Quote:
Originally Posted by SkyLlama
And then how do I go about testing a CRT? I've never done it before and don't want to potentially damage anything.
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First, replace both capacitors with 600 V new parts.
Second, check the resitors for correct value. These testers are often found with resistors that have been given a hot foot by a shorted tube.
Only if the switches seem to be poorly making contact, clean the switch with a traditional (non-Oxy type) cleaner.
Have someone with a tube tester test the one tube in this tester.
Read the manual.
Ask if the owner still has his, if not down load my CRT 400 which is in the 6th post in this thread:
http://videokarma.org/showthread.php?t=254627
Standardize your testing procedure. Turn on the tester and let the filament warm up 5 minutes. Then do the shorts test while gently thumping the CRT neck at two points 90 degrees apart. Then do the emission test.
Never,
not never nohow, ever do a rejuvination test with this tester, unless the tube shows a short. Even then, try to find a tester with a better shorts burn circuit.
If the tube is just low in emission, let the filament burn 24 hours at its rated voltage and retest. This helps to wake up tubes that have not been used in many years. Same thing if the tube looks gassy.
James