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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.

Yup, a balun (CM choke) could be in the rather long section of the mechanical mounting structure between the small core and the cable connection. It would help with CMRR.

Joe, the board seems very simple to build. If the processor was programmed is there any reason we can't assemble it? Pretty sure we have the skills and tools to succeed! And it seems it would take a

Followed the SM instructions for 'No Display' but haven't made any real progress, other than getting a dot to appear on the screen (as opposed to merely glowing off-screen) by adjusting the R587

So the flicker only shows up at slower sweep speeds it goes away as I slow the time base down.

Hi all, In addition to the obvious current transformer, there’s likely to be a balun, to make the probe less sensitive to electric (capacitive) coupling. Thats’ probably in the longer tail, away

Check the CPU's reset line. It's driven by an optocoupler on the power supply board, as I recall, and the resistor that drives the LED side of the optocoupler can open up. -- john KE5FX

Hello everyone, First of all, I apologize for being absent from the forum for so long. Some time ago, I ordered the capacitors and have already replaced them. However, I made a mistake: instead of

If you go to our website and search for demo board, you find the description. eBay listings disappear when sold out. https://vintagetek.org/vintagetek-demo-board/ Dave