PCB assembly - BAG1

[Tony]

The exact order of assembly will depend on the preference of the builder but convention is to fit the resistors/diodes first followed by capacitors, transistors and ICs in that order.

You'll need a good pair of micro wirecutters, a screwdriver for case assembly, fine sandpaper, 300 and 600+ grit emery paper, metal polish and a 15-25W or temperature regulated soldering iron with a good bit which tins easily (many Chinese cheapos have poor quality bits which will refuse to tin and make poor thermal contact, leaving you gouging at the PCB trying to melt the solder).

After preparing a suitable working space take the PCB and the 10x 680K resistors (blue-grey-yellow) or 2m2 (red red green). Fit these in locations marked for R3,4,5,8,9,20,21,23,24 and 26 as shown:

[Tony]

Fit the 8x 1K2 resistors (brown-red-red) or 1k (brown black red) in locations marked for R6,7,15,17,19,22,25 and 29 as shown:

[Tony]

Fit the 5x 100r resistors (brown-black-brown) or 91r (white-brown-black-gold) in locations marked for R11,12,14 30 and 31 as shown:

[Tony]

Fit the 5K6 resistor (green-blue-red) in the location marked for R1 as shown:

[Tony]

Fit the 270k resistor (red-purple-yellow) or 240k (red yellow yellow) in the location marked for R16 as shown:

[Tony]

Fit the 1k8 (brown-grey-red) or 2k2 (red red red) resistor in the location marked for R28 as shown:

[Tony]

Fit the 2m2 resistor (red red green) in the location marked for R37 as shown:

[Tony]

Last resistors for now - fit the 47k resistors (yellow purple orange) or 24k (red-yellow-orange) in the locations marked for R27,32,33,35 and 36 as shown:

[Tony]

Fit the 11x 1N4148 diodes in locations marked for D8,9,10,11,12,13,14,15,16,18,19 as shown: **NOTE** the band marked on the end of the diode body must face the same way as shown in the photograph, this is also indicated on the PCB with a thick white band.

[Tony]

Fit the brown 10n (marked 103) or 33n (333) ceramic capacitors in locations marked for C1,4 and 22 as shown - DO NOT fit one in the space marked C23, that isn't needed: