ANK L5, Construction Manual

Page: 37 / 76

Copyright © 2019 AudioNote Kits
www.AudioNoteKits.com
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Page 37
5.2 Parts List
Quantity Designation Description Part Number
1 PCB
2 B1, B3 Bridge Rectifier GBU4M-BPMS-MD
4 C1, C2, C7, C8 4700uf 25v cap 604-1058-nd
2 Heat Sink FA-T220-25E
2 IC1, IC3 Regulator LT1963AE
2 R5, R1 1K A105957CT-ND
2 R6, R2 4K
6
PPC14.0KXCT-ND
2 C5, C9 47uf 604-1054-ND
2 on heat sink HS pads 926-1475-nd
5.3 Installing the PCB Resistors
A quick lesson about resistors:

A resistor that reads 100R means that it is 100 ohms; the 'R' stands for resistance

A resistor that reads 2K7 means it is 2700 ohms; the 'R' is assumed and the K (which stands for
Kilo or 1000) is positioned like the decimal place, so it's like reading 2.7K ohms (K = multiplied
by 1000) — but it's shortened to 2K7

Another example is the 1M resistor, which is 1 Mega ohms
Use an ohmmeter to measure each resistor to verify its correct value. We've included a resistor chart
in the Appendix.
It's a good idea to orient your resistors so that the color codes can be read from left to right; it makes
it easier to spot any issues.
It’s also a good idea to not have the resistors installed right against the
board
, for a couple of reasons: 1) it's better for heat dissipation, and 2) in some cases there are circuit
traces running under the resistors — and we really don't want resistors touching them. So, as shown
below (on a board from a different kit), we recommend using a narrow piece of cardboard cut to size
as a 2–3mm spacer: this will still let you solder while ensuring that the resistor is not pressing
against the board.
6
The resistors for R1 and R2 need a ratio of 4:1.