup. Of course it will void your warranty if you have any left.

Enjoy!