It’s official! I have a NOS tube problem:
Torii MKV:
Westinghouse OA3 Regulator Tubes
Mullard 5AR4 Rectifier Tubes
Siemens CCA Preamp driver tubes
Voshkod 6N1P Preamp Current multiplier tubes
GEC KT88 Power Tubes
Rogue RP-7 Preamp:
Mullard ECC88 tubes from preamp