www.reelschematic.com www.reelschematic.com 3.4. TEST SET SCHEMATIC DIAGRAM. 3.3.3. ADJUSTING FREQUENCY RANGE. A. The frequency range for the Test Set is 30 to 45 kHz. The audio output is tuned for approximately 3200 Hz. Figure 3.2. is the schematic diagram for the 42A12D Ultra- sonic Test Set.
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