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I know this is a long shot, but doesn't hurt to ask. I want a P11 phosphor tube for my 570/575. I know the pitfalls of them vs regular green P1/P2/P31 phosphor for day to day use, but I still want one.
Can trade a working P1 tube from my 575 if you wanted a green one in exchange (slight burn in, at the bottom lower left corner where the dot must have remained idle for some time). Located in Rochester, NY. |
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First look up the 570/575 manuals and catalog info and see if P11 was ever even an option for these. I think all the curve tracers used low speed CRTs, so it's possible there was never such a thing in P11 (usually for high writing rate photography) for these. There still could be a match if you thoroughly investigate the various Tek CRT history, families, and uses. Start at tekwiki and see if you can find what CRT part numbers were used, and from there you can sometimes see what other models could have had the same basic tube, maybe including a P11. Also search by the original "T" (like T4XXX) numbers which are the most basic forms of the CRTs - a lot of 154- part numbers have evolved from relatively few T CRTs. After you look around enough and cross reference things, you get used to it. At first it is very confusing. Good luck.
For example, I found long ago and recently confirmed that the 577 (non-storage) model CT uses the same exact CRT as some 5000 series scopes - the 5110 AKA 5103N in this case, because I had a junker one. The carcass ran sufficiently to check the CRT which was in great shape, so it is now a spare for the 577. I have others of these too, but none so thoroughly tested for condition. Ed |
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Yea I've spent quite a bit of time researching it at TekWiki and other places over the past year. They definitely exist - I've seen at least two, and were documented in the manuals. You could get them in P7 as well, though I've never seen one of those. Here's a link to a vid of one in operation with P11:
The 575 page on TekWiki even has a link to a document to replace the tube with the P11 phosphor - looks like they have you change a 100K pot to a 250k: I believe the only other tube that can be made to work in a 575 is the 535A CRT (T64P/T533/T5330) - but it's not a perfect swap and requires a modification. It looks like some people aren't happy with it only having 8cm vertical deflection as well: /g/TekScopes/topic/535a_crt_in_a_575_clever/33170927 I've been keeping an eye out for those, too. |
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You are going to have an extremely hard time finding a P11 T52 CRT.
I bought three 532’s from eBay recently, and they all have P2 CRT’s, which now reside in three of my 575’s. Only one 532 was in restorable shape, so it now has one of the P31 CRT’s. The only source of extra CRT’s for the 570/575 are going to be 532’s, and those are hard to find. You’ll have to use a P11 535 CRT and modify it, unless you get extremely lucky and find a 532 with P11. |
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I don't disagree that it will be difficult but so far I've got a pretty high success rate from posting want ads on other rare items (I found a guy with 4 570 curve tracers, bought one, managed to get my hands on two Hewlett Packard Barney Oliver amplifiers, etc). So worth a shot.
I would be willing to buy an entire 570 / 575 with the tube if needed. I have an early S/N 570 with the one piece case, so would be willing to pay a decent amount for a later S/N 570 if it has the P11 phosphor tube and is within 12 hours drive of Rochester, NY |
Eric Boyle