I use this rectifier tube in a home built 5E3-style amp and the sound great. The 274B is significantly less spongy than the standard 5Y3GT that is usually found in that circuit. The 274B adds headroom, clean(-ish) tones and volume. I would recommend this experiment with 6V6's that can take punishment. I've tested with EHX, TAD, Tung-Sol and Mullard (even though the Tung-Sols and Mullards are not known for being particularly rugged). Right now I'm switching between Tung-Sols and Mullards.