Re: Tek 453A


Dave Wise
 

?I had the bad HV cap. I fixed it. Then the transformer failed. I rewound it. If the candidate scope has both faults, you'd better enjoy fixing.


Note: I got that 453 for free. Thanks Rolynn!


Dave Wise

________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of Glenn Little via groups.io <glennmaillist=bellsouth.net@groups.io>
Sent: Sunday, December 27, 2020 6:52 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tek 453A

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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