Lampizator Mono Blocks SE GM 70 tube amplifier

Specification of GM70 version: • Single Ended triode mono block integrated amp (no need for a preamp) • Rectifier tube 5C3S - the giant coke bottle dual diode. (It supplies the small tube section) • dimensions WHD : 450 x 140 (250 with tubes) x 500 mm • weight: net 29 kg per each mono before packing (33 kg packed) • Gross shipping weight of a pair: 77 kg (170 lbs) • Power: 22 WPC single ended class A • Power consumption: 180 WPC on idle, • 95 W on pre-heating (per each block) • Power Tube: GM70 triode, graphite type • Driver: White-6N6P (at 30 mA) - NOS • Input tube ECC40 Mullard - NOS • Input impedance: 90 K • Output impedance (speakers recommended) 8 Ohm • Output transformer: OGONOWSKI / Lampizator • High Voltage transformer: Ogonowski (using audio output transformer core ) • Volume: Stepped input ladder switch (24 SMD resistor pairs) • Power transformers total capacity: 700 VA. 4 transformers in total per side • Anode supply: 900 V DC • Input socket topology: one RCA SE (second input possible) • Biasing range: -60 to -140 V DC (covers both copper and graphite GM70s The amplifier employs only the most radically “kosher” circuit features like: • Single ended triode operation from input to output • Pure Class A • Zero feedback, neither local nor global • Zero solid state parts in audio circuits • Unregulated and over specified supplies • Separate transformers for each task (four in total per side) • Short signal path - from RCA to pot - 2 inches of silver wire, same from pot to first tube, same from the first to the second tube and a hop across one capacitor to main tube without additional wiring. • Power tube bias current is monitored on analog needle meter • No need for triode matching as the bias is set manually. • There is a possibility to compensate aging drift on power tubes • Pre-heating operation mode for tube (and for electricity saving) • Pots can be bypassed completely by toggle switch for the “power amp” operation mode. The amplifier is in Lithuania in art gallery at the moment but can be shipped free of charge.