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Problem with Tektronix 2221A

Discussion in 'Troubleshooting and Repair' started by semaj1957, Jun 27, 2010.

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  1. semaj1957


    Jun 27, 2010
    I have a Tektronix 2221A oscilloscope It displays well until it gets down to a signal 2 divisions high then seems to drop off to nothing. Has anybody had this problem before and can tell me where to start looking. It came from a technical college and I am thinking that at sometime someone overvoltage it.
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