开云体育

Hi Wilko,

You are right, CRT screens are sensitive to the environment; steel, magnetic
field of other devices if they are nearby, gravity...but I found the cause.

When I noticed the display problem, I was working on the RF sections and was
concentrating on them.
I think I wasn't paying enough attention.
What I thought was a tilt reversal was perhaps the orientation of the
spectrum, as I regularly changed the instrument's orientation for testing.

Why I say this is that I disassembled everything and placed the display on
the table.
The deflection coils were very stable and glued; they couldn't move.
So, I think I made an observation error regarding the tilt reversal.

I took the measurement with a ruler, and the display was straight.
The metal casing covering this section had been removed before this
measurement, and I demagnetized it, along with all the circuits, before
reassembling.

But when I disassembled it, I noticed that this section had already been
disassembled and unfortunately reassembled incorrectly, and the case
covering the CRT was misaligned, as was the outer frame for the display,
which wasn't properly seated.

I corrected everything, and now my screen is straight.

The positioning of the metal case and the outer frame caused the tilt.
The metal case containing the display was screwed tightly on the left side,
but barely on the right side.
Therefore, the right side was slightly raised above the aluminum frame,
causing the tilt.

Yves