I agree with Jazdoc. I will have a DHT preamp which can use any of these tubes 101D, 26, 226, 326 out next month. All point to point wiring, transformer volume control and custom made transformers which after trying out more than I can count on one hand, hopefully gives my product the edge over all other similar DHT preamps. In many comparison tests, the custom wound transformer was so much better sonically. Once you get the capacitors out of the signal path, the clarity, detail and micro dynamics really are stunning. IMO you also don't have to chase sound from ICs, power cords, power conditioners, as much because the preamp provides most of what they did in my past systems..
Happy Listening.