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Thanks for adding the link, Raymond!

All of this 7904(A) talk has inspired me to get my 7904A (SNB011071) checked out and calibrated. But I don't have the equipment to do it. Does anyone here do scope calibrations for hire within say

Link: /g/TekScopes/album?id=247921 Raymond

Dennis, I would like to learn more about this subject, if Dennis (or anyone else) cares to expand and such an explanation would not require a thesis length document. I have a basic understanding

There is a 7904a mainframe, SN B010951, on ebay here: https://www.ebay.com/itm/Tektronix-7904A-Oscilloscope-Mainframe/224026842411 It has a raised Tek badge that I've never seen. Is that a factory

Hi Sean, I had the same Problem, but it is easy to fix. You can take the plugable power lamp apart and you will find a small bulb inside. Just remove it and solder in a replacement bulb. I had one in

DSOs (digital oscilloscopes) offer a great many advantages over their analog equivalents but as they say, “There’s no such thing as a free lunch.” Digital scopes sample, digitize, and store

Wouldn't it be possible to use the kludge that I'm sure I wasn't alone in using periodically to "repair" glass fuses? A piece of appropriate fuse-wire was soldered to the end-caps of the blown fuse.

For the larger circuit diagrams, I simply go to a local print shop and get them to print them on A3 paper. Very cheap, very quick, very simple, and perfectly adequate on the few occasions when I need

Competition made both companies better. -- Michael Lynch Dardanelle, AR

---- HP triggering was far Hi Dennis, What was in HP scope's triggering that made it far superior to Tektronix's? I always consider triggering as something very simple in principle, the comparison

Folks, I have an HP Business 2800 Inkjet which will print out full size Tek or HP schematics as well but I suspect we are more of an exception. However for us with larger printers or monitors, I

Sean, Thanks. That fuse looks pretty easy to make with a 3D printer and an electroplater. If someone wants a 3D printer but SWMBO says no, here's a good argument for getting one. "It's a

Hi, I have the plotter but it has RS232C option & Centronics interfaces only. Would like to get hold of the GPIB board in case any list member knows of the whereabouts of one. Thanks!

I forgot to mention: If interested, please contact me directly: johngord (at) verizon (dot) net --John johngord@...

Free for pickup: Tektronix C1001 BW CCD camera. I live in Venice, California. --John Gord

Hi John, I'm sure Tek's 7904/7A19/7B90 introduction was sweet revenge. HP switched to battling for the crown in Portables next but Tek was on solid ground starting with the first 1nSec risetime 485

Hi Tony, The very reason Tek designed their manuals with large sheets for their schematics was because there is a lot of circuitry on each page. Tek is widely recognized as creating the finest service

The process of transferring a program into the 4041 won't work with most of the System Verification files without a working tape drive, as those programs are called by the SYSVER program as

In my 4041 experiments this weekend, I was able to run the System Verification program by transferring the .asc version I have archived from my PC into the 4041. However, I have to modify steps 4 and