I've bought many tubes from Brett Jesse and gotten great support. He tends to focus mostly on obscure NOS (and expensive) tubes.
Recently I've bought quite a bit of tubes from the Tube Depot and have been very impressed with their service, selection, and prices. The Tube Depot mostly focuses on new production tubes, so the prices are generally pretty attractive.
Recently I've bought quite a bit of tubes from the Tube Depot and have been very impressed with their service, selection, and prices. The Tube Depot mostly focuses on new production tubes, so the prices are generally pretty attractive.