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Old 26th May 2010, 6:07 pm   #119
dominicbeesley
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Join Date: Nov 2004
Location: Hebden Bridge, West Yorkshire, UK.
Posts: 1,885
Default Re: Oh no - another V4!

Hi Lads,

Had a spare twenty minutes so went down, resoldered the EHT lead and put the cage back on.

Twiddling the line drive trimmer C101 gave the following results...

All the way out as pictured below: bright with more EHT (had to readjust height controls) and sharp pictures and full width but wobbly verticals

Mid way: dimmer narrower picture - no sign of "kink", less wobbly verticals still a reasonable picture

All way in: very weak looking EHT line wouldn't lock, dim picture at about 3/5 width

No sign of any kink and these all tried with C99 subbed by a 100pF cap.

This all with width control turned fully up (i.e. iron core all the way in).

What to check next? Or should I just leave it!? I'd really like to get this running 100% though - including the width control near the middle!

How to check the width control coil or should I just rewind it!?

Cheers

Dom
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