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Published in issue 344, June 2005

Resistors:

R1,R3 = 10k

R2,R4 = 100k

R5 = 1k

Capacitors:

C1,C3,C4 = 10µF 16V radial

C2 = 220µF 16V radial

Semiconductors:

T1,T2,T3 = BC547B (for T1 also BC549C, see text)

Miscellaneous:

S1 = on/off switch, 1 contact

Bt1 = AA battery (preferably alkali-manganese) with holder

K1 = 3.5-mm jack socket, stereo (see text)

K2 = 3-way PCB terminal block, 5mm lead pitch

PCB, ref. 040424-1 from the PCBShop

L1 = pickup coil, if necessary with ferrite core (see text)

ANT = length of wire (see text)