At your risk.
Educational Electronics Laboratory.
It is made in a box similar to Monopoly.
70's, 80's game.
Springs are used to secure contact to electronic components.
The amplifier does not have an output transformer.
The germanium transistor is directly coupled to the loudspeaker.
Everything operated on a 9V battery.
C1 100nF
C2 2nF
C3 220uF 10V
C4 1.8nF?
C5 40uF 16V
speaker Sanyo PAN Q GH 8ohm 0.3W
potentiometer: 8.8KOhm
lamp: 14ohm when cold
3 Germanium Transistors, using the diode setting of a digital multimeter they measure:
T1, 9H: BE 0.13V, BC 0.123V
T2, 9o: BE 0.4V, BC 0.142V
T3 7c: BE 0.125V, BC 0.111V
By examining the schematics and internal connections below the springs, the amplifier output stage seems to be an emitter follower capacitor coupled (C3) to the speaker
I fondly remember this game. It gave the opportunity to make my first amplifier. I did not know whether it worked. I did not know how to test it. All I could hear was a click in the small speaker and I thought I had done something wrong.
It all came to life when the radio AM tuner from the bigger game 1002 (102 constructions) was connected and radio could be heard around the room with good quality.
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