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Now the buzzer LS1 to fit. Note the + faces UP on the PCB markings:

Carefully fit the USB socket, it may be a little tight but don't push too much or you may damage the pins. Fit the 3.5mm jack socket marked SK2:

Fit the green aluminium can 330 or 470u capacitor in the location marked for C8 as shown: NOTE this is polarised, the negative- terminal is marked with a white band. This faces towards the BACK/TOP of the PCB when viewed as shown. Try and leave enough room on the right of it for R13 to be fitted. ht...

Fit the aluminium can 3.3u 200/250V capacitor in the location marked for C6 as shown - the white bar on the side of the capacitor indicated the negative- terminal and faces to the *right*:

Fit the green resin 4n7 capacitor in the location marked for C7 as shown:

Fit the black plastic transistors marked 'MPSA42' or 'KSP42' in locations marked for T2,4,6,8,10 and 11 as shown: NOTE these are polarised and must be fitted the right way round. There is a flat mark on one side of the body, this flat side faces to the RIGHT of the PCB when viewed as shown in the ph...

Fit the black plastic transistors x5 marked 'MPSA92' or '2N6520**' in locations marked for T1,3,5,7 and 9 as shown: NOTE these are polarised and must be fitted the right way round. There is a flat mark on one side of the body, this flat side faces to the LEFT of the PCB when viewed as shown in the p...

Now assemble the nixie tube sockets. NOTE that from 2021- many kits will be supplied without the sockets due to some constructors becoming frustrated trying to get nixie leads into them. In this case, skip this step for now until the rest of the PCB is completed. Using wirecutters or pliers carefull...

Fit the 5x 24k (red yellow orange) resistors in places R27, 32,33,35 and 36:

Fit the yellow plastic .22u capacitors x5 in locations marked for C9,10,11,12 and 13 as shown: