Finished log overlay for 5000 series (5L4N) scopes. See photo album https://groups.io/g/TekScopes/album?id=273149 Dave

Jeff, I needed a trimmer replacement for a 5000 series PS, and though some were available via auction, Mouser had Amphenol replacements that were much more reasonably priced and available in quantity.

Enjoy: https://groups.io/g/TekScopes/album?id=273149

Turns out MacBook's default "Pages" document tool was sufficiently capable to construct a good facsimile of the overlay as pictured on the TekWiki 5440 page. Nice that the layout measurements translat

I thought vinyl too, but then realized getting a good flat application could be challenging. CRT shields are hardly ever without blemish nor exhibit ideal finish, and just an old fashion transparency

Sphere has their "Hoods, Filters, & Bezels" page, https://www.sphere.bc.ca/test/tek-parts/tektrim.html, but doesn't include the 5000 series audio log scale screens. Given what I've seen they are actua

I knew I'd seen one before, but somewhere a bit off: It's on the scope in the main picture for the 5440, https://w140.com/tekwiki/wiki/5440, but without a 5L4N.

Hi All, I've gotten my 5L4N tuned well enough to make use of it. Learned a heck of a lot in the process! It's still a bit sketchy. Getting frequency linearity was _just_ barely achievable, but I think

Jeff, Looking at the schematic it looks like your unregulated values are not that far off: C4439 + terminal, +110v unreg = 150.6 Collector of Q4301, +55v unreg = 70.5 Collector of Q4401, +15v unreg =

A solution is to use a JAMMA extender. JAMMA is an arcade game console standard: https://en.wikipedia.org/wiki/Japan_Amusement_Machine_and_Marketing_Association Note that the wiki page also identifies

I wasn't thinking things through completely. After I figured out I could unscrew the nylon (that's what we'll call it for now) coupler I saw that the shaft had the nylon connection between the pot sha

Hi Paul, Yes, it is a mundane little panel mount button - thus my consternation at the idea of spending $20 on it. But I think I'm becoming an old codger (becoming!? they all laughed out loud). $20 sa

Now that I'm done fiddling with using the 5113's interface to test the 5111A bandwidth I'm moving to rehab the display module. It came with a damaged Left Vertical Intensity/Focus knob, and the Beam F

It's been a busy week, and lots I could share, but then this post we be long. I'll try to be brief: I've added an album: https://groups.io/g/TekScopes/album?id=271493 And included a picture of the 511

Barry, How did you end up removing the parts? It's good to know techniques that actually work, instead of figuring it out after you've broken it! Dave

The PS ends of the P640 and P740 connectors are soldered directly to the PS board. The pictures of the 5116 PS board on the TekWiki look identical to the 5111A. You can see the connectors to the botto

Thanks for the input Paul. Good point about the 5111 vs. 5111A. The only thing I've seen regarding the difference between the two is what's on the TekWiki page for 5000 series scopes - the overview, n

Between the holidays, and addressing disarray that is my garage/shop, I got my bench cleared off yesterday. It had been occupied by 7D15 work. Afterward I was able to open up and disassemble the inter

I said I'd post an update when fixed. I can't say fixed, but replacement of the failed U237 MC1662 chip has been successful. Having the right tools, and a good YouTube video showing how to remove a DI

Thanks, good point Jim. I'm not completely familiar with this circuit nor MECL implementation details yet. I don't think there's a Vtt in this design, but there are occasional Rs to Gnd on the same ci