Hello,
There was also an entire batch/lot of problem 465B crts from back in the day. One of the problems was spot size and ability to focus. Many were replaced under warranty by Tek.
I remember looking a quite a few 465Bs with this problem at a local cal lab.
Bernice
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--- On Wed, 10/1/08, Jordan Kersten <jordankersten@...> wrote:
From: Jordan Kersten <jordankersten@...>
Subject: [TekScopes] Tek 465B blurry CRT.
To: TekScopes@...
Date: Wednesday, October 1, 2008, 10:39 PM
My 465b won't focus quite as clear as it should. Doesn't matter where I adjust the focus or astig control. It looks like there is a ghost image of whatever I am measuring. So the trace/waveform becomes larger/wider than it should. I don't think it is physical damage inside the CRT because the "out of focus" is uniform and does not change at all when you change the trace position.
~Jordan~
