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B+K 467 erroneous readings
In case anybody hadn't noticed, I'm hell bent on getting a working example of every CRT tester ever made. I bought this B+K Precision 467 at the swap meet this weekend seconds before buying my Sencore CR70. The guy promised me it worked (sure thing) and of course it doesn't. I've tested it on three CRT's now, and it measured them all as being weak, even though my CR70 and B+K 470 both say they test good. The 467 also started buzzing today when I used it to get the pictures. I'll probably try a calibration on it, but there is something wrong that makes the meters read low on emission test. Has anybody else had these kind of problems with 467's?
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan |
#2
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/me shrugs
Why not open it and look inside? |
#3
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Opened it up, and found about a dozen cold solders. Not as much as I've seen in another 467 on YouTube. Theirs had almost all its joints cracked. I tried to reflow them with my soldering gun, but it was way too big. I'll have to get a pencil tip and reflow them. The tube inside also tested marginal.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan |
#4
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I have two of these BK 467s, one from a shop closing and another from a swap meet. One has a dead filament supply and the other has G1 supply failure. both seem to have loads of cold solder joints.
Im just not very motivated to spend as much time on this as on a whole color TV, though there are enough different sockets there is probably not a set I have this would not be able to test.
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"When resistors increase in value, they're worthless" -Dave G |
#5
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It seems that 467's are highly flaky and unreliable. I have two, and my other one doesn't even work. The cutoffs are way messed up on it.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan |
Audiokarma |
#6
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I used a 467 for years, and it was highly dependable. The only time I ever cracked open the case was to repair a cold solder joint, and cleaned all the switches (while I had it apart). If that 467 wasn't on the bench, it was tossing around in the back of the van on service calls. Other than the cheap, plastic latch on the case, it was a great machine. I wish I had it back!
I had a competitor who used to swing by my shop to get me to rejuvenate CRT's for him that his Sencore machine wouldn't do. |
#7
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Quote:
In my experience with test gear, taking a gamble on something that "powers on but is otherwise untested" usually pays off and is a very good bargain. It doesn't surprise me that the guy you got the B&K from was blowing smoke. No negative feedback from a swap meet. |
#8
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Quote:
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Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
#9
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Quote:
I always liked the fact the 467 had three separate meters. It was nice to be able to see all three guns simultaneously. |
#10
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Since Tud1 wants to collect c.r.t. testers, I figured I would post this here. I have a Sencore CR143 tester that I purchased. I then realized that you must have the manual to operate it once I found that the instructions inside the cover were only basic and referenced the manual, so I had to buy the manual. In testing it, I found that it would not zero for some reason and without that, no test result is going to be accurate. It does power filaments or did on a couple of old sets I have, and it does give a reading which says that the meter is good.
I popped it open one day concerned with the zero function and found that a large electrolytic capacitor was warm. I opened a leg and it’s leaky as can be on a load tester. That’s not the zero problem though. At any rate, if anyone wants the thing I will let it go cheap. It is in nice condition with all cables needed to test most any c.r.t. (up to a certain generation I assume). Just PM if interested. |
Audiokarma |
#11
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Over the last 3 years, I have a B&K 445 that gives me the best read on any older CRT, I disconnected the "dynamic intensifier button" as it scares the hell out of me just thinking of actually pushing it. "Remove shorts" is a scary feature too For the previous 40 years, my Heathkit IT-5320, that works on a Beltron-style circuit. It can hit a CRT hard on rejuvenate if it needs to but Ive never trashed a cathode either
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"When resistors increase in value, they're worthless" -Dave G |
#12
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As a point of reference, my 467 matches the readings I get on my CR70 when the CRT type is set to "video".
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Tim |
#13
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I reflowed a whole bunch of solder joints on this thing, and I think I solved the problem. The meters read way different than they did in that picture, but they still kind of "shiver." I tested it on a crappy CRT (the one in the 1965 Zenith with 6 million hours) and it reads that CRT as being stronger than the one I tested for the other picture. Which I know is way stronger.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan |
#14
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Re: shivering meters.....
I powered up my 467 last night to check a 5" TV test CRT. Dancing needles - all three meters. They seem to pulse at a fixed interval. I'll open it up this week - too much spring cleaning going on to do any tron stuff right now.
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Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
#15
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When I first test some color CRTs with a Heathkit IT-5320, the needles on all three meters waver back and forth at 1-2 sec intervals as it warms up, especially a sleepy tube. After a few minutes they stop.
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"When resistors increase in value, they're worthless" -Dave G |
Audiokarma |
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