Keep spreading your knowledge, Dennis and don't police yourself! Raymond

Good news! Raymond

Hi Dennis, You're right, we strayed. This is how we got here: While discussing the modular construction of the 577 curve tracer and the possibility of changing a 577D2 into a 577D1, this happened: Ver

Hi Chuck, Thanks for checking that, so it's off my mind. I agree re. Q4432, Q4440, and all of those high resistance resistors in the focus chain. Interesting and intriguing! Raymond

Hi Chuck, Yes I'm curious, probably easy to do. Raymond

The beam current definitely changes each time between turning intensity down and up again, as the case describes. Although I can understand a jittery/jumping Q4432 role, is there a reason *not* to sus

Chuck, I assume that after fiddling with the astig setting, you always end up at the setting before turning down intensity? Did you try not touching the astig setting after turning intensity back up?

Fortunately, even without an external computer, it just works, including storage and recall of waveforms. The threshold is lower than you'd think. Raymond

Forgot to mention that the P7001 DPO can be used as a normal P7704A, without limitation. Raymond

This is incorrect. The DPO that you're referring to used a 7704A, with separate sections. The 7704 had the old, one-piece construction. the later 7904/7904A have the same distinction. Between the top

As I wrote in an earlier post, swapping in a D11 display module is really simple. Just have a look at the circuit diagrams, open the 'scope and 577 and have a look at the identical physical layout and

That is correct. I think I had to rearrange a few wires, that's all. Raymond

5103N/D10 was the original name for the 5110, 5103N/D11 was the original name for the 5111, you get the gist. Dxx refers to the display part only. See http://www.i9t.net/5000_scopes.html Raymond

D11 refers to the display module only. For a good and thorough description of the 5000-series, have a look here: http://www.i9t.net/5000_scopes.html Raymond

Dennis, Earlier today I wrote that it *is* modular, that it is really simple to remove the top (display) part of a 577D2 and put a single-beam storage display module (D11) in its place and connect. Th

@ DaveD: Re. What is a “D11”? I was referring to this post: A D11 is a single-beam, non-storage display module, used in the 5000-series 'scopes. Raymond

I modified my 577D2 into a 577D1 by replacing its display module with a D11 storage module. No big deal to swap the complete units; Tek built and configured their nonstorage- and storage mainframes in

Chuck and Steve, It turns out I wasn't as clear as I intended and did not distinguish possible situations/combinations in my description. First: No, Chuck, I never experienced data loss through handli

As Colin says: Depends on what you consider "outer": longitudinally or radially with regard to the shaft... As I mentioned earlier, the part no. refers to the ribbed knob for trigger level, not the ri

AFAIK, it's the outer (ribbed) knob, according to available documentation... Raymond