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BernieThe 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?<a href="https://mstdn.io/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://mstdn.io/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://mstdn.io/tags/repair" class="mention hashtag" rel="nofollow noopener" target="_blank">#repair</a>

BernieI went to the Artisan's Asylum and found someone who was attempting to repair this beautiful CRT oscilloscope by Tektronix.<a href="https://mstdn.io/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://mstdn.io/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://mstdn.io/tags/repair" class="mention hashtag" rel="nofollow noopener" target="_blank">#repair</a>

Joost RekveldRepaired two of my five broken-and-fragile-but-still-great FG504 Tektronix signal generators. I repaired a third but then it grew a new problem in the output amplifier similar to the problem also shown by a fourth. There are 12 transistors in those output amplifiers and in each case it is a bit of a puzzle to try and understand which one is the cause of the problems. <a href="https://assemblag.es/tags/Tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tektronix</a> #79 <a href="https://assemblag.es/tags/SystemsThatMatter" class="mention hashtag" rel="nofollow noopener" target="_blank">#SystemsThatMatter</a>

PaulWell…. Shit. I was going to fix some RAM issues with this <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> 7D20 plugin, but it seems to have developed a display issue 😑

Joost RekveldAbout 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.<a href="https://assemblag.es/tags/Tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tektronix</a> #79 <a href="https://assemblag.es/tags/SystemsThatMatter" class="mention hashtag" rel="nofollow noopener" target="_blank">#SystemsThatMatter</a>

amen zwa, esq.I have to ask Dima <a href="https://mathstodon.xyz/@dimpase" class="u-url mention" rel="nofollow noopener" target="_blank">@dimpase</a>, my fellow behind-the-Iron-Curtain denizen: mate, do you recognise these older Tektronix oscilloscopes?Some of the 1950s Tektronix scopes in this Tek museum in Oregon look remarkably like the then-new Soviet scopes supplied to my engineering school in Burma, back in the 1980s.😀 <a href="https://mathstodon.xyz/tags/Vintage" class="mention hashtag" rel="nofollow noopener" target="_blank">#Vintage</a> <a href="https://mathstodon.xyz/tags/Tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tektronix</a> <a href="https://mathstodon.xyz/tags/oscilloscope" class="mention hashtag" rel="nofollow noopener" target="_blank">#oscilloscope</a><a href="https://youtu.be/Jxdx6tsvSN8?si=CsLBG7mYKVMrcJDg" rel="nofollow noopener" translate="no" target="_blank">https://youtu.be/Jxdx6tsvSN8?si=CsLBG7mYKVMrcJDg</a>

PaulFound a low mileage <a href="https://oldbytes.space/tags/nikon" class="mention hashtag" rel="nofollow noopener" target="_blank">#nikon</a> D810 for a good price and decided to take the plunge. Here’s a <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> type O operational amplifier plug-in in a Type 132 power supply, which lets one operate a plug-in outside of its host <a href="https://oldbytes.space/tags/oscilloscope" class="mention hashtag" rel="nofollow noopener" target="_blank">#oscilloscope</a>. 2 flash setup, one with a soft box, the other a bounce. 105mm <a href="https://oldbytes.space/tags/macro" class="mention hashtag" rel="nofollow noopener" target="_blank">#macro</a> lens.

Joost RekveldSpent some time today trying to reduce the ringing on top of this PWM switching of a 200W load. Nice to be using that oscilloscope again.<a href="https://assemblag.es/tags/Ringing" class="mention hashtag" rel="nofollow noopener" target="_blank">#Ringing</a> <a href="https://assemblag.es/tags/Tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tektronix</a> #79 <a href="https://assemblag.es/tags/SystemsThatMatter" class="mention hashtag" rel="nofollow noopener" target="_blank">#SystemsThatMatter</a>

poleguy looking for lost toolsI'm starting to do the repair in this video: TDS220 <a href="https://www.youtube.com/watch?v=weUSGjzEoVM" rel="nofollow noopener" translate="no" target="_blank">https://www.youtube.com/watch?v=weUSGjzEoVM</a><a href="https://mastodon.social/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://mastodon.social/tags/Tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tektronix</a> <a href="https://mastodon.social/tags/repair" class="mention hashtag" rel="nofollow noopener" target="_blank">#repair</a> <a href="https://mastodon.social/tags/diy" class="mention hashtag" rel="nofollow noopener" target="_blank">#diy</a>

PaulVoltage 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. <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://oldbytes.space/tags/oscilloscope" class="mention hashtag" rel="nofollow noopener" target="_blank">#oscilloscope</a> <a href="https://oldbytes.space/tags/CRT" class="mention hashtag" rel="nofollow noopener" target="_blank">#CRT</a> <a href="https://oldbytes.space/tags/nixie" class="mention hashtag" rel="nofollow noopener" target="_blank">#nixie</a> <a href="https://oldbytes.space/tags/1960s" class="mention hashtag" rel="nofollow noopener" target="_blank">#1960s</a> <a href="https://oldbytes.space/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://oldbytes.space/tags/retroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#retroTech</a>

PaulLook 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) <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://oldbytes.space/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://oldbytes.space/tags/1960s" class="mention hashtag" rel="nofollow noopener" target="_blank">#1960s</a> <a href="https://oldbytes.space/tags/retroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#retroTech</a> <a href="https://oldbytes.space/tags/rant" class="mention hashtag" rel="nofollow noopener" target="_blank">#rant</a> <a href="https://oldbytes.space/tags/oscilloscope" class="mention hashtag" rel="nofollow noopener" target="_blank">#oscilloscope</a>

