Great to see this. I worked 40 years ago as troubleshooter for the analogue and digital storage oscilloscopes in the production plant in Heerenveen, the Netherlands. The curvetracer was used for measuring transistors in the troubleshooting process. Nice you restored this peace of equipment. It is using the old style ceramic component strips. The silver solder is specially for these strips otherwise they could crack and had to be replaced. High quality standards in those days. For cleaning contacts only isopropanol alcohol was allowed. Thanks for sharing!
In the past I have carefully dragged a small strip of paper soaked in Electrosolve (contact cleaner) through those gold contacts while each one was closed and had it solve my intermittent issues. It doesn't take much, even IPA would probably work. As long as they are clear of foreign material, the contacts are quite reliable. I would probably stay away from anything that leaves a film behind like DeoxIT. I love DeoxIT, but I don't use it in this situation. Nice work bringing it back to life, I thought it was gone for sure!
Fantastic! Really enjoyed that whole series! It was great to see how those switch assemblies look internally. Will keep that in mind when one of mine starts to go 😂
Excellent work and great outcome and as I said in the last video " I'm sure you have eliminated dirty wafer switches and pots so your really close " dirty or broken is the same thing ! I look forward to the future of you channel I am sure it will continue to grow as well as it has...cheers.
@@IMSAIGuy How did you figure out what knob position was matched with the cam's blank spot? I'm guessing there was a no-function spot on the panel? Either that or figure out some sort of temporary method to clamp the cam tube to the knob and gradually figure out the proper position. Glad to see the curve tracer brought back to usefulness again!
Do not attempt to adjust the picture We are controlling transmission We will control the horizontal We will control the vertical We can change the focus to a soft blur or sharpen it to crystal clarity
@@IMSAIGuy I removed the knob on the horizontal volt/division and the mounting screws for that board and moved it out of the way to get access. The zero and invert button covers can be carefully pulled off from the front. I put the unit with the front face down and sprayed IPA into the switch and caught the residue in a towel.
now that it is all functional, the funniness gets better and better. probably some resistance that is healing itself. people say just clean everything, but they have never been in front of this beast. It would take a month to tear it down, fix the switches and put it back together. I find it perfectly usable in the present state. I did do a calibration that took about three hours and it is doing well. more videos on using it will come
Thank you. Is there any way of finding the values of capacitors in the back behind the boards. My 576 needs them replaced. I am restricted due to space. Can't have the unit open for long. I would love to have the caps before disassembly. Any info would be greatly appreciated
Why did you skip the gluing part? Was there anything confidential there or you mess you the gluing the parts? Crazy glue does not work well for plastics.
The curve tracer reminds me of the Heathkit Q meter I bought at an estate sale some years ago. A device designed to measure quantities that advances in engineering design methods have rendered... not quite irrelevant, but rendered unnecessary from a measurement perspective. Q still matters; no one needs to measure the Q of particular components.
Ok so I am supposed to make a comment after doing so the last video,.... hum Well first congratulations on the progress. You want me to say knob twiddling was a deciding factor, well it may have helped. But the important aspect is you moved from twiddling to diagnosis. (I am trying to retain my basic smart-ass-ness here you know.) ;-} There remains a problem yet so - some time it would be good to complete the diagnosis. But certainly the curve tracer is useful in the present state. I don't always finish every little bit either. Why do now that which can be done later?... I am supposing that the display on the right side of the CRT is for recording settings with a camera. It would be nice to see that restored also but finding the parts may take sometime. Maybe people part these out? I don't know. Show us the tech behind the window. Perhaps viewers may have what is needed,... ? But for $200 + some twiddling + diagnosis = you have a useful instrument! Not bad altogether. --- This opens a whole new range of testing things for your videos,... like those peanut tubes,... ;-}
I'm sorry my 9 episodes did not show the 100 hrs and one month of diagnosis leading me to determine the fault must be mechanical. the symptom was always clear: turn the knob nothing happens. there was so much wrong with the unit it took a lot of work to even worry about that problem until I got the rest functional. The digital readout does work fine if you turn the illumination knob all the way up. I will have some more videos on curve tracers in the future.
@@IMSAIGuy well in any case I want you to know that I look forward to your videos everyday, most of them are quite interesting. This one is no exception and I believe that there was a hundred hours behind there. Sincerely Dan
Great to see this. I worked 40 years ago as troubleshooter for the analogue and digital storage oscilloscopes in the production plant in Heerenveen, the Netherlands. The curvetracer was used for measuring transistors in the troubleshooting process. Nice you restored this peace of equipment. It is using the old style ceramic component strips. The silver solder is specially for these strips otherwise they could crack and had to be replaced. High quality standards in those days. For cleaning contacts only isopropanol alcohol was allowed. Thanks for sharing!
In the past I have carefully dragged a small strip of paper soaked in Electrosolve (contact cleaner) through those gold contacts while each one was closed and had it solve my intermittent issues. It doesn't take much, even IPA would probably work. As long as they are clear of foreign material, the contacts are quite reliable. I would probably stay away from anything that leaves a film behind like DeoxIT. I love DeoxIT, but I don't use it in this situation. Nice work bringing it back to life, I thought it was gone for sure!
