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7A29: Difference between revisions
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Although the 7A29 has a VARIABLE gain control, this control has the undesirable side-effect of also affecting bandwidth. | Although the 7A29 has a VARIABLE gain control, this control has the undesirable side-effect of also affecting bandwidth. | ||
See bandwidth versus VARIABLE gain plot below. | See bandwidth versus VARIABLE gain plot below. | ||
===Repair issues=== | |||
The input attenuator connected to the Volts/Div switch is very delicate. Three plastic levers actuate The 2x, 10x, and 5x 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! | |||
==Links== | ==Links== | ||