Re: Tek 453A


Glenn Little
 

My first 453 had no trace.
The fault was a 500 pF filter capacitor on the HV line.
The capacitor was a red, possibly epoxy, encased capacitor.
When held up to the light you could see black arc marks inside the capacitor,
I replaced the capacitor with a ceramic one and have had no problems since.
I have found this to be the cause of no trace on a few scopes.

If the price is right, the repair may be simple.

Glenn

On 12/26/2020 11:57 PM, Maurice Smulders wrote:
I can obtain a Tek 453A locally, but it doesn't show a trace, so I have no idea yet what is broken. What would be a good offer for it, and is it usually repairable?

- Maurice



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Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@arrl.net AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

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