Summary of Push-Pull
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Absolare push-pull amplifier user manual.
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2 absolare push-pull amplifier user manual 0.9.
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3 absolare push-pull amplifier user manual 0.9 contents 1. General description .............................................................................................................. 4 2. Safety issues and warnings .................................................................................
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4 absolare push-pull amplifier user manual 0.9 1. General description the absolare push-pull amplifier is a transformer coupled, zero feedback, two chassis monoblock stereo amplifier with an all tube signal path and point-to-point construction. Transformer balanced (xlr) and single-ended (rca) input...
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5 absolare push-pull amplifier user manual 0.9 3. Unpacking and placement the monoblock amplifiers are supplied in separate boxes. After opening the top cover of the box, remove the upper layer of hard foam material. You can then lift the units from the box using the cloth underneath each chassis. F...
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6 absolare push-pull amplifier user manual 0.9 4. Installing the tubes there are total of 5 tubes in each monoblock. Placement of tubes is shown below:.
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7 absolare push-pull amplifier user manual 0.9 845 tubes must be installed in the correct orientation. The small indicator pin on the lower side of the tube base should match the small hole on the right-side of the tube socket, as illustrated in the figure below. Caution: incorrect positioning of 84...
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8 absolare push-pull amplifier user manual 0.9 el34 tubes have a small bump in the center as a key for correct positioning. Align it with the corresponding notch in the tube socket while inserting. 12at7 / ecc81 tube has one missing pin acting as a correct positioning key. Align missing pin with the...
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9 absolare push-pull amplifier user manual 0.9 5. Connecting the cables 5.1. Power cables ac power input is via a standard iec socket. Operating voltage must only be changed by an authorized service agent. The quality of the power cable used will affect the sound quality. 5.2. Signal cables single-e...
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10 absolare push-pull amplifier user manual 0.9 6. Operating the unit 6.1. General operation before turning on the unit be sure that all tubes are installed and all cables connected correctly. If you have changed 845 tubes you should first minimize the bias settings (by rotating to counter-clockwise...
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11 absolare push-pull amplifier user manual 0.9 6.2.1. 845 bias levels you have to adjust left and right 845 tube bias levels separately. Measurement is done via a multimeter at 2v dc (or 2000mv dc) setting. Insert black (-) probe into black socket and red (+) probe into one of the green sockets. Yo...
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12 absolare push-pull amplifier user manual 0.9 6.2.2. El34 bias levels there is no separate bias adjustments for el34 tubes, but the push-pull symmetry is important. With a multimeter at lowest dc volt measurement setting, insert black and red probes into blue sockets. The adjustment point is in be...
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13 absolare push-pull amplifier user manual 0.9 7. Troubleshooting and maintenance surface of the unit is dirty. Clean with a slightly damp cloth. No power light. - check ac line voltage. - check the main fuse. Power light is on but 845 tube heaters are not glowing. - tube orientation is wrong, turn...
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