Tektronix 454A scope from ~1971
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Tektronix 475A and DM44 Repair Power Supply and Logic
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Gale Morris on the history of the Tektronix 453 Oscilloscope
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Pioneer Twin-Tray Compact Disc Player PD-T507
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Tektronix TDS754D CRT to TFT LCD Conversion
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Heathkit GR-81 Receiver.
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Tektronix 475A Trigger Transistor Testing 151 0367 00
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#122 - Tektronix TDS5054B-NV-AV oscilloscope repair
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