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Could these be Lisa CRTs ?


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Hi,


Currently in the process of moving my whole collection, I stumbled upon 3 of these new-old-stock CRTs.
As you can see, the sticker reads "YK1208 - E37984 Type 90912" by Clinton Electronics Group.

 

Thanks to anyone who can confirm !

IMG_20210113_152221.jpg

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The Lisa's display was 12" diagonal, so if you've worked with compact Mac CRTs you would probably notice a major difference in size.

 

I've attached some pictures of Lisa CRTs I found online, it's possible the design differed between CRT models but they don't look much like the one in your image.

Screen Shot 2021-01-16 at 4.38.57 PM.png

Screen Shot 2021-01-16 at 4.39.11 PM.png

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Hi guys, thank you for your replies.

 

17 hours ago, SuperSVGA said:

The Lisa's display was 12" diagonal, so if you've worked with compact Mac CRTs you would probably notice a major difference in size.

 

 

Indeed, the CRTs I have are definitely 12".

But it seems they are quite different from the photo you posted, as the yoke differs and the anode hole is on the side:

IMG_20210117_153514.thumb.jpg.fc5a9758ba5ed5ce2039e22f1ba4670b.jpg

 

Then the Molex pluf is different:

 

IMG_20210117_153519.thumb.jpg.e7b1b3f762073c71f2823f551b0605fe.jpg

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What we are seeing on the posters image may just be the part numbers for the Yoke assembly. We need to see the tube markings. If you have a Lisa yoke you can more than likely swap it to the tube. I have done this on various 12" CRT's

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That connector looks very similar to one of the variations of the Classic 4 wire yoke connector, but the wire colors are different.

 

If these were Apple intended tubes at all, it's possible they were for one of the 12" Macintosh CRTs, but I don't have much to compare with on those. Definitely looks too new to be the Monitor /// tube at least.

 

I suppose one thing you could look at is whether the cathode end has the usual 7 pin base.

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If it were a Monitor III it would have the anti-glare "fabric" on the front. If it were a IIe monitor, you'd still see a greenish tint even when powered off. The connector and Yoke look more modern than the Lisa by a few years. I'd say if they are from Apple products at all, it would be one of the monochrome 12" white phosphor models like the platinum cased Apple II composite monitor or the 12" Hi-Resolution Monochrome monitor for the Mac.

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That fabric on the monitor /// wasn't built onto the CRT, IT was integrated into a plastic frame that literally rests between the CRT and the front case. You can swap a monitor II CRT into a monitor /// chassis if you swap the yoke. see photo on the fabric insert.

20210118_101649.jpg

Edited by Verault
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Ok, so it's very likely these were for 12" Mac Monochrome CRT replacement.

 

Thank you guys.


I got these 20 years ago with a major haul of genuine Apple parts, these were the only one not packaged in an Apple branded enclosure.

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  • 2 weeks later...

I know you know your phosphors :lisa2:, but weirdly, my Lisa 1's CRT seems to have P4 phosphor (for those reading: no green after-glow) and my 2/10's CRT has the P7 type (yes after-glow). I don't know if either was a replacement tube at some point in the computers' lives, but it's funny that there's a difference.

 

Still, I've never seen a Mac with P7 phosphor, so no matter what, if the OP sees yellow, then something's probably up!

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