HOW TO TEST YOURSELF
Materials needed:
shoe box
tape
nail
pointed knife
cheap wire stripper (if needed)
paper clip
Parts List
Item Radio Shack Catalog Number
(a) Ordinary light switch
(b) Potentiometer (variable resistor), 50k
ohms
271-1716
(c) Knob to fit the potentiometer 274-428 (package of 2, you only
need one, or just wind some
masking tape around the shaft in a
wad)
(d) .1 microfarad ceramic disk capacitor 272-1432A
(e) .0047 microfarad ceramic disk ca-
pacitor (.005 will do)
272-130
(f) MPS2907 PNP silicon transistor or
equivalent
276-2023
(g) Audio output transformer 900 CT: 8
ohm
273-1380
(h) 3 size AA batteries
(i) Battery holder for 4 AA's (3 AA battery
holder will do)
270-391 has 2 wires coming away
from it, one red (for +), one black
(for -).
(j) Microclip test jumpers 278-017 (you need 6 packages of
two)
Directions
- Get a shoe box, save the lid, photocopy the picture in this
book and tape it to the bottom (inside) of the box.