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  #1  
Old 02-17-2017, 04:49 PM
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I'm getting a Sencore CR70

I'll be paying $100 to a close TV friend for his complete, and very clean Sencore CR70 tomorrow. I've been researching the CR70, and I know it's a pre 1987 model, because it has the number 8 roundie socket, and it also has the universal adapter. I watched several videos about the CR70, and I think it will probably take the place of my B&K 470, that is if I like it. Coming from a B&K background, I'm sure it will take some getting used to. Is there anything I should know before I start fooling with it?
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Old 02-17-2017, 06:35 PM
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It was a bit of a learning curve for me, but I had never used a CRT tester before. I recall that I forgot to set cutoff before testing emissions; no harm done, but an incorrect reading of course. I don't know what Manual Restore 2 does and I wouldn't try it right now. Apparently it's only explained in the user's manual and is only to be used if rejuvenation fails, so I reckon it's pretty powerful.

Pre-1987, are you sure? Mine came with the 1989 setup book and has the number 8 socket, not to mention the discs at the base of some of the knobs, which I have since removed because they obstructed my view of the numbers. I have an earlier parts unit as well, it powers up but it seems there's no current getting to the CRT. It came with an early edition of the setup book and no roundie socket.

Every rectangular delta tube I've tested uses socket 2 and the same settings. I'm pretty sure I've memorized them correctly.
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Old 02-17-2017, 07:39 PM
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To this day, I have not been in the presence of a CR70, so I don't really know what to expect. I have not even seen a picture of this one. The guy I'm getting from is very trustworthy, and I have no problem believing what he says about it is true. I'll add pictures tomorrow. I'll be at the SARS swap meet tomorrow, with pictures of that too.
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Old 02-17-2017, 08:41 PM
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No kidding? It does seem to be the gold standard among us. There is the CR7000 that has a lot more bells and whistles, but as James Doohan once said "The more they overthink the plumbing the easier it is to stop up the drain".
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Old 02-17-2017, 09:11 PM
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I've seen a friend's CR-70 revive a stone dead 16GP4 to weak, but usable...The CR-70 is on my to get list...
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Old 02-20-2017, 10:03 AM
dieseljeep dieseljeep is offline
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Quote:
Originally Posted by Electronic M View Post
I've seen a friend's CR-70 revive a stone dead 16GP4 to weak, but usable...The CR-70 is on my to get list...
Seems like a little peer-pressure.
Reminds me of the Eddie Murphy routine about the ice cream cone.
" I have a CR70 and you don't".
I bought one a while back, because I was starting to feel inferior to the rest of the group here.
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Old 02-20-2017, 10:28 AM
WISCOJIM WISCOJIM is offline
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Quote:
Originally Posted by dieseljeep View Post
Seems like a little peer-pressure.
Reminds me of the Eddie Murphy routine about the ice cream cone.
" I have a CR70 and you don't".
I bought one a while back, because I was starting to feel inferior to the rest of the group here.
Now you need to get the Sencore CR7000 to keep up with some of us!

Actually I'm not a fan of the Sencore CR70 for testing color CRTs. For testing color tubes I prefer the testers that have separate meters for each gun as they give you a better indication of comparable warm-up speed, weak guns, maximum emissions readings, life test inconsistencies, etc. Therefore I'd rather test with a B&K 467 or 490, RCA WT-333A, Heathkit IT-5230, the REM, Beltron testers, etc. There is probably no quicker tester to use on old roundie color CRTs than the Beltron units.

And even though I do have the CR7000, I prefer to watch a metered display rather than the often undefinable rows of LEDs, so it rarely gets used.

.

Last edited by WISCOJIM; 02-20-2017 at 10:32 AM.
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Old 02-20-2017, 11:31 AM
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Quote:
Originally Posted by WISCOJIM View Post
Now you need to get the Sencore CR7000 to keep up with some of us!

And even though I do have the CR7000, I prefer to watch a metered display rather than the often undefinable rows of LEDs, so it rarely gets used.

.
Is the CR7000 for sael?
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Old 02-20-2017, 06:10 PM
WISCOJIM WISCOJIM is offline
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Quote:
Originally Posted by TUD1 View Post
Is the CR7000 for sael?
No, it's not. And if it was it would be more than $500.

http://www.ebay.com/sch/i.html?_from...p2045573.m1684

.
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Old 02-20-2017, 11:00 AM
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Quote:
Originally Posted by dieseljeep View Post
Seems like a little peer-pressure.
Reminds me of the Eddie Murphy routine about the ice cream cone.
" I have a CR70 and you don't".
I bought one a while back, because I was starting to feel inferior to the rest of the group here.
The CR-70 has been on my list for a while (that demonstration I mentioned was...Hmm...6-7 years ago ). Was always too broke/cheap for one, and my B&K 466 has proved to be an accurate, comfortable and user friendly rig....Heck on all ,but CRTs with odd focus/G1/heater voltages, screw the set up manual, all you need is the right adapter and the knobs practically set themselves....If I had a monkey, a bunch of different testers, and a room full of CRTs that needed testing I'd give the monkey my B&K and tell him to have fun.
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Old 04-01-2017, 09:54 AM
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dtvmcdonald dtvmcdonald is offline
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I have one in the mail. A separate order of eleven unused sockets, the universal
clipon, and manual arrived yesterday. Most sockets look overly modern. There
are duplicates so I would be amenable to giving a couple away at the ETF
convention. The manual is not quite "Conceptual Framework of Quantum
Field Theory", which is my bedtime reading these days, but its the sort of thing
you really do have do study all the way through.

One thing bothers me about "rebuilding" color tubes: the filaments are all
in parallel, so if it overheats one it overheats all. I would have no reticence
trying it on my 15GP22's red gun alone, but I worry about hurting the two good guns.
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  #12  
Old 04-01-2017, 07:41 PM
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Quote:
Originally Posted by dtvmcdonald View Post
One thing bothers me about "rebuilding" color tubes: the filaments are all
in parallel, so if it overheats one it overheats all. I would have no reticence
trying it on my 15GP22's red gun alone, but I worry about hurting the two good guns.
I don't know if this would help, but the green gun in my Electrohome had drifted slightly out of balance with the others so I gave it a gentle jolt and brought it back up to snuff. It's been a couple of days and it still looks good. The picture had a slight yellowish tinge when I first started it but that quickly vanished.
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  #13  
Old 02-18-2017, 04:23 PM
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I got the CR70, (among lots of other things) and it's definitely not minty fresh like I thought. I did not get a manual, only a setup book. If somebody would send me a setup book, that would be fantabulous. I tested it on a 25XP22, and it does work, but it takes some getting used to.
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Old 02-19-2017, 01:27 AM
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I have a nice looking CR70 that I'd consider selling. To me they seem overly complex for the intended purpose, and if you ever look inside one you'll see why. From what I hear the Beltron does an equal if not better job on restore, and with a very minimal amount of circuitry.
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Old 02-19-2017, 02:32 PM
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Quote:
Originally Posted by Kevin Kuehn View Post
I have a nice looking CR70 that I'd consider selling. To me they seem overly complex for the intended purpose, and if you ever look inside one you'll see why. From what I hear the Beltron does an equal if not better job on restore, and with a very minimal amount of circuitry.
How much is it? I'm just about to use this one as a parts set. The instrument itself isn't too bad, but the plastic case is horribly beat up.
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