This link refer to a 6C33 amp, very interesting amp:
New at SSI was Rethm's first foray into amplifier design: a 16Wpc single-ended integrated amp called the Gaanam ($7750), built around the Russian 6C33C tube and featuring an outboard power supply, 6922-based preamp stage, and an all-transformer driver stage. Using a Lector CD player and Rethm's own all-silver speaker cable ($1250 for an 8' pair), the combination of Maarga speakers and Gaanam amp sounded spacious, clean, well textured, and very tactile, with fine bass extension and bass color; my impression was that the consistently large crowd of listeners in this room agreed.
