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Summary of Contents for Analog Metric 2A3 SE
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Page 1: User Manual
2A3 SE Valve Amplifier Kit User Manual Analog Metric www.analogmetric.com sales@analogmetric.com Copyright© 2012 All Rights Reserved www.analogmetric.com... - Page 2 [2A3 SE Valve Amplifier Kit] Analog Metric www.analogmetric.com...
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Page 3: Specification
[2A3 SE Valve Amplifier Kit] Analog Metric SPECIFICATION Vacuum tubes: two 2A3 and two 6SN7 vacuum tubes. ● Voltage gain: 1.7dB ● Gain flatness: <0.9dB for 20-20kHz ● 3-dB Bandwidth: 31.2kHz ● Frequency range: 20-20kHz ● Input Impedance: 87k Ohms ●... - Page 4 [2A3 SE Valve Amplifier Kit] Analog Metric >110dB (5W, 8 ohms, 1kHz, a-weighted) THD+N < 4% @1kHz ● Maximum Output Power: 5W at 8 Ohms ● Output transformer 10-15W: ● Primary impedance: 2.5k/3.5k Ohms 120mA Secondary impedance: 4, 8 and 16 Ohms Stereo single-end input and output ●...
- Page 5 [2A3 SE Valve Amplifier Kit] Analog Metric 1. Solder the resistors on the top of the board. The resistance label of the Dale resistors should face upward for easy of future debugging or modification. 2. Notice to the direction of the electrolytic capacitors C1, C3-5, C7, and C8 (the positive terminals are marked by red circle as shown in Figure 1).
- Page 6 [2A3 SE Valve Amplifier Kit] Analog Metric 3. Solder the tube sockets. The bigger holes of the 4-Pin plate sockets correspond to the PIN1 and PIN4 of 2A3 (tube filament voltage). The direction of the 8-Pin octal tube sockets for 6SN7 match with the screen silk of the board as in Figure 2.
- Page 7 [2A3 SE Valve Amplifier Kit] Analog Metric on the power supply. Turn off the power supply if there is a suddenly dropping in the supply voltage at P1, H1, and H2, or HL. 6. Adjust the cathode current Ic by the resistor trimmer VR1 and VR1B as in Figure 3.
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Page 8: Troubleshooting
[2A3 SE Valve Amplifier Kit] Analog Metric TROUBLESHOOTING VCC for B+ HL for 6SN7 H1/H2 www.analogmetric.com... - Page 9 [2A3 SE Valve Amplifier Kit] Analog Metric www.analogmetric.com...
- Page 10 [2A3 SE Valve Amplifier Kit] Analog Metric www.analogmetric.com...
- Page 11 [2A3 SE Valve Amplifier Kit] Analog Metric www.analogmetric.com...
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