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7A29: Difference between revisions
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{{Spec | Options | Option 4: variable delay (1 ns) }} | {{Spec | Options | Option 4: variable delay (1 ns) }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Links== | |||
* [http://www.eevblog.com/forum/testgear/tektronix-7a29-teardown/ Tektronix 7A29 teardown - nice detailed pictures of attenuator internals] | |||
* [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_amplifier/amplifier_7A29.htm Tek 7A29 @ amplifier.cd] including internal pictures | |||
* [https://youtu.be/yyg9qqE3JOk Tek 7A26 Lab Checkin] A special warning about permanent damage @ Zenwizard Studios | |||
{{Documents|Link=7A29}} | |||
==Internals== | ==Internals== | ||
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===Repair issues=== | ===Repair issues=== | ||
The input attenuator connected to the Volts/Div switch is very delicate. Three plastic levers actuate the ×2, ×10, and ×5 attenuator switches. Small metal rollers are clipped into the plastic levers and ride on cams. The plastic clips did not age well and have become very brittle. Combined with lack of lubrication on the metal rollers this often leads to broken plastic clips and missing rollers. Do not operate a stiff Volts/Div switch and lubricate rollers before use! | The input attenuator connected to the Volts/Div switch is very delicate. Three plastic levers actuate the ×2, ×10, and ×5 attenuator switches. Small metal rollers are clipped into the plastic levers and ride on cams. The plastic clips did not age well and have become very brittle. Combined with lack of lubrication on the metal rollers this often leads to broken plastic clips and missing rollers. Do not operate a stiff Volts/Div switch and lubricate rollers before use! | ||
==Prices== | ==Prices== | ||