[drh4683]

I agree with james. The b+k 667 is an excellent tester for TV use. I have used one, but dont own one. I have a sencore mightymite VII which is from the mid 70's so it has all the odd ball compactrons in the listings. It is essential that your tube tester have the capability of testing for grid emission (or sometimes called "grid leakage") Most tubes in TV's will test OK on emission but will fail grid emission tests, IF and signal amp tubes in particular are prone to grid emission failure. Also, LIFE TEST function is very helpful as this shows the quality of emission if the filament voltage is dropped. Most newer testers have those capabilitys. I like james like to test EVERY tube in a set before I go any further in diagnosis, as you can rule out the tube thing as a potential problem. Even if a set works just fine, I like to test every tube, as some tubes indicate shorts or other problems that dont effect the set, but will over time if not corrected.