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Rick,
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I would not mind putting effort behind a project like this. I have a perfect test chassis here in the lab as well. A fully complete 576 with no tube and a dead HV transformer. Moving to a LCD display would be fantastic possibly as well working on a digital read out. A possible modern replacement for the fiber optic readout. I have a readout board in the lab that has some of the dead custom tech IC's so it is a door stop at the moment without a good deal of effort. In my mind it would be cool to have a CRT delete HV transformer as well this could be a matched transformer to the original with the 4KV winding removed. This way we will only need to handle about 200 Vdc I am not totally sure if the 200 Vdc supply is even necessary as this might only be used around the tube. So if the CRT is removed it would be convenient if the HV supply could be totally deleted but I am not sure about that yet. I have a calibration fixture available to me in the lab so I can also test a full calibration on the test frame. 067-599-00 I am getting very interested in this one. Zen -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of garp66 Sent: Tuesday, November 2, 2021 10:35 AM To: [email protected] Subject: Re: [TekScopes] Curve Tracer CRTs hi Walter, I have been thinking about a possible replacement video display panel for the Tek 576 CRT : It would require some cpu or processor ( A/D, logic, etc.) to translate, format and communicate the Tek 576 info to the LED or LCD display. Perhaps an FPGA or other ( Arduino, or Rasp Pi with A/D shields, etc. ) ?? I am trying to look at, and understand some of the possible video processor IC's that might have some functionality that could be tapped to aid in this sort of a ' converter" but am not familiar with modern ones. Anyone have any ideas ? A] I am aware of the NEC 7220 IC, and am just starting to look at that for a possible shoe-horn type of use ( ? ) B] Epiphan has some interesting video frame grabber converters ( typically converts VGA, etc. ) that might be of use, but how to kludge them into the Tek 576 CRT signals ( ? ). .... but does not seem to have any input for an x-y O-scope type of signal set ( ? ) Perhaps some hidden function in an Epiphan VGA2USB LR or other unit ? C] It would be nice to have a table or list of all of the Tek 576 CRT signals, and their voltage ranges that are applied to the Tek 576 CRT, -- if anyone has such ? { >>> if so, can they post it in the Tek 576 file page, ... perhaps labelled CRT display specs ?? }. D] Some time ago, I had posted the finding about the eBay Seller of the USB-Tek 576 contraption: { ** below } That USB- Tek 576 post developed ~ 80 posts by the members of this group, .... and had some good tips, descent ( ! ) and other info. ** /g/TekScopes/message/162844?p=%2C%2C%2C20%2C0%2C0%2C0%3A%3ACreated%2C%2CTek+576+USB%2C20%2C1%2C0%2C69490299 Clearly, tapping into the Tek 576 and display, via USB into a laptop *might* be a good solution to failing CRT's in Tek 576 units, to extend their life. I still think this would be a valuable asset for a Tek 576, with an ailing CRT, and would provide the ability to save, massage ( via MaLab, or other math programs ) and compare Tek 576 CT data files. Must be some way to tap into the 576 CRT signals !! rick |
