techhub.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
A hub primarily for passionate technologists, but everyone is welcome

Administered by:

Server stats:

4.6K
active users

#Tektronix

3 posts2 participants0 posts today

I’m embarrassed to admit how many sampling heads I tried before I realized I had the wrong vertical mode selected.
5. It was 5.
Also the graticule lights just went out, and the readout is on the fritz again (both voltage and time displays are incorrect). I seem to remember that from this mainframe. The Tektronix readout system on the 7k series is the work of a mad genius.
#tektronix #oscilloscope #1980s #retroTech

Continued thread

The thick book with a blue cover on the left is Tektronix's service manual, which includes detailed schematics and troubleshooting procedures.

This remarkable piece of hardware seems to be in good hands, I'm looking forward to see it work again.

I forgot to ask the model. Can anyone guess it?

It got worse before it got better. The #tektronix 7D20 digital #oscilloscope plugin had 3 bad RAM chips, as indicated by the self test, which caused some anomalies in the displayed waveform, but no other issues. I removed the chips and put in sockets, but one of the replacement 4116 RAM chips was also bad, in a way that caused the entire display to go south. I didn’t realize until a read through the manual that the waveform memory is also used to store readout data in its way to the DACs.

About five years ago I had six working Tektronix FG504 signal generators, most of them quite seriously repaired after I managed to find eight of them, but with only one working as-found. They are fantastic but also fragile (and 40-50 years old): yesterday I was again down to only one working generator: time to start on those postponed repairs.

#Tektronix #79 #SystemsThatMatter

Found a low mileage #nikon D810 for a good price and decided to take the plunge.
Here’s a #tektronix type O operational amplifier plug-in in a Type 132 power supply, which lets one operate a plug-in outside of its host #oscilloscope.
2 flash setup, one with a soft box, the other a bounce. 105mm #macro lens.

Voltage measurements starting to show signs of life after swapping out a few bum transistors in the 0% zone card. The 0% cursor isn’t working yet, so I don’t know where it’s measuring from, but I can get changing readings by moving the 100% cursor. The change roughly corresponds the peak to peak amplitude, which is promising.

Look at this sexy-ass piece of engineering. Check out what happens when smart people harness downright magic.
It reminds me of the onion headline “Humanity Still Producing New Art As Though Megadeth’s ‘Rust In Peace’ Doesn’t Already Exist”.
Imagine seeing this and thinking “oh sure, but I’ll make something better”. GTFO, no you won’t. It’ll be faster and more accurate and cheaper and lighter and have a fucking touchscreen and USB, and a fucking subscription, and it’s going to have the soul of a republican, and every time you touch it, an MBA will get an erection.
GAH, this is just so damn pretty.
(And Rust in Peace is an epic, seminal album)
#tektronix #electronics #1960s #retroTech #rant #oscilloscope

Heck yeah!!!
Finally fixed the slow unblanking issue in this rather unique horizontal plug-in for 560 series #tektronix scopes.
TL;DR, it was R268, which went high. Not so high as to sway the voltage under no load conditions, but squishy enough that it effected the rise time when current was to be driven into a capacitive load.
Thanks for the assist @kurt!