FM Radio Essentials
www.kitronik.co.uk/2135
Build Instructions
Before you start, take a look at the Printed Circuit Board (PCB). The components go in the side with the writing on
and the solder goes on the side with the tracks and silver pads.
Start with the eight resistors:
The text on the PCB shows where R1, R2 etc go.
Ensure that you put the resistors in the right place.
PCB Ref
Value
Colour Bands
R2 & R8
10K
Brown, black, orange
R3 & R4
100K
Brown, black, yellow
R6
4.7K
Yellow, purple, red
R7
15K
Brown, green, orange
R9
100
Brown, black, brown
R10
1
Brown, black, gold
The ceramic disc capacitors should be soldered into the board. There are a lot of these so be careful to put them all
in the correct place. The capacitors can be identified by the text printed on them (see close up image below right). It
doesn t matter which way around the capacitor goes into the board.
Solder the voltage regulator (shown right) into the PCB where it is labelled IC2. Make sure that the
shape of the component matches the outline on the PCB.
PCB Ref
Value
Text
C1, C9, C15, C18
100nF
104
C2, C12, C19, C20
10nF
103
C3 & C5
3.3nF
332
C4, C6, C16
180pF
181
C7
39pF
39
C8
2.2nF
222
C10
330pF
331
C11
220pF
221
C13
220nF
224
C14
470pF
471
PLACE RESISTORS
1
SOLDER THE CERAMIC DISC CAPACITORS
2
SOLDER THE VOLTAGE REGULATOR
3
