Lovely new set of valves from @tubeampdoctor. It’s their recommended set for this amp. They know a lot more about this than me, so happy to trust their judgement.
First preamp valve swapped. https://t.co/V6k3wHpo3c
Top tip: None of these valves were bad as such, so put each of the old ones, label the box with where they go, then tape them all to the bottom/side of the amp so you have emergency spares at gigs. https://t.co/mgmlOR0OHy