Rectifiers next, but will take me longer to complete comparing and post findings.
Valve Art 274B
RCA 5Y3 GT (on the way)
The stock output tubes are growing on me quite a lot, any suggestions of what may work better? I only have a pair of Amperex EL84 at the moment and the Russian 6P15P-ER (the special long life edition, gold plates). The latter however are new and in dire need of burn-in which isn't a priority for me yet.