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I thought a 2235 was a 2236 without the CTM board and display? Are you sure you have a 2235?

Tan Chor Ming wrote: High ESR in an old electrolytic cap is a symptom, not a cause. When the ESR measures high, it means that the cap is bad, and should be replaced. Don't think of ESR as the cause -

Hello David, It's getting late over here now, so others may correct me - but I have read over your voltage measurements and it seems that Jimmy has hit the nail right on the head. Q872 e = +0.7v c = +

The 2236 also had the same display. I believe it added delta time measurement, or something similar to the display. Are you sure the display itself is bad? The device is a VFD. There were no real

I know the 2247A can make automated on-screen voltage and frequency measurements. The 2246A does the same without the counter/timer functions. The 2445B, 2455B, 2465B, and 2467B have optional

On 21/01/2012 04:45, jtjewell83 wrote: > > David, > > I agree with Jerry---You don't need an isolation transformer to work on this scope. T801 provides all of the isolation necessary. > > I still

Hi David, It takes some time to remember what all those circuits in the 7T11 are doing! The shift in output of U512A in a 5-2-1 sequence corresponds nicely (as should be) to the increase in feedback

I bought a 2235 on E-bay because it had the DMM/Freq counter and the digital display is bad. I am wondering what other models have the DMM/counter BUT display on the scope itself?

Good Day, I have no intentions to start any long discussions here, so I decided to stay away from any. However, I would want to give a recommendation to David: Start your own internet research on

Joe, Thanks for the suggestion, but I'd already found Albert's posts earlier in the day, and it really doesn't match - here we're talking about the trace shifting off screen to the left not the right.

Stephan has the right idea, David. 1/4 inch dia. ceramic coated .01uF 100V ceramic disks are very common (at least over here). The ceramic easily chips off to expose the blobs of solder that attach

Folks, I scanned the 121 manual and the PDF file is here: http://w140.com/tekwiki/wiki/121 There is a scan on BAMA of the same document, but that scan is cut off in a couple of places. As always, if

Joe, Perhaps a good moment to tell whether your 7T11 indeed had a trim cap problem? Or was it another fault that would be good to know about? Albert

David, Try searching "7T11 Failing Trim Caps" in the archives. This contains information on shifting trace problem. Joe

Yes indeed, the 2220 is virtually identical to the 2230 in most respects - just a notch down to fill the price v. performance market position at the time. The 2200 series models share the same basic

In equivalent time, sequential mode, the trace is shifting left as I rotate the time/div knob. All measurements were made on the 50nS sweep range with the timebase triggered from Pulse Out. Looking at

When I was searching for a replacement channel swtich, I found that a number of the 22xx series oscilloscopes have the same main board which has the power supply including the 2213A, 2215A, 2230,

Hi Tan, Some one told me that the 2220 is the 60 MHz version of the 2230 100 MHz scope. If this is true, the 2230 manual might be your best bet. It is available from several places including:

Personally I would see what can be done with SMD or removing the epoxy and leads from a leaded capacitor. ST <david.partridge@...> wrote:

Drats - I meant to type 10nF Regards, David Partridge