Thanks for your info Groundsource. I have replaced all the tubes in my premier 17LS and 15 with NOS tubes from Kevin at Upscale Audio. The 17LS tubes are quality Sovtek 6922's (not the same as the stock Sovtek's that are included with the 17LS). This made a HUGE improvement in the sound of my system. I replaced the premier 15 tubes with GE long-plate 12AX7's and Mullard 6GK5's. This made an even better improvement in the sound (for vinyl). The nosie problem that I noted in my original post is GONE. The background in now dead silent - even on vinyl. My recommendation - contact Kevin at Upscale Audio. He knows what he is talking about. He know tubes. Trust his judgment. The tubes he suggested for me made all the difference in improving the sound of my system over the stock tubes. Happy Listening!
CJ Premier 15 & 17LS Tube Suggestions
I have been using a conrad-johnson premier 15 phono preamp for about 18 months and just purchased the premier 17LS preamp six months ago. I am very happy with this pair except for what I consider to be excessive tube noise from the stock tubes. With the 17LS set to mid-range (50 on the display), I hear, what I think is excessive tube noise for units at this price range. I haven't had time yet to experiment (too much travel) with different tubes. I am looking for suggestions for low noise tubes (and sources of tubes) that would improve upon the stock tubes I am currently using. Any suggestions for different brands of tubes and where I can get them would be greatly appreciated. Thanks in advance for the help!