R1,R2,R3. maplin code DK47K 47ohm 2 Watt resistors 0.13 each 0.39
OA91 " " OH72P Diode 0.49 " 0.49
C1 " " WW29G 0.01 uF capacitor 0.20 " 0.20
C2 " " WW22Y 0.001 uF " 0.20 " 0.20
SO239 " " BW85G SO239 socket 1.06 " 2.12
RV1 " " UH03D pre-set potentiometer 0.19 " 0.19
M1 " " LB80B panel meter 3.99 " 3.99
S1 " " FF76H 4 pole 3 way switch 1.49 " 1.49
BOX " " LF10L Aloy box 1.99 " 1.99
TOTAL COST 11.06
VAT 1.94
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13.00 + postage