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Tektronix TDS744 CRT to LCD color converter FPGA module DIY

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Tantratron:

--- Quote from: TerrySt on December 07, 2023, 08:20:49 pm ---I'm happy to share the design files.  I'll post the KiCad schematic and pcb files here once I check out the latest board spin.  But the pcb files might not be of use to anyone unless they also have a TDS524A since the way I made the pcb it mechanically fits the mounting points on scope and lines up with the RAMDAC chip.  I doubt any other models would share the same dimensions.

--- End quote ---

I never had older TDSxxx versions except one TDS510A, other 8 models I've reconditionned were C or D serie. The TDS510A even 68020 engine based instead of later 68040 for A11 board do use the same layout for video section than any C or D serie, probably same for TDS7x4A. However I've found one picture of your TDS524A board from internet (see attached with YELLOW arrow) where now I see the mechanical problem or say the U199 chip (RAMDAC) being quite close from fan unit whereas later models position U199 much further away mechanically.

Saying this, I really doubt from a firmware or electrical video signal (analog, digital) any difference, tektronix kept for all versions the same video concept wether mono-CRT or color-CRT hence your work is very valuable for TDSxxx community.

TERRA Operative:
I just ordered a couple LCD panels for my TDS784D and TDS794D, another fun project to add to the list. :)

Once they arrive, I'll have a go at designing a bezel/mount. Maybe sheet metal, maybe 3D printable?
Sheet metal has more strength and 'permanence', 3D printable is easier for anyone to make.

Or, "Why not both?" Choice is good. Let's see what way will work best when the panels arrive.

Tantratron:

--- Quote from: TERRA Operative on December 08, 2023, 06:59:05 pm ---I just ordered a couple LCD panels for my TDS784D and TDS794D, another fun project to add to the list. :)

--- End quote ---
Where did you order them ?
Are there new or used ?

TERRA Operative:
I just grabbed these ones.
https://www.ebay.com/itm/314600953560
Not sure if they are new, but the images suggest so (for little that it's worth).

I'll know if they are any good when they arrive....

TerrySt:
The new board works.  Here are PDFs of the schematics.  There are two boards.  The main board and a board that has just the socket for the RAMDAC.  This is so the height of the main board can be set to allow the mechanical mounting points in the o'scope to be used.

Terry

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