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Meanwhile, in my experiments this morning: A raster display WITHOUT a Z-axis is looking "impractical". Two issues so far: 1) A 256 X 256 bitmap only updates 4 or 5 times per second. The issue is

I understand your point, but (to me) the main point is "display something **on an old analog scope**". That is, displaying a GOOD image is NOT the point of the exercise - of course there are much

Right. All the important params could be specified by the Windows app that provides the image data. One real limitation is the memory space of the MSP430FR2355. With an arbitrary monochrome bitmap,

The failed component is a 3.3 uF 160V capacitor on the F&I board. C2031.

Sounds good, Pete! If you used a raster display, would you have parameters in your code for the number of steps per X and Y lines? It seems like that would be necessary or at least nice, to handle the

Came across someone with the same problem which he located to the HV board. That could well be the case, as the 245B this A9 board came out of has no display either. It's only a small board so if the

Just a quick update.. After walking away from this 2465 and working on other scopes, following a hunch, I checked the HV board and discovered that the 120-1418-00 high voltage transformer had failed

Hi John, I couldn't find an optocoupler in the power supply schematic, and RESET on the processor board schematic led me to GPIB board. Likely that's me being clueless and looking at the wrong thing,

Hi, Thank you for your message and suggestions. As I mentioned, the acquisition board is shorted, and I have isolated the op-amps and, if I am not mistaken, some CMOS components connected to the +5V

FWIW, I'm starting to work on a version that uses an off-the-shelf MCU board, so no assembly is required other than connecting to the vertical and horizontal of a scope, and powering the board (via a

Open sourcing the design would be awesome. :) Regards Jared

Another vote for a kit version.

Leo: More than that, the very wideband CTs us distributed wdgs and terms and low perm GHz material. see the excellent Tektronic Circuits Concepts https://w140.com/tekwiki/wiki/Concepts_Series

Ed, David, thank you for the CM choke reminder. I needed this for 10MHz sinewave but it's a good idea to keep things tidy at the higher end. Leo

I have successfully made a CT-6 replacement by taking apart an ethernet transformer (Bourns SM51108), cutting off the old windings and winding 10 turns of thin wire on the toroid. This transformer

I have not read all the other responses so apologies if this is a repeat. I owned a 744 once with the same hiccup behavior. The CRT driver circuit was bad. You report that you have (had) good VGA from

I was thinking the same thing, make a kit out of it?

BW upgrade works equally well, either via GPIB or Network. Raymond

Short question: Is the BW upgrade on a TDS3034 only possible with GPIB or is ethernet also possible?

That doesn't make sense? Show the display with the calibrator as input. Set trigger to Auto.