A and T Labs K6, Assembly Manual, Page: 10 / 44

A and T Labs K6 Audio Power Amplifier Assembly Manual
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2001 A and T Labs Inc. AMK6a
8
R31 681 Blu-grey-brn-brn R71 1.21K Brn-blk-brn-brn
R32 1K Brn-blk-blk-brn R72 27.4K Red-viol-yel-red
R33 2K, 5W See note 1 R73 * 46.4K Yel-blu-yel-red
R34 2K, 5W See note 1 R74 * 46.4K Yel-blu-yel-red
R35 50 Grn-blk-blk-gold R75** 46.4K Yel-blu-yel-red
R36 1.5K, 2W R76** 46.4K Yel-blu-yel-red
R37 5.1K, 1/2W Grn-brn-brn-brn R77** 46.4K Yel-blu-yel-red
R38 10K Brn-blk-blk-red R78 * 5.11K Grn-brn-brn-brn
R39 825K Grey-red-grn-or R79 *** 200 Red-blk-blk-blk
R40 825K Grey-red-grn-or R80 *** 200 Red-blk-blk-blk
Note 1: Mount R25, 27, 33, and 34 ¼” off the board for better airflow/heat dissipation.
* Parts required for bridging option
** Parts required for differential input
*** Parts required for extra output transistor option
3.1.2 Capacitors:
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Part Value
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Part Value
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Part Value
C1 10uf 50V C9 .22uf C17 10uf 35v
C2 150pf C10 10uf 35v C18 1500pf
C3 100uf 50v C11 10uf 35v C19 1uf 35v
C4 100uf 50v C12 .1uf 100v C20* 82pf
C5 .1uf, 100v C13 100uf 100v C21* .01UF
C6 150pf C14 .1uf 100v C22* .01UF
C7 82pf C15 100uf 100v C23** 82pf
C8 .22uf C16 10uf 35v C24** 82pf
* Parts required for bridging option
** Parts required for differential input
3.1.3 Diodes:
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Part Type
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Part Type
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Part Type
D1 1N4148 D6 1N4742A D11 1N4742A
D2 1N4148 D7 1N4744A D12 1N4002
D3 1N4728A D8 1N4744A D13 1N4002
D4 1N4728A D9 1N4740A D14 1N4002
D5 1N4742A D10 1N4742A D15 1N4742A
Next, install small signal transistors and ICs. Adjust R18 to its approximate middle
position. Note: Q24 will be installed later, in section 4.3.