Hi Howard. I used to use a pair of wright 3.5 monos to drive the tweeter in my Tannoy Westminsters. I agree the sovtek 2a3 is a good sounding valve in the wrights. The Nos rca 2a3 mono plate or bi-plate tubes should not be any noisier than your sovteks. Perhaps the ones you received were just inherently noisey examples.My Westminsters are extremely critical of noisey amplification due to their high efficiency and horn loaded tweeters.To be candid here: To begin with.... the nos bi-plate rca 2a3 is certainly not leaps and bounds better than the sovtek anyway but the mono plate rca is really in a different league. That said: The choice of the 6sn7 in the monos will have a much bigger influence on the "voice" of the amplifier regardless of what 2a3 you choose to employ. The nasty sounding russian 6sn7gt will simply cripple your amp. The currently chineese 6sn7gt tall bottle will give you a more relaxed presentation but still lacks the soul and resolution of most of the nos 6sn7 examples, but one must be careful with selecting low noise and non microphonic examples as many of the nos examples are prone to microphonics. Personally speaking here.... I would invest in a quality nos 6sn7 long before even cosidering nos 2a3's. A nos tung sol 6sn7 round plate or Kenrad vt-231, RCA grey glass vt-231 [ to name a few ] when driving the sovtek 2a3 will handily stomp all over the legendary rca mono plate 2a3 if its paired with any current examples of the 6sn7 dual triodes.
7 responses Add your response