NORCAL 2N2/XX Assembly Manual page 24

Test – Connect a speaker or headphones to the "SPKR" jack. Apply power to the PCB. Connect
an RF probe or oscilloscope to the top of resistor R39. The RF probe should show an output
level of approximately 0.25 volts. On the oscilloscope, the waveform should approximately
match that shown in the next figure.
- Figure 27 -
- Figure 28 -
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