CRT Testing and Rejuvination Tips part 1

[@butcharmstrong9645]

I saw the spark.!

[@tonyfulford3175]

The Cardinals singing in the background seem to be very happy you were able to restore the CRT back into the green. I'm pretty sure the birds aren't the only ones that are happy ! Cheers.

[@TechneMoira]

There was a spark, a small one; either way that seems to have done the trick :) I don't know why exactly, but I always found you checking out CRT's as very entertaining in a satisfying way. I tried rejuvenation on an old 8XP4 once myself, but it didn't improve the tube noticeably (nor did it degrade) so I would say "results may vary" where rejuvenations are concerned

[@Rangerman9404]

I saw and heard the spark.

[@hestheMaster]

I think YTer Jordan Pier should watch this video after seeing his latest video on an Emerson 614! Oh, boy! I commented after watching him struggle and using the wrong schematic ( he wasn't using Emerson's, available at ETF). I set him on the right course mainly cause of how I have seen you do things Bob even in a dark garage. Great video sir!

[@Tysman909]

I saw a spark glad you have that device very handy.

[@oldavguywholovesRCA]

I love my CR 70 since I repaired the filament supply issue.! Thumbs Up !

[@bandersentv]

It is definitely my favorite tester. Very versatile and the auto-restore is a fairly safe way to boost emissions.

[@peterbondmusic]

very cool that there is a little life left in the CRT

[@bigaudioal]

Bob, I cannot believe this! I just returned a 16AP4 to the museum this past weekend. They sold it to me last year (2022) as a 19AP4, and I did not realize it was a 16 until I got home. It was good too. Wish I knew, I could have handed it to you as I know exactly where it is at the museum.

[@bandersentv]

Agrh! Ah, it's OK. I thinl I have a line on a replacement and this one has a little life left.

[@bigaudioal]

@@bandersentv well if that does not work out, I know the museum has one. 👍🏻

[@SmokeyWire56]

I have an Admiral with a 16 inch metal cone that test zero on two crt testers. It glows green inside when running. Then i notice the cathode has hole burnt through it and the filiment is poking through the cathode a bit. It takes a minute but the picture is ok. Those Admiral chassis are really strong.

[@markpirateuk]

Judging by the meter on the CRT tester, it should produce a watchable picture, I have had CRT's that are in the higher part of the red on my B&K 470 give an acceptable picture, I have even seen an increase in emission after a few hours of use. If nothing else, the CRT should be good enough for testing the set. Sometimes just letting the CRT cook at a higher heater voltage can wake up the emission.

[@chriscimino7854]

I didn't have a rejuvenator when I worked on an old Philco 17" b&w but I had a High voltage high frequency supply that could jump an arc 1" that looked like a high voltage probe and it was specifically designed for CCFL testing on LCD TVs so I disconnected the wire going to the G1 and powered the TV on and touched the G1 on the tube with the high voltage low current probe and it worked. Had a nice bright picture afterwards and is safe for the tube because the probe is only about 20ma. Then reconnect the G1 wire and looked good. I think it's the green wire. I remember when I took Radio TV repair at Vo Tech we had a more modern crt tester rejuvenator that worked most of the time but was gentle then we had an older tester and it was brutal 😆 you could hear it hum when you hit the button. We used that one on stubborn crt😆 it was bad anyway but sometimes would actually work. This Philco had absolutely no illumination at all before I did this much like yours. Get a high voltage supply probe for CCFL testing and use that you'll love it I guarantee. If it can be saved it will save it if not it won't hurt it but first the TV must be working properly with good high voltage and good accelerator grid voltage. I found out that it's safer for the tube to knock off the poison with high voltage low current than risk burning out the filament with excessive heater voltage and I'm glad you got this one to come up. You could probably make your own high voltage low current supply from an ignition coil or fbt or try putting about a 470k resistor from the 500volt accelerator to G1 with G1 wire disconnect and have a mirror to see the picture just make darn sure the horizontal and vertical deflection circuits are working or you might burn the phosphorus

[@Captain_Char]

saw a brief small spark I had to back the video up cause I thought it was my cursor showing up, lol

[@hankry2798]

It would be interesting to monitor picture quality post rejuvenation to see how it lasts over time

[@bandersentv]

Agreed. I hope to have time in the fall to work on it.

[@69Dartman]

I always used a Belton when I finally was able to get one after seeing my TV geek buddy use one and bring dead tubes back with it. I have two now, the original beat one I was given and a rebuilt and updated one that has all the adapters and updated instructions. You can certainly kill a tube with one but you get a feel for how it works and be gentle with it. I usually use the clean function most times, the full zap was when you think it might be able to take it and if it doesn't your done. Sony crts almost never did well, but Zenith tubes usually were more forgiving and would come back a long time with luck. I just don't want to chuck them but I only have one crt set left and it doesn't need anything. Lotsa fun and sounds like that thing in some ways but I have killed them before 🤬😱

[@bandersentv]

Funny the Beltron have such a following. Ever look inside one? There's nothing there. Just meters and light bulbs. I'm not saying they don't work but it's a really simple device

[@69Dartman]

@@bandersentvYes, I've looked inside, I had to rewire some of the things on the upgraded one I found in the mid 2000s on eBay. I used the old one to figure out what was wrong with the newer one and fixed it. It basically just pops the guns really hard with the big cap and the cleaning function is different but it works and is completely hands on. I have saved many TVs that would have been parts sets without them and my buddy helped me understand how to use it effectively and not kill too many crts with it. The big fancy Sencore 7000 or whatever it is would be nice but stupid expensive and nobody wants crt sets anymore so just not worth it now unless I was restoring them like you are. A TV repair shop gave me my first Beltron because they got a new one and I was taking all the sets their customers didn't want to fix. Shango has a bunch of different ones, sometimes he uses one similar to yours, sometimes he uses the Beltron. Maybe he has that big everything one too but I haven't seen him dig it out. I think we use whatever we are familiar with and just stick with it if it works for us😎 The best part is they used to be cheap and just worked most of the time.

[@vk4uh96]

I saw the flash