Calling BAT amp/preamp owner


Hello,
First of all, my set up is vk75se, vk50se, krell kav300cd, and sf grand piano. I just notice yesterday (I didn't really pay attention to this before) that my system produces quite loud popping noise(static?) from speakers when I mute or turn the volume to zero. I am wondering if my fella bat owners experience this too. I tried to pin point the problem but got some mixed results. First, I suspected a bad driver tube, because the popping noise appears on the same side as the bad tube is (I swapped tubes left to right vice versa), but when I use my Krell HTS preamp, this popping noise is not there when I mute/turn down vol to zero. Which mean the driver tube is ok. I'm confuse...
heeengky
Heeengky:

I am not sure it is the tubes. I suggest you discuss it with Victor. Victor is great to deal with. he will answer every question you send in.
Heeengky - Drop me an e-mail and let me know how you make out. I agree with Unsound in that I would not be very happy with BAT if I were unable to resolve the problem. For me however, the problem was resolved with a simple tube replacement. I hope you fare as well.
Hello, I just replaced both 6H30 tubes with the new ones(sovtek) and Tenniswino is right, that seems to solve the problem. No more loud pops when muted. Thanks guys.
OK, guys, I've never heard ANY noise on muting, on/off, input change, etc, from VK3i. However, now I have a rythymic, low volume "ping" when unit is powered on, with no input. Not present when its muted. Sounds fantastic, no way it could be heard even with lowest level of gain when listening to a source. Any ideas?