How good of a picture can one expect on a ctc-44a???

[joeseattle70]

Many thanks to those of you who helped me with great advice to get my sound issue resolved on my CTC-44A chassis RCA console tv from 1970. Question now is, how good of a picture can be expected on a set of this era? Obviously I won't be getting plasma tv clarity - but it has the original tube (has had daily use the first 10 years of it's life, then rarely used since). The adjustments on the back of the set have been cranked up (brightness) to give more adjustment on the front adjustment knob for brightness. Does not need a brightner per the tech that looked at it - he said it had some miles on the tube - maybe some vacuum loss - he also backed down the green color as it was too strong - said tube wasn't defective or shot - but rather it was showing some wear. Colors tend to not be too accurate - for example dark dark blues can almost look blackish, etc. Not sure with how tv signals are these days if a new tube would help it, or if i am not going to get much out of a new tube that is better. Also not sure if I should have it tinkered with due to age - but also fear that another tube will be hard to find down the road should it totally crap out. Tech also said nothing could be done with the aspect ratio - some of the footers on CNN can get somewhat cut off - he said cable tv and today's signals were the culprit. Adjusted it some, but had to back off as it started to shrink the top of the picture on the set. Any advice as to how often it should be used to help keep it operational, or does it matter? Many thanks!