As the gods of post-Covid scheduling would have it, we visited two gigs originally planned for 2020 at the same venue, Jahrhunderthalle Frankfurt (Germany), within four days.
The first was our third Australian Pink Floyd Show within 5 years with the band doing their best to replay older songs...
My Ypsilon Aelius II have got 2 kinds of tubes in the input: EZ81rectifier tube by JJ and a EC8010 NOS by Siemens. A socket on the same input board labeled "6c4p" remains empty. (A leftover from updating version 1 to 2? (I bought 2nd hand.))
I just ordered a matched pair of EZ81/6CA4 NOS by...