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I don't fully understand why one is making such a general anecdotals claims... unless... 1) it is an "err on the side of caution" type admonition. 2) it is on the "recommendation" of some YouTube

Hmm, so it seems Tektronix (or Tektronix Japan at least) have no info on this part at all, but were more than happy to offer me calibration services, how they could without having access to the

In this present world of “instant gratification” utilizing electronic means to send messages and documents I do realize that it is somewhat difficult for some people to understand the sloggingly

Thanks for the reply Tom. I thought better of the change as well since Tek made a boat load of these with absolutely no change in component value over the lifetime of the instrument. My load board was

I am late to this party but I fixed one smilar unit by replacing the power FET in the switching power supply.? Perhaps yours has a similar problem.

Thanks Dave, as far as I can tell all the 7904 manuals on the TekWiki are for s/n b260000 and up.

I *really* appreciate all the views here. Lots to think about. I am ok with replacing the LVPS e-caps and those x2's too. And it will be good to look at the infamous SMD's on A5. Haven't done that yet

for my 0.01 dollar worth... it was an intermittent power cord... when I had dozens of "good" ones... but not the imagination to imagine that could be the problem. Lesson learned... I hope.

Like... with bottled water... one is relying on the company/manufacturer's claim the product is "safe" and "effective." I note that according to public information the product mentioned allegedly has

Look at the TekWiki site. There are several manuals there. I don’t know what S/N ranges they cover. DaveD

I hate to interject into this very interesting and exciting thread which I am finding much more interesting than CNN, but one thing does concern me. That is I have spent many hours searching for a

Wes, What kind of signal are you applying to the input(s)?. How is your front panel set up? It could be a simple case of the front panel being set wrong. -- Michael Lynch Dardanelle, AR

Seems like an unblanking issue.? Trace the signal that is supposed to raise the CRT control grid potential during sweep.? Sweep gate.

I am trying to repair a TEK 465 oscilloscope that my friend bought from ebay. It does not have a trace unless I push the Beam Finder button. A trace then appears that I can move vertically,

I don't dispute the issues you are experiencing with mail delivery but it is not like this . Dennis Not that it matters but my latest Media Mail experience is I shipped a book to Southern California

Histrionics, I love it! You must live in an alternate universe from the rest of us. I would rank electrolytic capacitors as being the second least reliable part in modern electronics, narrowly being

I haven't looked at the schematic, so I can only speak in general terms. If that cap is indeed part of a loop compensator, I think it's ill advised to go about modifying it in any ad hoc way. Whether

My new (to me) s/n B041515 7904 arrived DOA. (ebay, "not working, for parts".) With the help of my mostly trusty DSO138 I found the shorted 47/25V dipped tantalum on the -15 supply. Replaced it with a

Let's see your stats for Tektronix equipment. I have never seen tants from Tek gear eject into ceiling tiles. I reject any dogma that is uninformed by relevant data. -- Prof. Thomas H. Lee Allen Ctr.,

Re. recapping 2465B Youre on the cusp of learning the *hard way* why advice to NOT replace caps is extremely bad. Out of the multiples of semi load after semi load of equipment I worked on "back in