selected preamp tube (RT080)
selected preamp tube 7025 / E83CC (RT030)
selected preamp tube (RT003)
selected preamp tube (RT006)
selected preamp tube (RT009)
selected rectifier tube (RT521)
selected power tubes, pair (RT152)
selected power tubes, quartet (RT154)
selected power tubes, sextet (RT156)
selected power tubes, pair (RT272)
selected power tubes, quartet (RT274)
selected power tubes, pair (RT882)
selected power tubes, quartet (RT884)
selected power tubes, sextet (RT886)
selected rectifier tube (RT521)