No one must own any Rogue on this site. I asked the same question about a Metis pre-amp and got no responses. For what it's worth, I have a rebuilt ST-70 that uses EL-34's. I've tried the winged SED " C "s and NOS Siemens. I like them both, the winged "c" being a little more tubey sounding. The Siemens have a more neutral sound with more extended highs and bass.
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