IT NewsOscilloscope Digital Storage, 1990s Style - You’re designing an oscilloscope with modest storage — only 15,000 samples per cha... - <a href="https://hackaday.com/2025/05/09/oscilloscope-digital-storage-1990s-style/" rel="nofollow noopener" translate="no" target="_blank">https://hackaday.com/2025/05/09/oscilloscope-digital-storage-1990s-style/</a> <a href="https://schleuss.online/tags/analogshiftregister" class="mention hashtag" rel="nofollow noopener" target="_blank">#analogshiftregister</a> <a href="https://schleuss.online/tags/oscilloscope" class="mention hashtag" rel="nofollow noopener" target="_blank">#oscilloscope</a> <a href="https://schleuss.online/tags/toolhacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#toolhacks</a> <a href="https://schleuss.online/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://schleuss.online/tags/teardown" class="mention hashtag" rel="nofollow noopener" target="_blank">#teardown</a>

PaulCome to where the flavor is. Come, to Bodgetown. <a href="https://oldbytes.space/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://oldbytes.space/tags/1960s" class="mention hashtag" rel="nofollow noopener" target="_blank">#1960s</a> <a href="https://oldbytes.space/tags/retroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#retroTech</a>

Paul8/ video showing what may have been the worlds first auto-ranging oscilloscope in action. <a href="https://oldbytes.space/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://oldbytes.space/tags/retroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#retroTech</a> <a href="https://oldbytes.space/tags/vintageTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#vintageTech</a> <a href="https://oldbytes.space/tags/1960s" class="mention hashtag" rel="nofollow noopener" target="_blank">#1960s</a>

Paul7/ It was the nuvistor. It’s always the f$&king nuvistor. Both autoranging plug-ins are somewhat working. Vertical plug-in still has some ranging issues, and the horizontal plug-in is slow to un-blank, which becomes a problem at higher sweep speeds. I’ll tackle that next. <a href="https://oldbytes.space/tags/retroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#retroTech</a> <a href="https://oldbytes.space/tags/vintageTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#vintageTech</a> <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://oldbytes.space/tags/1960s" class="mention hashtag" rel="nofollow noopener" target="_blank">#1960s</a> <a href="https://oldbytes.space/tags/testEquipment" class="mention hashtag" rel="nofollow noopener" target="_blank">#testEquipment</a> <a href="https://oldbytes.space/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a>

Paul5/ I use brass polish to clean a lot of faceplates, mostly because I once lived in an apartment with all brass door hardware, still have the polish, and one day decided to give it a go. I’m sure there’s a better thing to use, and someone may tell me why using it is a terrible terrible thing, but it’s doing a heck of a job getting decades of cigarette smoke off the face of this thing, even on translucent plastic. <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://oldbytes.space/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://oldbytes.space/tags/vintageTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#vintageTech</a> <a href="https://oldbytes.space/tags/retroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#retroTech</a>

Paul2/ One of the curiosities on the prototype of this <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> plug-in is the elapsed time meter on the bottom. It is not present on the production unit. There is a note that I cannot decipher with a date or February 16 1966. This type of indicator is a Mercury Coulometer, and shows time elapsed using a chemical reaction which moves a drop of mercury in a capillary tube slowly and linearly as chemical reaction is caused by the passage of a small, fixed current. This unit has a large number of reed relays, which have a finite lifespan, and I wonder if this meter was there to measure usage during testing.

Paul🎶 ooops, I did it ah-gain I bought four more SCOOOOPES…. I have, no. Self control. 🎶 <a href="https://oldbytes.space/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://oldbytes.space/tags/retroTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#retroTech</a> <a href="https://oldbytes.space/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://oldbytes.space/tags/testEquipment" class="mention hashtag" rel="nofollow noopener" target="_blank">#testEquipment</a> <a href="https://oldbytes.space/tags/1960s" class="mention hashtag" rel="nofollow noopener" target="_blank">#1960s</a>

IT NewsRecreating the Analog Beauty of a Vintage Tektronix Oscillator - Tektronix must have been quite a place to work back in the 1980s. The company offe... - <a href="https://hackaday.com/2025/03/29/recreating-the-analog-beauty-of-a-vintage-tektronix-oscillator/" rel="nofollow noopener" translate="no" target="_blank">https://hackaday.com/2025/03/29/recreating-the-analog-beauty-of-a-vintage-tektronix-oscillator/</a> <a href="https://schleuss.online/tags/totalharmonicdistortion" class="mention hashtag" rel="nofollow noopener" target="_blank">#totalharmonicdistortion</a> <a href="https://schleuss.online/tags/classichacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#classichacks</a> <a href="https://schleuss.online/tags/oscillator" class="mention hashtag" rel="nofollow noopener" target="_blank">#oscillator</a> <a href="https://schleuss.online/tags/tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#tektronix</a> <a href="https://schleuss.online/tags/sinewave" class="mention hashtag" rel="nofollow noopener" target="_blank">#sinewave</a> <a href="https://schleuss.online/tags/analog" class="mention hashtag" rel="nofollow noopener" target="_blank">#analog</a> <a href="https://schleuss.online/tags/parts" class="mention hashtag" rel="nofollow noopener" target="_blank">#parts</a> <a href="https://schleuss.online/tags/fft" class="mention hashtag" rel="nofollow noopener" target="_blank">#fft</a> <a href="https://schleuss.online/tags/tek" class="mention hashtag" rel="nofollow noopener" target="_blank">#tek</a> <a href="https://schleuss.online/tags/thd" class="mention hashtag" rel="nofollow noopener" target="_blank">#thd</a>

MiDWaNProbably the most impressive machine in the event, for me at least. <a href="https://mastodon.social/tags/Tektronix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tektronix</a>

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