Mastersound Compact 845 with Pvsane 845T

Another problem or perhaps not.The 845Ts have been running for approx 45 Hrs ,Sound is fine ,however there is a very very low buzz which does not effect the listening,coming from both speakers.This can only be heard when the music is off.the level of the buzz does not increase or decrease with the volume control.Could it be Bias or Hum adjustment which is required.ANY OTHER 845 COMPACT INTEGRATED OWNERS DOES THE LARGE CENTRE TRANSFORMER MAKE A AUDIBLE HUM/BUZZ.
Thanks
Patal

“…845-T is a drop-in replacement for 845A and 845B, but it is not a clear improvement over 845A, while 845B generally is….”
I can’t believe that someone having an amp of such a caliber could write this. The information is misleading and not true.
I’ll start from the beginning.
I’ve been using Mastersound 845 for three years, power tubes Shuguang 845B. I lost two of them in that period, one after 6 months and another one after two years (was plying 1200-1300 hours a year). After having done my homework I’ve decided to try Psvane 845T MkII. The difference between 845B and Psvane 845T is obvious, no need to do ABA listening tests, it’s obvious and instantly audible.
The thirst thing you notice immediately , Psvane is a cleaner sounding tube, less noise.
Psvane 845T MkII has much better HF extension and is a better resolving tube. You get better detail across the whole frequency range. There is more low level detail, soundstage has more “air”, more ambience info. Images are more precisely drawn within the soundstage, localization of instruments more stable. 845B images are a bit vague in comparison. Overall Psvane 845T has better clarity, better transparency and slightly improved dynamics.
If that’s not an improvement then what is?

I’ve been using Mastersound 845 for three years, power tubes Shuguang 845B. I lost two of them in that period, one after 6 months and another one after two years (was plying 1200-1300 hours a year). Recently I've replaced 845B tubes with Psvane 845T mkII. The difference between 845B and Psvane 845T is obvious and instantly audible.
The thirst thing you hear Psvane is a cleaner sounding tube, less noise.
Psvane 845T MkII has much better HF extension and is a better resolving tube. You get better detail across the whole frequency spectrum. There is more low level detail, soundstage has more “air”, more ambience info. Images are more precisely drawn within the soundstage, localization of instruments more stable. 845B images are a bit vague in comparison. Overall Psvane 845T has better clarity, better transparency and slightly improved dynamics.

ANY OTHER 845 COMPACT INTEGRATED OWNERS DOES THE LARGE CENTRE TRANSFORMER MAKE A AUDIBLE HUM/BUZZ.
Thanks
Patal

Hi Patal, i know this is a old thread but I have the same Buzz sound from Center transformer and was wondering have you managed to find out what it is?

I also have a buzz from center transformer 
Both speakers buzz loud enough to hear clearly from listening position when volume at zero. 
I'm running Chinese 845C tubes (bought it used with those tubes)

What is your recommendation for 845 tubes? Did you solve the buzzing problem?