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SPECIFICATIONS

Gain

17 dB (all internal switches = 0n)

12 dB  (switches 3, 4 = On)

6 dB   (switches 2, 5 = On)

0 dB  (switches 1, 6 = On)

Freq. Response

+0, -3 dB @ 10 Hz  and 100 kHz

Distortion

< .2 % THD typically .02% @ 1 volt @ 1KHZ

Maximum Output

10 volts rms.

Output Impedance

0 - 750 ohms

Input Impedance

20 Kohm, 6.5 dB gain setting (default)

10 Kohm, 13.4 dB gain setting

Output Noise

less than 10 microvolts, unweighted 20-20khz

Power Consumption

15 watts

Dimensions

12 " W  x  11.5 “ D  x  4" H

Shipping Weight

22 lb.

Pass Laboratories

Foresthill  CA  95631

tel (

530

)  367  3690

fax (

530

)  367  2193

Summary of Contents for Aleph L

Page 1: ...Pass Laboratories Aleph L Service Manual...

Page 2: ...controlled by the circuits of Q2 and Q3 For the relay to activate both Q2 and Q3 must be conducting Q3 turns on slowly via the charge on C5 while Q2 will only conduct when there is at least 8 volts d...

Page 3: ...C101 10UF R107 6 81K S2 0 DB C 2 C 1 6 DB C 2 C 1 12 DB C 2 C 1 R104 221K 10K R101 22 1K R102 47 5K R103 9 1V Z101 9 1V Z102 OUTPUT 2 INPUT 1 INPUT 2 INPUT 3 INPUT 4 9 1V Z7 9 1V Z6 9 1V Z5 9 1V Z4 9...

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Page 7: ...typically 02 1 volt 1KHZ Maximum Output 10 volts rms Output Impedance 0 750 ohms Input Impedance 20 Kohm 6 5 dB gain setting default 10 Kohm 13 4 dB gain setting Output Noise less than 10 microvolts u...

Page 8: ...Pass Laboratories Aleph L Service Manual Rev 1 2 9 26 96...

Page 9: ...ed DC into C1 which is then passively filtered and then actively regulated down to about 60 volts at the output of Q1 Q1 is driven by a stack of Zener diodes and the regulated output is additionally f...

Page 10: ...10 IRF9610 Q102 S D G R109 221K C104 220uF IRF610 Q101 S D G R104 221 C101 10UF R107 221K 9 1V Z101 9 1V Z102 OUTPUT 2 INPUT 1 INPUT 2 INPUT 3 INPUT 4 9 1V Z7 9 1V Z6 9 1V Z5 9 1V Z4 9 1V Z3 OUTPUT 1...

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Page 15: ...doing the conversion To update the Aleph L from rev 1 0 to either rev 1 1 is a simple matter of replacing the main board with two minor exceptions 1 R212 must be 562 see attached drawing for location...

Page 16: ...aximum Output 10 volts rms Output Impedance 0 750 ohms Input Impedance 20 Kohm Output Noise less than 10 microvolts unweighted 20 20khz Power Consumption 15 watts Dimensions 12 W x 11 5 D x 4 H Shippi...

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