I have an SET Korneff 45 which can also use 2A3's and a Push Pull PVK 2A3 monobloc built around an amazing pair of '50's vintage Chicago outuput transformers. I have experimented with most 2A3s (except the very expensive ~ $1K/pair-but somewhat fragile single plate RCAs) including NOS dual plate RCA's, Sovtek 2A3's, AVVT mesh plate 2A3/s, Sophia Mesh plate 2A3's and the TJ Full Music 300B/2.5v drop ins. In the SET Korneff the RCA dual plate were the best. The Sovtek are great for the money. The AVVT are extremely detailed and have lot of punch but slightly less warm than the others. The Sophias are just slightly behind the NOS RCA's. In the push pull a quad of the NOS RCA dual plate are by far the best all around. The AVVT and Sophias are a close second and the Sovtek third but again the best bargain. The 300B/2.5 are great but just different with more of the 300B lushness but slightly less of the 2A3 delicacy. They are all great tubes and I am probably just splitting hairs between 9's and 9.9 on a scale of 1-10.
