I second Maxmads' suggestion re the NOS Tesla EL 34s. There is some info on an Audiosociety shootout against a host of tubes in blind tests in which they came out on top. I hopefully can find the file of the shootout and post it.
EL34 upgrade
I'm currently experimenting with my Jolida JD302B and various tubes. I have 3 makes and each are vastly different from each. In terms of preference I would order them as such: (1) Svetlana, (2) Sovtek, (3) Shuguang. They are all the budget versions. I am considering upgrading to either the SED Winged C or Gold Lion Reissue. So my question, is whether I would expect improvements to the preferred Svetlana? I have a pricepoint of $200 for a matched quad and not sure whether I need to go higher to really hear a difference. Also I'm sure I'm sure there are others, so please weigh them in as well.
-JerseyWalt
-JerseyWalt