break in period?

[Phil Nelson]

Maybe I lead a charmed life, but I've not had significant problems with new parts failing or changing value soon after installation. Much more often, an old marginal part will give up the ghost soon after it experiences full operating voltage and the heat of normal operation for the first time in decades.

In my experience, it's more of a "shake down" period than a break-in. That's why restorers give a TV a nice, long bench test after they think they're finished. It's not unusual for a few more little problems to surface during that phase.

Some of the things you mention sound like old parts that finally gave up. The discriminator coil and flyback might have been in bad shape when you got the TV. Breaking in had nothing to do with it -- they finally broke down. It sounds like the old yoke was bad and remained bad. No mystery there, either.

Just my $0.02.

Phil Nelson