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#9
01-19-2005, 09:18 PM
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The TRK-12 has adequate range on the horizontal hold control to operate at 15,750 Hz. The output stage is less efficient at that frequency, so the width is marginal, but most TRK-12s have enough.
Another difference is that prewar TVs used AM sound. They will work with NTSC by aligning the audio IF and detector stages for slope detection. 
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