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Bill of Materials

# Designator Value Quantity Supplier Part Number Comment
Capacitors, polystyrene
1 C1 180pF 1 Mouser 23PS118 Polystyrene capacitors are becoming obsolete at Mouser. Check LSR at Farnell in EU or SmallBear Electronics in US
2 C2a, C9b 100pF 2 Mouser 23PS110 (obsolete)
3 C2b 220pF 1 Mouser 23PS122
4 C3a, C10b 1500pF 2 Mouser 23PS215
5 C3b 4700pF 1 Mouser 23PS247 (obsolete)
6 C4a, C11b 680pF 2 Mouser 23PS168
7 C5b 330pF 1 Mouser 23PS133
8 C16b, C26a 1000pF 2 Mouser 23PS210
Capacitors, film
9 C9 10n 1 Mouser 150103J400BB Mounted on the output transformer
10 Cp3 0.1uF 1 Mouser MKS2С031001A00KSSD  
Capacitors, tantalum
11 C1a, C1b, C8b 10uF/25V 3 Mouser TAP106K025CCS  
12 C7a, C8a, C14b, C15b 22uF/16V 4 Mouser TAP226K016CCS  
Capacitors, electrolytic (Low ESR recommended)
13 C4, C5, C7, C8 470uF/35V 4 Mouser UPW1V471MPD  
14 C4b, C6b, C7b 80uF/25V 3 Mouser MAL213837101E3 Closest value
15 C5a, C12b 22uF/25V 2 Mouser MAL213826229E3  
16 C6a, C13b 125uF/4V 2 Mouser MAL213834151E3 Closest value
17 C9a, C17b 400uF/4V 2 Mouser MAL213834471E3 Closest value
18 Cp1 1500uF/50V 1 Mouser EKYB500ELL152MM25S  
19 Cp4, Cp5 10uF/50V 2 Mouser UPW1H100MDD  
20 Cp6, Cp7 100uF/63V 2 Mouser UPW1J101MPD  
Resistors (1% recommended, except where noted)
21 R1b, R3, R9a, R17b 2K2 4 Mouser 271-2.2K-RC  
22 R1a, R9b 120K 2 Mouser 271-120K-RC  
23 R8a, R16b, Rp4, Rp8 10K 4 Mouser 271-10K-RC  
24 R2a, R3b, R10b 68K 3 Mouser 271-68K-RC  
25 R2b 56K 1 Mouser 271-56K-RC  
26 R3a, R8b, R11b 33K 3 Mouser 271-33K-RC  
27 R11, R22, Rp1 2K7 3 Mouser 271-2.7K-RC  
28 R14 12K 1 Mouser 271-12K-RC  
29 R4, R5b, R21 3K3 3 Mouser 271-3.3K-RC  
30 R4a, R12b 47K 2 Mouser 271-47K-RC  
31 R4b 1K2 1 Mouser 271-1.2K-RC  
32 R5, R15, R20 3K9 3 Mouser 271-3.9K-RC  
33 R5a, R13b 5K1 2 Mouser 271-5.1K-RC  
34 R6 4K3 1 Mouser MFR50SFTE52-4K3  
35 R6a, R14b 470 2 Mouser 271-470-RC  
36 R6b, R13, R38 18K 3 Mouser 271-18K-RC  
37 R7a, R15b, R44, R64* 1K5 4 Mouser 271-1.5K-RC *Mounted on the output transformer
38 R7b 47, 2W 1 Mouser CPF247R000JKB14  
39 R8 15K 1 Mouser 271-15K-RC  
40 R10 91 1 Mouser 271-91-RC  
41 R10a, R18b 390 2 Mouser 271-390-RC  
42 R11a, R16, R19b 1K8 3 Mouser 271-1.8K-RC  
43 R12a, R20b 51K 2 Mouser 271-51K-RC  
44 R17 1K 1 Mouser 271-1K-RC  
45 R18 510 1 Mouser 271-510-RC  
46 R29 120 1 Mouser 271-120-RC  
47 R30 330 1 Mouser 271-330-RC  
48 R51 270, 1W 1 Mouser CPF1270R00FKB14  
49 R56 12, 1W 1 Mouser CPF112R000FKB14  
50 Rp2 150 1 Mouser 271-150-RC  
51 Rp3 100K 1 Mouser 271-100K-RC  
52 Rp6, Rp7 6K81, 0.1% 2 Mouser RC55LF-D-6K81-B-B  
53 Rp9 1M 1 Mouser 271-1.0M-RC  
Trimmer resistors
54 RV1b 4K7 1 Mouser T93YB502KT20 Closest value
Potentiometers
55 Out trim 5K, log 1 Mouser 53CAA-E28-D13L  
Semiconductors
56 Dp1, Dp2 1N4007 2 Mouser 1N4007GP-E3/54  
57 Qp1 BC546 1 Mouser BC546ABU  
58 Qp2 MPSA06 1 Mouser MPSA06  
59 Qp3 MPSA56 1 Mouser MPSA56  
60 T1a, T1b, T4b BC184C 3 Obsolete   hfe>600. Can be substituted with BC550C
61 T2a, T3a, T2b, T5b, T6b BC184C 5 Obsolete   Can be substituted with BC550C
62 T3b 2N3055 1 Mouser 2N3055AG  
63 VRp1 LM317 1 Mouser LM317T  
64 Power On LED   1 Mouser W23GD Or any other 2mm green LED
Switches
65 Impedance, Phase Toggle, DPDT 2 Mouser 108-1MD1T1B1M1QE-EVX  
66 Phantom Toggle, SPDT 1 Mouser 108-1MS1T1B1M1QE-EVX  
67 Gain Rotary, 12 pos. 3 pole 1 AML GR-03-001 Available also at Mouser:
71BDF30-03PAJN
Transformers

68

VTB9045   1 AML CA-18-VTB9045  
69 VTB1148   1 AML CA-18-VTB1148  
Heatsinks
70 TO-220 heatsink   1 Mouser 637-10ABPE  
71 TO-3 heatsink   1 Mouser 575703B00000G  
Knobs
72 Burgundy Marconi-Skirted Pointer   1 ClassicAPI CAE037748-Burgundy Or any other knob with outer diameter 25.4mm (1") and shaft size 6.3mm (1/4")
73 Fluted Grey-Inner Concentric   1 ClassicAPI CAE038038 Or any other knob with outer diameter 17.2mm (0.675") and shaft size 3.2mm (1/8")
Connectors
74 Mic input XLR, Female 1 Mouser NC3FD-LX-B Or any other Neutrik Series D/DL/DLX female XLR
75 Line output XLR, Male 1 Mouser NC3MD-LX-B Or any other Neutrik Series D/DL/DLX male XLR
Other
76 Ground lug for input transformer   1 Mouser 7312  
77 Standoff, 5mm, F/F (PCBs mounting)   4 Mouser R30-1000502 We used threaded rivet nuts instead. Refer to Metalworking pages of the 1073 Guide for further information.
78 Standoff, 5mm, F/F (2N3055 heatsink mounting)   2 Mouser R30-1000502  
79 Standoff, 20mm, F/F (for input transformer mounting)   3 Mouser R30-1002002  
80 Standoff, 25mm, F/F (for output transformer mounting)   2 Mouser R30-1002502  
81 Standoff, unthreaded, nylon, M3 clearance x 3mm (front panel spacer)   4 Mouser R30-6700394  
82 1290 Module PCBs set   1 RackNeve 1290PCB  
83 1290 Module front panel and mounting kit   1 RackNeve 1290FP