Conserving our good CRT's

[old_tv_nut]

Originally Posted by earlyfilm

My theory is the constant CRT heat enabled the getter to do its job better.

My understanding is that the getter does nothing after its first firing. I think what you were seeing is the cathodes being kept cleaner. In the early Saticon tube HDTV cameras, we were advised to run the camera for a few hours at least once every 6 months to counter the effects of residual gas in the tubes. Whatever reaction was happening I believe was at the cathodes themselves.