Hi Guys,
Sorry for the delayed expressions of appreciation for your input. I have done a bit more homework. The tubes I am considering rolling are 4 6SN7 WGTA's in the separate control unit, not the power supply. I do not know the significance of the WGTA suffix as opposed to the myriad of other 6SN7's or whether the suffix determines the range of substitutes.
The OPAL is super fast, with huge bandwith and a tendency to the cool, highly transparent side, unusual for a tube pre. I am very happy with it as is, but would like to see if I could get a BIT more warmth and body, without losing too much of the speed and transparency. It is coupled with a Krell FPB 300cx and von Schweikert VR5 HSE's, and sometimes there is a bit too much transparency, if there is such a thing. I know there are always tradeoffs.
With that in mind, I would be willing to spend up to $100/tube and would apprecate any specific recommendations you have and what changes I would likely hear. Also, if you could suggest reliable and knowledgeable tube vendors, that would be helpful.
Many thanks from a newbie tube roller.
Neal
Sorry for the delayed expressions of appreciation for your input. I have done a bit more homework. The tubes I am considering rolling are 4 6SN7 WGTA's in the separate control unit, not the power supply. I do not know the significance of the WGTA suffix as opposed to the myriad of other 6SN7's or whether the suffix determines the range of substitutes.
The OPAL is super fast, with huge bandwith and a tendency to the cool, highly transparent side, unusual for a tube pre. I am very happy with it as is, but would like to see if I could get a BIT more warmth and body, without losing too much of the speed and transparency. It is coupled with a Krell FPB 300cx and von Schweikert VR5 HSE's, and sometimes there is a bit too much transparency, if there is such a thing. I know there are always tradeoffs.
With that in mind, I would be willing to spend up to $100/tube and would apprecate any specific recommendations you have and what changes I would likely hear. Also, if you could suggest reliable and knowledgeable tube vendors, that would be helpful.
Many thanks from a newbie tube roller.
Neal