Why is the CRT taking longer to light up?

[Tubejunke]

Originally Posted by Magnavox300

Thanks for all the replies,
after tapping on a few things in the back,
the screen now comes up right away...
Not sure what it was, maybe the CRT plug as Tubejunke thought,
though it was on tight. Magnavox300

This may have been one of the most valuable lessons that you will learn in this hobby, and frankly I think you learned it the easiest way; with a c.r.t. I say this because with a c.r.t. you get to see the fix on the screen. Tubes have a pretty big design flaw being pins and sockets made of varying qualities of metal, most of which oxidizes over time.

Everything can appear to be "tight" and is in many cases like this where the plastic locating plug is the primary anchoring point. Meanwhile you have electronic connections often marginal at best or even open as would be the case here with the final possibility of voltage dropped to a point so low as to not be able to rated potential.

With any tube equipment it is essential to get a cleaner for electronic parts and go through all tubes cleaning the tubes and the sockets. They used to make cleaners especially for this along with tuner contact cleaner which worked just as well like DeOxit and such. The trick is to take an old pocket knife or what have you and scrape the tube pins until they shine. It's not hard; just a few swipes and you can often cover more than one pin at a time. Spray the socket and insert, remove and reinsert the tube several times to help clean the socket. You will be much less haunted with misguided troubleshooting this way. Hope this helps!