Renegade Posted January 16 Report Share Posted January 16 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 ! Quote Link to post Share on other sites
Verault Posted January 16 Report Share Posted January 16 (edited) I have installed clinton CRT's into monocrhome apple II monitors so cant tell without all the info hidden under the foam. Ask the seller to take more photos. Edited January 16 by Verault Quote Link to post Share on other sites
SuperSVGA Posted January 16 Report Share Posted January 16 Looks very similar to a Macintosh Classic yoke based on design and part number. Most of the Lisa CRTs I see online don't look like this. Quote Link to post Share on other sites
cheesestraws Posted January 16 Report Share Posted January 16 How big are they? Looking up that part number on the Internet seems to suggest they're 7" CRTs, which would make them too small for a Lisa, but that's ... not an entirely reliable signal, let's face it. Quote Link to post Share on other sites
SuperSVGA Posted January 16 Report Share Posted January 16 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. Quote Link to post Share on other sites
trag Posted January 17 Report Share Posted January 17 I don't know if it helps at all, but the Apple part number for the LISA CRT was 076-0105 1 CRT & Yoke Assembly (Lisa) And the part number for the flyback was: 076-0106 Quote Link to post Share on other sites
Renegade Posted January 17 Author Report Share Posted January 17 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: Then the Molex pluf is different: Quote Link to post Share on other sites
Verault Posted January 17 Report Share Posted January 17 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 Quote Link to post Share on other sites
SuperSVGA Posted January 17 Report Share Posted January 17 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. Quote Link to post Share on other sites
macdoogie Posted January 17 Report Share Posted January 17 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. Quote Link to post Share on other sites
Verault Posted January 18 Report Share Posted January 18 (edited) 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. Edited January 18 by Verault Quote Link to post Share on other sites
Renegade Posted January 19 Author Report Share Posted January 19 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. Quote Link to post Share on other sites
compu_85 Posted February 1 Report Share Posted February 1 If they're 12, they're likely Lisa CRTs. Hold a bright flashlight up to the screen. Is there a green after-glow? -J Quote Link to post Share on other sites
stepleton Posted February 1 Report Share Posted February 1 I know you know your phosphors , 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! Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.