Re: 547 Restoration conundrum #photo-notice
If there is damage internal to the CRT it might be possible to use external magnets (small) to make corrections. It would take a considerable amount of experimentation.toggle quoted messageShow quoted text
Leon Robinson K5JLR
-------- Original message --------
From: "Michael W. Lynch via groups.io" <email@example.com>
Date: 05/21/2021 9:45 AM (GMT-06:00)
Subject: Re: [TekScopes] 547 Restoration conundrum #photo-notice
On Mon, May 17, 2021 at 07:49 PM, Jason A. wrote:
I had a 475 that had a similar defect in the trace.
Link to discussion here: https://groups.io/g/TekScopes/message/170272
I ultimately discovered that one of the glass support rods in the gun assembly had been broken by an impact at some time in the past.
Link to Photos on TEKScopes here: https://groups.io/g/TekScopes/album?id=251792
Before you spend a lot of time looking at the electronics and trying to adjust the defect out of the scope , I would suggest a careful examination of the CRT for some sort of internal damage. As I learned in this instance, a CRT can be damaged ever so slightly inside and still produce a fine looking trace, but one that is also useless because of the distortion. I hope that this is not your problem.
Best of luck to you.