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Does the displayed ripple change with vertical sensitivity? Is the displayed ripple synchronous with the ripple on the +5 volt supply? I do not think the graticule output circuit will work correctly

The 76xx series of 100 MHz oscilloscopes has a similar perplexing pattern. The 7603, 7613, and 7623 which were all released in 1973 use

W.E. could be Western Electric - the outfit that made the parts for telephones back in the day. Ed

Same here with my 475. All filter caps on my 475 are original and it was recommended to leave them be. John I also refurbed a 475 (c. 1973) over this past winter, and it came complete with all the

Hi Nielsen, Measuring ripple especially those having pk-pk 2-4mv seem very tricky to get because noise created by probes in the air near the test point already seeing noise more than 2mv. How did you

I've been considering an analog meter myself and your post made me decide to look again. A great deal came and I took the plunge. I found a Triplett 630-NA Type 3 on eBay and ended up paying a

I checked my early 465 manual (070-1330-00, 1972). It contains a change notice and detailed section that announce and describe the change to a discrete Vertical Output Amplifier for S/N's B040000 and

I just realised that I confused your thread with another current thread: "Introducing myself and my Tek 465 Project". The problem 'scope in that thread has the -8 V problem My manual (070-1330-00)

I also refurbed a 475 (c. 1973) over this past winter, and it came complete with all the original caps (save one that appeared to have been replaced some time in the past). Ripple and voltages were

Hi Neilsen, I did ordered MUR160G diode but end up not replacing it as DMM measurement seems within spec. Secondly, those diode having issues seem specific to particular diodes brand/batches only.

Thanks Raymond. C1569 seems fine, and the -8V supply is also good. The manual seems to specify that Q1514 is there to protect the +120 V supply, and that if it fails, it may cause problems: "Below SN

Sorry i meant thanks Jerry not James ( i work with a James)

That's a very interesting story. I guess you design something but maintaining production is another story. I'd be really curious to know the schematic of the discrete version of that - was an extra

The 7000 series timebases which use that IC are commonly available very inexpensively. The 7B53A for instance are very common and often included with other purchases. I have some notes on which custom

Hi Albert, Thanks a lot for that reference. I knew that S/N's < B250000 had the IC version Vertical Output Amp, that somewhere in the S/N range >= B250000 the IC version was (permanently?) replaced

---In TekScopes@..., <hewpatek@...> wrote : An obvious difference between early and late >=B250000 versions is the replacement of the vertical output amplifier, from an "integrated"

On Thu, 31 Mar 2016 at 19:17 Neil Elver neil.elver@... [TekScopes] < TekScopes@...> wrote: What has people's experience been with the giant power filter caps? > > Do they tend to be

In the past I have overloaded a few plastic packaged power transistors resulting in shrapnel in the ceiling, the wall, me, etc.

Hello, Christoph, No, I don't have PG506/SG503. But I hope that for the vertical cal HP 8175a programmable generator. Would it suffice, what do you think? Also, I have another question. The

Thanks Jerry - I'd be buying a 7000 series time base off feabay for that one IC if not for you! I'd be very curious as to the version difference too. With all the mention of 'touch as little as