Monitor Rejuvenator?

solo742

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What does this do? Will it cure (moderate) burn in? Not sure if this would be a good investment or not.

Thanks for any information.
 
Rejuvenators are designed to test and check the CRT and fix it if the picture tubes have problems (shorts, etc) and can bring the electron guns back to life.

It will do nothing for screen burn. Screen burn is permanent.
 
a rejuvenator is a good investment if you have a sizable collection and you enjoy doing a lot of the work yourself, especially monitor repair. it can take what was essentially a dead tube and give it years of additional life, but not in every case.

my rejuvenator cost me $40 shipped and i've already saved two tubes from the scrapheap, with several more in line. i've also had one that has totally failed all attempts to revive it, but i feel a lot more comfortable dumping it now that i know it's toast.
 
I've been checking my tubes when I have the backs of games off they have all had good emission except for one tube that is a spare sitting in the garage the blue gun read bad so cleaned it colors look great now. Best 75 bucks I ever spent.


Andrew
 
I would like to state for the record that if you have weak guns, you should try cleaning them first before jumping to the full rejuvenate setting. (B&K rejuvenator)

I think I just toasted the green gun on a "good" G07 tube the other night. Couldn't find anyone to kick me in the nuts for doing that so I'll just berate myself here. I did have a tube from another monitor with a high-impedance yoke that I just swapped in. Worked like a champ.

So Clean first, if no improvement, then rejuvenate. For those of you that don't know what I am talking about, it is basically a gentler, lower power setting to clean the guns than a full blast high heat cooking. An oversimplification but adequate for our purposes.
 
yeah, my Heathkit 5230 has the instructions in the lid and it says to do a clean first and then if that doesn't do it try a rejuvenate.

and it's possible to destroy a working tube with a rejuvenation (i've seen the figure approximately 1 in 10 thrown around,) so make sure you try chassis adjustments and repair before resorting to rejuve.
 
$40??

a rejuvenator is a good investment if you have a sizable collection and you enjoy doing a lot of the work yourself, especially monitor repair. it can take what was essentially a dead tube and give it years of additional life, but not in every case.

my rejuvenator cost me $40 shipped and i've already saved two tubes from the scrapheap, with several more in line. i've also had one that has totally failed all attempts to revive it, but i feel a lot more comfortable dumping it now that i know it's toast.

I am looking on the internetz and all I see for rejuicenators are $1500! $40???


http://www.mcmelectronics.com/product/B-K-PRECISION-490B-/73-015
 
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That price is for a new unit. Most people buy a used rejuvenator off of eBay. The 467, 470, 480, and 490 are the rejuvenators most people pick up for under $50.
 
I would like to state for the record that if you have weak guns, you should try cleaning them first before jumping to the full rejuvenate setting. (B&K rejuvenator)

I think I just toasted the green gun on a "good" G07 tube the other night. Couldn't find anyone to kick me in the nuts for doing that so I'll just berate myself here. I did have a tube from another monitor with a high-impedance yoke that I just swapped in. Worked like a champ.

So Clean first, if no improvement, then rejuvenate. For those of you that don't know what I am talking about, it is basically a gentler, lower power setting to clean the guns than a full blast high heat cooking. An oversimplification but adequate for our purposes.

Unless you have the heater or cutoffs set wrong, this shouldn't happen much. Did you try rejuvenating it again? Sometimes I have a color missing or stuck on after a rejuv (that wasn't like that before) even though the readings look okay. I do it again and get the color back, but another color might be missing. After 3 or 4 tries I have everything back where it should be. If your color guns are giving a reading in the green, then they can most likely be brought back. if they are showing nothing, or the direct-to-heater-short light is on, then it might be gone permanently.

I have rejuved hundred of tubes with my BK490, and have never lost a tube that was mostly good before I started. Remember, we are normally doing this on monitors that already have issues. If it looked good initially, we wouldn't try the rejuv...
 
Is it worth trying to rejuvenate a monitor that takes about 60 seconds to warm up. I see vertical white lines (on a vertical mount monitor) for the first minute or so and my blacks are kind of grey, but as the monitor warms up the blacks darken and as that happens the lines go away. Picture is beautiful after that.

My instinct is to leave it, but I've read elsewhere the monitor should not take that long to warm up.
 
Is it worth trying to rejuvenate a monitor that takes about 60 seconds to warm up. I see vertical white lines (on a vertical mount monitor) for the first minute or so and my blacks are kind of grey, but as the monitor warms up the blacks darken and as that happens the lines go away. Picture is beautiful after that.

My instinct is to leave it, but I've read elsewhere the monitor should not take that long to warm up.

Sixty seconds isn't terrible at all. It also may not be a tube issue. What monitor is is? What's the B+ voltage? When was it last capped?
 
Sixty seconds isn't terrible at all. It also may not be a tube issue. What monitor is is? What's the B+ voltage? When was it last capped?

Unfortunately, I don't have a meter to check the B+ voltage. But it's a 20EZ. The monitor was just recapped this year.
 
The vertical lines are from the screen voltage being up a tad too high - but if they go away after a minute I wouldn't worry about it. If it bothers you, just turn it down a nudge.
 
The vertical lines are from the screen voltage being up a tad too high - but if they go away after a minute I wouldn't worry about it. If it bothers you, just turn it down a nudge.

Ahh, interesting. Thanks.
 
The vertical lines are from the screen voltage being up a tad too high - but if they go away after a minute I wouldn't worry about it. If it bothers you, just turn it down a nudge.

Like these horizontal ones in horizontal orientation?

2010-05-22-time-23-59-59-day-6.jpg


Ignore the dimness, I figured out that the previous owner messed with the RGB drives and cutoffs.
 
That tube looks like it could use some help from a rejuvenator. Remove the shorts and clean/balance the guns and it should look great.

Actually, that photo is from 2 days ago, last night I cleaned the tube, pulled the neckboard and blew it out, and adjusted the RGB Drive and cutoff and it looks alot better. I would say the red is still a little weak. I am ordering a cap kit from Bob first.
 
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