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LampizatOr- The Horizon DAC Manual
Rectifiers are generally less rolled but many customers report that huge leaps in synergy
can be achieved when, after choosing the optimal music tubes, we also choose optimal
rectifier.
Directly heated dual diodes are older in design, physically larger, and have 4 pins versus
5 and use 5V heaters versus 6,3 compared to Indirectly heater rectifiers.
PINOUT: 2-8 is heater 5,0 V AC. Pin 8 (or 2) is also cathode. Pins 4 and 6 are two
anodes. To test - just use a meter and check resistance in ohms between the pins. IN A
RECTIFIER THE ONLY TWO PINS WHICH SHOW ANY OHM READING AT ALL, ARE
HEATER PINS. THE READING SHOULD BE IN SINGLE OHMS like 2 Ohm.
Some people report back that the directly heated diodes sound better than their indirectly
heated counterparts, but this hasn't been verified in any semi scientific way. Generally we
expect the directly heated diodes to have up to 400% higher current capability as well as
voltage max. It al depends on the DEMAND of our circuit. Some Lampizator tube stages
demand only 2 mA in total, some can demand 40mA and more. Horizon DAC demand in
total for 2 channels is 80 mA.
Rectifiers compatible: 274B, 5c3s, 5Y3, 5r4, 5U4G, GZ34, 5c4s, 5u4c
To change music tubes you must switch off the amp. DAC can continue to work.
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