Fantastic! Really enjoyed that whole series! It was great to see how those switch assemblies look internally. Will keep that in mind when one of mine starts to go 😂
Excellent work and great outcome and as I said in the last video " I'm sure you have eliminated dirty wafer switches and pots so your really close " dirty or broken is the same thing ! I look forward to the future of you channel I am sure it will continue to grow as well as it has...cheers.
Here here.
Awesome, is nice to see it functioning once again, is amazing. Pay back the time you put up on this unit, never give up!
And it was, in that instant, both so much easier and fiendishly more difficult to fix.
That's great. Sorting out that cam must have been a nightmare. You'd thing there would be a locking groove or something.
Exactly, I would have expected a 'Key' or some datum.
it took about 1/2 hour convincing myself I had it right.
Congratulations. Looking forward for the funny business solution!
It seems like we missed the resolution to the cliffhanger... how did you figure out the correct position of the knob relative to the cams?
I did talk about the cam having a blank spot that denoted a starting position. I took a lot of thought to figure it out
@@IMSAIGuy How did you figure out what knob position was matched with the cam's blank spot? I'm guessing there was a no-function spot on the panel? Either that or figure out some sort of temporary method to clamp the cam tube to the knob and gradually figure out the proper position. Glad to see the curve tracer brought back to usefulness again!
Do not attempt to adjust the picture
We are controlling transmission
We will control the horizontal
We will control the vertical
We can change the focus to a soft blur
or sharpen it to crystal clarity
I watched that show religiously
I think the "going funny" works with your Normal - Abnormal intro :) Otherwise Congrats on getting it working even with a Normal/Abnormal state.
What happened with the tracer you have made before?, can you compare the results? which is more reliable?
I learned a long time ago to mark my switches before taking them apart lol. I heard the classic "oh no" when you realized it wasn't indexed lol.
After all the work you put in I agree with Dino Papas for a little more investigation ...
Check the zero, invert and cal push buttons. Cleaning with IPA helped clear up a similar issue with mine.
I would if I could figure out how to get to them without dismantling half of the unit.
@@IMSAIGuy I removed the knob on the horizontal volt/division and the mounting screws for that board and moved it out of the way to get access. The zero and invert button covers can be carefully pulled off from the front. I put the unit with the front face down and sprayed IPA into the switch and caught the residue in a towel.
Congrats! Hate to see the series end, maybe you'll give us an update sometime after addressing the "...something's going funny..." issue!
now that it is all functional, the funniness gets better and better. probably some resistance that is healing itself. people say just clean everything, but they have never been in front of this beast. It would take a month to tear it down, fix the switches and put it back together. I find it perfectly usable in the present state. I did do a calibration that took about three hours and it is doing well. more videos on using it will come
@@IMSAIGuy loved this series! thanks!
I didn't knew there was a Diode and Transistor curve tracer equipment existed.
Thank you. Is there any way of finding the values of capacitors in the back behind the boards.
My 576 needs them replaced.
I am restricted due to space. Can't have the unit open for long.
I would love to have the caps before disassembly. Any info would be greatly appreciated
It is all in the service manual
well done!
Nice repair!
Why did you skip the gluing part? Was there anything confidential there or you mess you the gluing the parts? Crazy glue does not work well for plastics.
I needed to concentrate and making videos causes me to make mistakes. You are right about the glue. I used epoxy
Nice work! 👍
At 5:30 you left us hanging. You never explained what you did with the cam switch.
Nice job..,
The curve tracer reminds me of the Heathkit Q meter I bought at an estate sale some years ago. A device designed to measure quantities that advances in engineering design methods have rendered... not quite irrelevant, but rendered unnecessary from a measurement perspective. Q still matters; no one needs to measure the Q of particular components.
Hahahaha!
Woot
Ok so I am supposed to make a comment after doing so the last video,.... hum
Well first congratulations on the progress.
You want me to say knob twiddling was a deciding factor, well it may have helped.
But the important aspect is you moved from twiddling to diagnosis.
(I am trying to retain my basic smart-ass-ness here you know.) ;-}
There remains a problem yet so - some time it would be good to complete the diagnosis.
But certainly the curve tracer is useful in the present state.
I don't always finish every little bit either. Why do now that which can be done later?...
I am supposing that the display on the right side of the CRT is for recording settings with a camera. It would be nice to see that restored also but finding the parts may take sometime.
Maybe people part these out? I don't know. Show us the tech behind the window.
Perhaps viewers may have what is needed,... ?
But for $200 + some twiddling + diagnosis = you have a useful instrument!
Not bad altogether.
---
This opens a whole new range of testing things for your videos,...
like those peanut tubes,... ;-}
Howdy Smart Arse !
I'm sorry my 9 episodes did not show the 100 hrs and one month of diagnosis leading me to determine the fault must be mechanical. the symptom was always clear: turn the knob nothing happens. there was so much wrong with the unit it took a lot of work to even worry about that problem until I got the rest functional. The digital readout does work fine if you turn the illumination knob all the way up. I will have some more videos on curve tracers in the future.
@@IMSAIGuy I bet there's hours and hours on the cutting room floor ! Great Work !
@@IMSAIGuy well in any case I want you to know that I look forward to your videos everyday, most of them are quite interesting. This one is no exception and I believe that there was a hundred hours behind there. Sincerely Dan
👍👍👍👍👍👍👍👍