Thank you Hakan! This kind of good information is very rare to see, and hopefully it will help the current 2235 problem being worked on. This information will help many folks in the future! tom

Many thanks for the helpful replies folks. I just removed R919 and it measured as almost exactly 10K. I don't have any 9.1K or 11K resistors so a put back in a 10K paralleled with a 1M making

I just saw that. OCR program error, sorry. Should be T906. /Håkan

T906 / T905? Is that a typo? Barry - N4BUQ

This was a known problem at the time. See these articles from the internal Service Info from 85 and 87: // RE: Mod #54681 Implemented in Manufacturing: 2213A B016090 22I5A B013550

Are you sure that the HVO is not running at too low frequency? It should be running well above the human hearing range. I would expect it to be about 60Khz. I would think that you could read the

T906 is the usual cause of squeal from the power supply. Later versions had the center hole filled with a white goop. I seem to remember a discussion on here about how to do it/ what to use. I had

Time for another update: My replacement T906 arrived from Canada this morning. Annoyingly I had to pay the post office £15 for import duty and handling making the final cost for the part about

I had a quick look at that same 'scope at the show yesterday - very, very nice but on price I got the impression it is one of those "If you have to ask you can't afford it" bits of kit! I'll almost

Hi all, Been trying to continue fixing this wonderful scope (it has a problem with the time base B triggering system), and it is developing some further problems, it is and old grandpa this

From the markings on the belt and measurements you can determine the type of belt. McMaster-Carr (www.mcmaster.com) has a good stock of belts, as well as a very good catalog with lots of belt

Did you look around for info on the plotter to see if it can be found? Also, maybe the belt has some ID markings. Or, maybe the pulleys are marked. These sorts of things are somewhat standardized, so

You could give these people a try http://www.sdp-si.com/products/Timing-Belts-and-Cables/index.php also McMaster-Carr has a small selection of belts both these firms do small orders with credit

I will look into that tomorrow, thank you Barry.

Have you checked the low-voltage power supply values? There are a few test points that are labeled with their appropriate values located near F558. Thanks, Barry - N4BUQ

Fabio, when you wrote: "Wow! That's fast! I wonder what's the input capacitance of this 33GHz beast." I assume you were talking about the scope. Ideally, there is no input capacitance - just 50

I'll almost certainly be in my box before that 33GHz real-time beast becomes affordable! Craig

I wonder how long we will wait until these show up on ebay :).

No Barry. Nothing lights except the screen graticule illumination.

The little pen plotter that I sometimes use with my 2230 and 2232 scopes has a cog belt that has rotted. Several chunks have just come off. This is a new one for me. Any ideas on what I can do to